1071 lines
33 KiB
C
1071 lines
33 KiB
C
/*
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** Copyright 2008, The Android Open Source Project
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**
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** Licensed under the Apache License, Version 2.0 (the "License");
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** you may not use this file except in compliance with the License.
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** You may obtain a copy of the License at
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**
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** http://www.apache.org/licenses/LICENSE-2.0
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**
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** Unless required by applicable law or agreed to in writing, software
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** distributed under the License is distributed on an "AS IS" BASIS,
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** WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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** See the License for the specific language governing permissions and
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** limitations under the License.
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*/
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#include "installd.h"
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#define CACHE_NOISY(x) //x
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int create_pkg_path_in_dir(char path[PKG_PATH_MAX],
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const dir_rec_t* dir,
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const char* pkgname,
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const char* postfix)
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{
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const size_t postfix_len = strlen(postfix);
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const size_t pkgname_len = strlen(pkgname);
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if (pkgname_len > PKG_NAME_MAX) {
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return -1;
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}
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if (is_valid_package_name(pkgname) < 0) {
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return -1;
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}
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if ((pkgname_len + dir->len + postfix_len) >= PKG_PATH_MAX) {
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return -1;
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}
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char *dst = path;
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size_t dst_size = PKG_PATH_MAX;
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if (append_and_increment(&dst, dir->path, &dst_size) < 0
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|| append_and_increment(&dst, pkgname, &dst_size) < 0
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|| append_and_increment(&dst, postfix, &dst_size) < 0) {
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ALOGE("Error building APK path");
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return -1;
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}
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return 0;
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}
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/**
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* Create the package path name for a given package name with a postfix for
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* a certain userid. Returns 0 on success, and -1 on failure.
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*/
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int create_pkg_path(char path[PKG_PATH_MAX],
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const char *pkgname,
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const char *postfix,
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userid_t userid)
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{
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size_t userid_len;
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char* userid_prefix;
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if (userid == 0) {
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userid_prefix = PRIMARY_USER_PREFIX;
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userid_len = 0;
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} else {
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userid_prefix = SECONDARY_USER_PREFIX;
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userid_len = snprintf(NULL, 0, "%d", userid);
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}
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const size_t prefix_len = android_data_dir.len + strlen(userid_prefix)
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+ userid_len + 1 /*slash*/;
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char prefix[prefix_len + 1];
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char *dst = prefix;
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size_t dst_size = sizeof(prefix);
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if (append_and_increment(&dst, android_data_dir.path, &dst_size) < 0
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|| append_and_increment(&dst, userid_prefix, &dst_size) < 0) {
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ALOGE("Error building prefix for APK path");
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return -1;
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}
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if (userid != 0) {
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int ret = snprintf(dst, dst_size, "%d/", userid);
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if (ret < 0 || (size_t) ret != userid_len + 1) {
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ALOGW("Error appending UID to APK path");
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return -1;
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}
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}
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dir_rec_t dir;
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dir.path = prefix;
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dir.len = prefix_len;
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return create_pkg_path_in_dir(path, &dir, pkgname, postfix);
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}
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/**
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* Create the path name for user data for a certain userid.
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* Returns 0 on success, and -1 on failure.
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*/
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int create_user_path(char path[PKG_PATH_MAX],
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userid_t userid)
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{
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size_t userid_len;
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char* userid_prefix;
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if (userid == 0) {
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userid_prefix = PRIMARY_USER_PREFIX;
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userid_len = 0;
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} else {
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userid_prefix = SECONDARY_USER_PREFIX;
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userid_len = snprintf(NULL, 0, "%d/", userid);
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}
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char *dst = path;
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size_t dst_size = PKG_PATH_MAX;
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if (append_and_increment(&dst, android_data_dir.path, &dst_size) < 0
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|| append_and_increment(&dst, userid_prefix, &dst_size) < 0) {
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ALOGE("Error building prefix for user path");
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return -1;
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}
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if (userid != 0) {
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if (dst_size < userid_len + 1) {
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ALOGE("Error building user path");
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return -1;
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}
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int ret = snprintf(dst, dst_size, "%d/", userid);
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if (ret < 0 || (size_t) ret != userid_len) {
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ALOGE("Error appending userid to path");
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return -1;
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}
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}
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return 0;
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}
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/**
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* Create the path name for media for a certain userid.
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* Returns 0 on success, and -1 on failure.
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*/
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int create_user_media_path(char path[PATH_MAX], userid_t userid) {
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if (snprintf(path, PATH_MAX, "%s%d", android_media_dir.path, userid) > PATH_MAX) {
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return -1;
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}
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return 0;
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}
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/**
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* Create the path name for config for a certain userid.
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* Returns 0 on success, and -1 on failure.
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*/
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int create_user_config_path(char path[PATH_MAX], userid_t userid) {
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if (snprintf(path, PATH_MAX, "%s%d", "/data/misc/user/", userid) > PATH_MAX) {
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return -1;
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}
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return 0;
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}
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int create_move_path(char path[PKG_PATH_MAX],
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const char* pkgname,
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const char* leaf,
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userid_t userid __unused)
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{
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if ((android_data_dir.len + strlen(PRIMARY_USER_PREFIX) + strlen(pkgname) + strlen(leaf) + 1)
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>= PKG_PATH_MAX) {
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return -1;
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}
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sprintf(path, "%s%s%s/%s", android_data_dir.path, PRIMARY_USER_PREFIX, pkgname, leaf);
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return 0;
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}
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/**
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* Checks whether the package name is valid. Returns -1 on error and
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* 0 on success.
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*/
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int is_valid_package_name(const char* pkgname) {
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const char *x = pkgname;
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int alpha = -1;
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while (*x) {
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if (isalnum(*x) || (*x == '_')) {
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/* alphanumeric or underscore are fine */
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} else if (*x == '.') {
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if ((x == pkgname) || (x[1] == '.') || (x[1] == 0)) {
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/* periods must not be first, last, or doubled */
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ALOGE("invalid package name '%s'\n", pkgname);
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return -1;
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}
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} else if (*x == '-') {
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/* Suffix -X is fine to let versioning of packages.
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But whatever follows should be alphanumeric.*/
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alpha = 1;
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} else {
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/* anything not A-Z, a-z, 0-9, _, or . is invalid */
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ALOGE("invalid package name '%s'\n", pkgname);
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return -1;
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}
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x++;
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}
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if (alpha == 1) {
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// Skip current character
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x++;
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while (*x) {
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if (!isalnum(*x)) {
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ALOGE("invalid package name '%s' should include only numbers after -\n", pkgname);
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return -1;
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}
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x++;
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}
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}
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return 0;
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}
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static int _delete_dir_contents(DIR *d,
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int (*exclusion_predicate)(const char *name, const int is_dir))
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{
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int result = 0;
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struct dirent *de;
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int dfd;
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dfd = dirfd(d);
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if (dfd < 0) return -1;
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while ((de = readdir(d))) {
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const char *name = de->d_name;
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/* check using the exclusion predicate, if provided */
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if (exclusion_predicate && exclusion_predicate(name, (de->d_type == DT_DIR))) {
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continue;
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}
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if (de->d_type == DT_DIR) {
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int subfd;
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DIR *subdir;
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/* always skip "." and ".." */
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if (name[0] == '.') {
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if (name[1] == 0) continue;
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if ((name[1] == '.') && (name[2] == 0)) continue;
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}
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subfd = openat(dfd, name, O_RDONLY | O_DIRECTORY);
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if (subfd < 0) {
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ALOGE("Couldn't openat %s: %s\n", name, strerror(errno));
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result = -1;
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continue;
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}
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subdir = fdopendir(subfd);
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if (subdir == NULL) {
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ALOGE("Couldn't fdopendir %s: %s\n", name, strerror(errno));
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close(subfd);
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result = -1;
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continue;
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}
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if (_delete_dir_contents(subdir, exclusion_predicate)) {
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result = -1;
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}
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closedir(subdir);
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if (unlinkat(dfd, name, AT_REMOVEDIR) < 0) {
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ALOGE("Couldn't unlinkat %s: %s\n", name, strerror(errno));
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result = -1;
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}
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} else {
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if (unlinkat(dfd, name, 0) < 0) {
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ALOGE("Couldn't unlinkat %s: %s\n", name, strerror(errno));
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result = -1;
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}
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}
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}
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return result;
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}
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int delete_dir_contents(const char *pathname,
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int also_delete_dir,
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int (*exclusion_predicate)(const char*, const int))
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{
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int res = 0;
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DIR *d;
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d = opendir(pathname);
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if (d == NULL) {
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ALOGE("Couldn't opendir %s: %s\n", pathname, strerror(errno));
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return -errno;
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}
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res = _delete_dir_contents(d, exclusion_predicate);
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closedir(d);
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if (also_delete_dir) {
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if (rmdir(pathname)) {
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ALOGE("Couldn't rmdir %s: %s\n", pathname, strerror(errno));
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res = -1;
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}
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}
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return res;
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}
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int delete_dir_contents_fd(int dfd, const char *name)
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{
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int fd, res;
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DIR *d;
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fd = openat(dfd, name, O_RDONLY | O_DIRECTORY);
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if (fd < 0) {
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ALOGE("Couldn't openat %s: %s\n", name, strerror(errno));
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return -1;
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}
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d = fdopendir(fd);
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if (d == NULL) {
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ALOGE("Couldn't fdopendir %s: %s\n", name, strerror(errno));
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close(fd);
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return -1;
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}
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res = _delete_dir_contents(d, 0);
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closedir(d);
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return res;
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}
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int lookup_media_dir(char basepath[PATH_MAX], const char *dir)
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{
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DIR *d;
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struct dirent *de;
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struct stat s;
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char* dirpos = basepath + strlen(basepath);
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if ((*(dirpos-1)) != '/') {
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*dirpos = '/';
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dirpos++;
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}
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CACHE_NOISY(ALOGI("Looking up %s in %s\n", dir, basepath));
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// Verify the path won't extend beyond our buffer, to avoid
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// repeated checking later.
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if ((dirpos-basepath+strlen(dir)) >= (PATH_MAX-1)) {
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ALOGW("Path exceeds limit: %s%s", basepath, dir);
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return -1;
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}
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// First, can we find this directory with the case that is given?
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strcpy(dirpos, dir);
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if (stat(basepath, &s) >= 0) {
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CACHE_NOISY(ALOGI("Found direct: %s\n", basepath));
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return 0;
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}
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// Not found with that case... search through all entries to find
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// one that matches regardless of case.
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*dirpos = 0;
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d = opendir(basepath);
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if (d == NULL) {
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return -1;
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}
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while ((de = readdir(d))) {
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if (strcasecmp(de->d_name, dir) == 0) {
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strcpy(dirpos, de->d_name);
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closedir(d);
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CACHE_NOISY(ALOGI("Found search: %s\n", basepath));
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return 0;
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}
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}
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ALOGW("Couldn't find %s in %s", dir, basepath);
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closedir(d);
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return -1;
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}
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int64_t data_disk_free()
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{
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struct statfs sfs;
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if (statfs(android_data_dir.path, &sfs) == 0) {
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return sfs.f_bavail * sfs.f_bsize;
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} else {
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ALOGE("Couldn't statfs %s: %s\n", android_data_dir.path, strerror(errno));
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return -1;
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}
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}
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cache_t* start_cache_collection()
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{
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cache_t* cache = (cache_t*)calloc(1, sizeof(cache_t));
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return cache;
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}
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#define CACHE_BLOCK_SIZE (512*1024)
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static void* _cache_malloc(cache_t* cache, size_t len)
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{
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len = (len+3)&~3;
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if (len > (CACHE_BLOCK_SIZE/2)) {
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// It doesn't make sense to try to put this allocation into one
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// of our blocks, because it is so big. Instead, make a new dedicated
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// block for it.
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int8_t* res = (int8_t*)malloc(len+sizeof(void*));
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if (res == NULL) {
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return NULL;
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}
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CACHE_NOISY(ALOGI("Allocated large cache mem block: %p size %d", res, len));
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// Link it into our list of blocks, not disrupting the current one.
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if (cache->memBlocks == NULL) {
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*(void**)res = NULL;
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cache->memBlocks = res;
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} else {
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*(void**)res = *(void**)cache->memBlocks;
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*(void**)cache->memBlocks = res;
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}
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return res + sizeof(void*);
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}
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int8_t* res = cache->curMemBlockAvail;
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int8_t* nextPos = res + len;
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if (cache->memBlocks == NULL || nextPos > cache->curMemBlockEnd) {
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int8_t* newBlock = malloc(CACHE_BLOCK_SIZE);
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if (newBlock == NULL) {
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return NULL;
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}
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CACHE_NOISY(ALOGI("Allocated new cache mem block: %p", newBlock));
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*(void**)newBlock = cache->memBlocks;
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cache->memBlocks = newBlock;
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res = cache->curMemBlockAvail = newBlock + sizeof(void*);
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cache->curMemBlockEnd = newBlock + CACHE_BLOCK_SIZE;
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nextPos = res + len;
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}
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CACHE_NOISY(ALOGI("cache_malloc: ret %p size %d, block=%p, nextPos=%p",
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res, len, cache->memBlocks, nextPos));
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cache->curMemBlockAvail = nextPos;
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return res;
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}
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static void* _cache_realloc(cache_t* cache, void* cur, size_t origLen, size_t len)
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{
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// This isn't really a realloc, but it is good enough for our purposes here.
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void* alloc = _cache_malloc(cache, len);
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if (alloc != NULL && cur != NULL) {
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memcpy(alloc, cur, origLen < len ? origLen : len);
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}
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return alloc;
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}
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static void _inc_num_cache_collected(cache_t* cache)
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{
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cache->numCollected++;
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if ((cache->numCollected%20000) == 0) {
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ALOGI("Collected cache so far: %zd directories, %zd files",
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cache->numDirs, cache->numFiles);
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}
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}
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static cache_dir_t* _add_cache_dir_t(cache_t* cache, cache_dir_t* parent, const char *name)
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{
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size_t nameLen = strlen(name);
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cache_dir_t* dir = (cache_dir_t*)_cache_malloc(cache, sizeof(cache_dir_t)+nameLen+1);
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if (dir != NULL) {
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dir->parent = parent;
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dir->childCount = 0;
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dir->hiddenCount = 0;
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dir->deleted = 0;
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strcpy(dir->name, name);
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if (cache->numDirs >= cache->availDirs) {
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size_t newAvail = cache->availDirs < 1000 ? 1000 : cache->availDirs*2;
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cache_dir_t** newDirs = (cache_dir_t**)_cache_realloc(cache, cache->dirs,
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cache->availDirs*sizeof(cache_dir_t*), newAvail*sizeof(cache_dir_t*));
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if (newDirs == NULL) {
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ALOGE("Failure growing cache dirs array for %s\n", name);
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return NULL;
|
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}
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cache->availDirs = newAvail;
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cache->dirs = newDirs;
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}
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cache->dirs[cache->numDirs] = dir;
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cache->numDirs++;
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if (parent != NULL) {
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parent->childCount++;
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}
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_inc_num_cache_collected(cache);
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} else {
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ALOGE("Failure allocating cache_dir_t for %s\n", name);
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}
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return dir;
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}
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|
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static cache_file_t* _add_cache_file_t(cache_t* cache, cache_dir_t* dir, time_t modTime,
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const char *name)
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{
|
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size_t nameLen = strlen(name);
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cache_file_t* file = (cache_file_t*)_cache_malloc(cache, sizeof(cache_file_t)+nameLen+1);
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if (file != NULL) {
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file->dir = dir;
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file->modTime = modTime;
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strcpy(file->name, name);
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if (cache->numFiles >= cache->availFiles) {
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size_t newAvail = cache->availFiles < 1000 ? 1000 : cache->availFiles*2;
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cache_file_t** newFiles = (cache_file_t**)_cache_realloc(cache, cache->files,
|
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cache->availFiles*sizeof(cache_file_t*), newAvail*sizeof(cache_file_t*));
|
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if (newFiles == NULL) {
|
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ALOGE("Failure growing cache file array for %s\n", name);
|
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return NULL;
|
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}
|
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cache->availFiles = newAvail;
|
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cache->files = newFiles;
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|
}
|
|
CACHE_NOISY(ALOGI("Setting file %p at position %d in array %p", file,
|
|
cache->numFiles, cache->files));
|
|
cache->files[cache->numFiles] = file;
|
|
cache->numFiles++;
|
|
dir->childCount++;
|
|
_inc_num_cache_collected(cache);
|
|
} else {
|
|
ALOGE("Failure allocating cache_file_t for %s\n", name);
|
|
}
|
|
return file;
|
|
}
|
|
|
|
static int _add_cache_files(cache_t *cache, cache_dir_t *parentDir, const char *dirName,
|
|
DIR* dir, char *pathBase, char *pathPos, size_t pathAvailLen)
|
|
{
|
|
struct dirent *de;
|
|
cache_dir_t* cacheDir = NULL;
|
|
int dfd;
|
|
|
|
CACHE_NOISY(ALOGI("_add_cache_files: parent=%p dirName=%s dir=%p pathBase=%s",
|
|
parentDir, dirName, dir, pathBase));
|
|
|
|
dfd = dirfd(dir);
|
|
|
|
if (dfd < 0) return 0;
|
|
|
|
// Sub-directories always get added to the data structure, so if they
|
|
// are empty we will know about them to delete them later.
|
|
cacheDir = _add_cache_dir_t(cache, parentDir, dirName);
|
|
|
|
while ((de = readdir(dir))) {
|
|
const char *name = de->d_name;
|
|
|
|
if (de->d_type == DT_DIR) {
|
|
int subfd;
|
|
DIR *subdir;
|
|
|
|
/* always skip "." and ".." */
|
|
if (name[0] == '.') {
|
|
if (name[1] == 0) continue;
|
|
if ((name[1] == '.') && (name[2] == 0)) continue;
|
|
}
|
|
|
|
subfd = openat(dfd, name, O_RDONLY | O_DIRECTORY);
|
|
if (subfd < 0) {
|
|
ALOGE("Couldn't openat %s: %s\n", name, strerror(errno));
|
|
continue;
|
|
}
|
|
subdir = fdopendir(subfd);
|
|
if (subdir == NULL) {
|
|
ALOGE("Couldn't fdopendir %s: %s\n", name, strerror(errno));
|
|
close(subfd);
|
|
continue;
|
|
}
|
|
if (cacheDir == NULL) {
|
|
cacheDir = _add_cache_dir_t(cache, parentDir, dirName);
|
|
}
|
|
if (cacheDir != NULL) {
|
|
// Update pathBase for the new path... this may change dirName
|
|
// if that is also pointing to the path, but we are done with it
|
|
// now.
|
|
size_t finallen = snprintf(pathPos, pathAvailLen, "/%s", name);
|
|
CACHE_NOISY(ALOGI("Collecting dir %s\n", pathBase));
|
|
if (finallen < pathAvailLen) {
|
|
_add_cache_files(cache, cacheDir, name, subdir, pathBase,
|
|
pathPos+finallen, pathAvailLen-finallen);
|
|
} else {
|
|
// Whoops, the final path is too long! We'll just delete
|
|
// this directory.
|
|
ALOGW("Cache dir %s truncated in path %s; deleting dir\n",
|
|
name, pathBase);
|
|
_delete_dir_contents(subdir, NULL);
|
|
if (unlinkat(dfd, name, AT_REMOVEDIR) < 0) {
|
|
ALOGE("Couldn't unlinkat %s: %s\n", name, strerror(errno));
|
|
}
|
|
}
|
|
}
|
|
closedir(subdir);
|
|
} else if (de->d_type == DT_REG) {
|
|
// Skip files that start with '.'; they will be deleted if
|
|
// their entire directory is deleted. This allows for metadata
|
|
// like ".nomedia" to remain in the directory until the entire
|
|
// directory is deleted.
|
|
if (cacheDir == NULL) {
|
|
cacheDir = _add_cache_dir_t(cache, parentDir, dirName);
|
|
}
|
|
if (name[0] == '.') {
|
|
cacheDir->hiddenCount++;
|
|
continue;
|
|
}
|
|
if (cacheDir != NULL) {
|
|
// Build final full path for file... this may change dirName
|
|
// if that is also pointing to the path, but we are done with it
|
|
// now.
|
|
size_t finallen = snprintf(pathPos, pathAvailLen, "/%s", name);
|
|
CACHE_NOISY(ALOGI("Collecting file %s\n", pathBase));
|
|
if (finallen < pathAvailLen) {
|
|
struct stat s;
|
|
if (stat(pathBase, &s) >= 0) {
|
|
_add_cache_file_t(cache, cacheDir, s.st_mtime, name);
|
|
} else {
|
|
ALOGW("Unable to stat cache file %s; deleting\n", pathBase);
|
|
if (unlink(pathBase) < 0) {
|
|
ALOGE("Couldn't unlink %s: %s\n", pathBase, strerror(errno));
|
|
}
|
|
}
|
|
} else {
|
|
// Whoops, the final path is too long! We'll just delete
|
|
// this file.
|
|
ALOGW("Cache file %s truncated in path %s; deleting\n",
|
|
name, pathBase);
|
|
if (unlinkat(dfd, name, 0) < 0) {
|
|
*pathPos = 0;
|
|
ALOGE("Couldn't unlinkat %s in %s: %s\n", name, pathBase,
|
|
strerror(errno));
|
|
}
|
|
}
|
|
}
|
|
} else {
|
|
cacheDir->hiddenCount++;
|
|
}
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
void add_cache_files(cache_t* cache, const char *basepath, const char *cachedir)
|
|
{
|
|
DIR *d;
|
|
struct dirent *de;
|
|
char dirname[PATH_MAX];
|
|
|
|
CACHE_NOISY(ALOGI("add_cache_files: base=%s cachedir=%s\n", basepath, cachedir));
|
|
|
|
d = opendir(basepath);
|
|
if (d == NULL) {
|
|
return;
|
|
}
|
|
|
|
while ((de = readdir(d))) {
|
|
if (de->d_type == DT_DIR) {
|
|
DIR* subdir;
|
|
const char *name = de->d_name;
|
|
char* pathpos;
|
|
|
|
/* always skip "." and ".." */
|
|
if (name[0] == '.') {
|
|
if (name[1] == 0) continue;
|
|
if ((name[1] == '.') && (name[2] == 0)) continue;
|
|
}
|
|
|
|
strcpy(dirname, basepath);
|
|
pathpos = dirname + strlen(dirname);
|
|
if ((*(pathpos-1)) != '/') {
|
|
*pathpos = '/';
|
|
pathpos++;
|
|
*pathpos = 0;
|
|
}
|
|
if (cachedir != NULL) {
|
|
snprintf(pathpos, sizeof(dirname)-(pathpos-dirname), "%s/%s", name, cachedir);
|
|
} else {
|
|
snprintf(pathpos, sizeof(dirname)-(pathpos-dirname), "%s", name);
|
|
}
|
|
CACHE_NOISY(ALOGI("Adding cache files from dir: %s\n", dirname));
|
|
subdir = opendir(dirname);
|
|
if (subdir != NULL) {
|
|
size_t dirnameLen = strlen(dirname);
|
|
_add_cache_files(cache, NULL, dirname, subdir, dirname, dirname+dirnameLen,
|
|
PATH_MAX - dirnameLen);
|
|
closedir(subdir);
|
|
}
|
|
}
|
|
}
|
|
|
|
closedir(d);
|
|
}
|
|
|
|
static char *create_dir_path(char path[PATH_MAX], cache_dir_t* dir)
|
|
{
|
|
char *pos = path;
|
|
if (dir->parent != NULL) {
|
|
pos = create_dir_path(path, dir->parent);
|
|
}
|
|
// Note that we don't need to worry about going beyond the buffer,
|
|
// since when we were constructing the cache entries our maximum
|
|
// buffer size for full paths was PATH_MAX.
|
|
strcpy(pos, dir->name);
|
|
pos += strlen(pos);
|
|
*pos = '/';
|
|
pos++;
|
|
*pos = 0;
|
|
return pos;
|
|
}
|
|
|
|
static void delete_cache_dir(char path[PATH_MAX], cache_dir_t* dir)
|
|
{
|
|
if (dir->parent != NULL) {
|
|
create_dir_path(path, dir);
|
|
ALOGI("DEL DIR %s\n", path);
|
|
if (dir->hiddenCount <= 0) {
|
|
if (rmdir(path)) {
|
|
ALOGE("Couldn't rmdir %s: %s\n", path, strerror(errno));
|
|
return;
|
|
}
|
|
} else {
|
|
// The directory contains hidden files so we need to delete
|
|
// them along with the directory itself.
|
|
if (delete_dir_contents(path, 1, NULL)) {
|
|
return;
|
|
}
|
|
}
|
|
dir->parent->childCount--;
|
|
dir->deleted = 1;
|
|
if (dir->parent->childCount <= 0) {
|
|
delete_cache_dir(path, dir->parent);
|
|
}
|
|
} else if (dir->hiddenCount > 0) {
|
|
// This is a root directory, but it has hidden files. Get rid of
|
|
// all of those files, but not the directory itself.
|
|
create_dir_path(path, dir);
|
|
ALOGI("DEL CONTENTS %s\n", path);
|
|
delete_dir_contents(path, 0, NULL);
|
|
}
|
|
}
|
|
|
|
static int cache_modtime_sort(const void *lhsP, const void *rhsP)
|
|
{
|
|
const cache_file_t *lhs = *(const cache_file_t**)lhsP;
|
|
const cache_file_t *rhs = *(const cache_file_t**)rhsP;
|
|
return lhs->modTime < rhs->modTime ? -1 : (lhs->modTime > rhs->modTime ? 1 : 0);
|
|
}
|
|
|
|
void clear_cache_files(cache_t* cache, int64_t free_size)
|
|
{
|
|
size_t i;
|
|
int skip = 0;
|
|
char path[PATH_MAX];
|
|
|
|
ALOGI("Collected cache files: %zd directories, %zd files",
|
|
cache->numDirs, cache->numFiles);
|
|
|
|
CACHE_NOISY(ALOGI("Sorting files..."));
|
|
qsort(cache->files, cache->numFiles, sizeof(cache_file_t*),
|
|
cache_modtime_sort);
|
|
|
|
CACHE_NOISY(ALOGI("Cleaning empty directories..."));
|
|
for (i=cache->numDirs; i>0; i--) {
|
|
cache_dir_t* dir = cache->dirs[i-1];
|
|
if (dir->childCount <= 0 && !dir->deleted) {
|
|
delete_cache_dir(path, dir);
|
|
}
|
|
}
|
|
|
|
CACHE_NOISY(ALOGI("Trimming files..."));
|
|
for (i=0; i<cache->numFiles; i++) {
|
|
skip++;
|
|
if (skip > 10) {
|
|
if (data_disk_free() > free_size) {
|
|
return;
|
|
}
|
|
skip = 0;
|
|
}
|
|
cache_file_t* file = cache->files[i];
|
|
strcpy(create_dir_path(path, file->dir), file->name);
|
|
ALOGI("DEL (mod %d) %s\n", (int)file->modTime, path);
|
|
if (unlink(path) < 0) {
|
|
ALOGE("Couldn't unlink %s: %s\n", path, strerror(errno));
|
|
}
|
|
file->dir->childCount--;
|
|
if (file->dir->childCount <= 0) {
|
|
delete_cache_dir(path, file->dir);
|
|
}
|
|
}
|
|
}
|
|
|
|
void finish_cache_collection(cache_t* cache)
|
|
{
|
|
CACHE_NOISY(size_t i;)
|
|
|
|
CACHE_NOISY(ALOGI("clear_cache_files: %d dirs, %d files\n", cache->numDirs, cache->numFiles));
|
|
CACHE_NOISY(
|
|
for (i=0; i<cache->numDirs; i++) {
|
|
cache_dir_t* dir = cache->dirs[i];
|
|
ALOGI("dir #%d: %p %s parent=%p\n", i, dir, dir->name, dir->parent);
|
|
})
|
|
CACHE_NOISY(
|
|
for (i=0; i<cache->numFiles; i++) {
|
|
cache_file_t* file = cache->files[i];
|
|
ALOGI("file #%d: %p %s time=%d dir=%p\n", i, file, file->name,
|
|
(int)file->modTime, file->dir);
|
|
})
|
|
void* block = cache->memBlocks;
|
|
while (block != NULL) {
|
|
void* nextBlock = *(void**)block;
|
|
CACHE_NOISY(ALOGI("Freeing cache mem block: %p", block));
|
|
free(block);
|
|
block = nextBlock;
|
|
}
|
|
free(cache);
|
|
}
|
|
|
|
/**
|
|
* Validate that the path is valid in the context of the provided directory.
|
|
* The path is allowed to have at most one subdirectory and no indirections
|
|
* to top level directories (i.e. have "..").
|
|
*/
|
|
static int validate_path(const dir_rec_t* dir, const char* path) {
|
|
size_t dir_len = dir->len;
|
|
const char* subdir = strchr(path + dir_len, '/');
|
|
|
|
// Only allow the path to have at most one subdirectory.
|
|
if (subdir != NULL) {
|
|
++subdir;
|
|
if (strchr(subdir, '/') != NULL) {
|
|
ALOGE("invalid apk path '%s' (subdir?)\n", path);
|
|
return -1;
|
|
}
|
|
}
|
|
|
|
// Directories can't have a period directly after the directory markers to prevent "..".
|
|
if ((path[dir_len] == '.') || ((subdir != NULL) && (*subdir == '.'))) {
|
|
ALOGE("invalid apk path '%s' (trickery)\n", path);
|
|
return -1;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
/**
|
|
* Checks whether a path points to a system app (.apk file). Returns 0
|
|
* if it is a system app or -1 if it is not.
|
|
*/
|
|
int validate_system_app_path(const char* path) {
|
|
size_t i;
|
|
|
|
for (i = 0; i < android_system_dirs.count; i++) {
|
|
const size_t dir_len = android_system_dirs.dirs[i].len;
|
|
if (!strncmp(path, android_system_dirs.dirs[i].path, dir_len)) {
|
|
return validate_path(android_system_dirs.dirs + i, path);
|
|
}
|
|
}
|
|
|
|
return -1;
|
|
}
|
|
|
|
/**
|
|
* Get the contents of a environment variable that contains a path. Caller
|
|
* owns the string that is inserted into the directory record. Returns
|
|
* 0 on success and -1 on error.
|
|
*/
|
|
int get_path_from_env(dir_rec_t* rec, const char* var) {
|
|
const char* path = getenv(var);
|
|
int ret = get_path_from_string(rec, path);
|
|
if (ret < 0) {
|
|
ALOGW("Problem finding value for environment variable %s\n", var);
|
|
}
|
|
return ret;
|
|
}
|
|
|
|
/**
|
|
* Puts the string into the record as a directory. Appends '/' to the end
|
|
* of all paths. Caller owns the string that is inserted into the directory
|
|
* record. A null value will result in an error.
|
|
*
|
|
* Returns 0 on success and -1 on error.
|
|
*/
|
|
int get_path_from_string(dir_rec_t* rec, const char* path) {
|
|
if (path == NULL) {
|
|
return -1;
|
|
} else {
|
|
const size_t path_len = strlen(path);
|
|
if (path_len <= 0) {
|
|
return -1;
|
|
}
|
|
|
|
// Make sure path is absolute.
|
|
if (path[0] != '/') {
|
|
return -1;
|
|
}
|
|
|
|
if (path[path_len - 1] == '/') {
|
|
// Path ends with a forward slash. Make our own copy.
|
|
|
|
rec->path = strdup(path);
|
|
if (rec->path == NULL) {
|
|
return -1;
|
|
}
|
|
|
|
rec->len = path_len;
|
|
} else {
|
|
// Path does not end with a slash. Generate a new string.
|
|
char *dst;
|
|
|
|
// Add space for slash and terminating null.
|
|
size_t dst_size = path_len + 2;
|
|
|
|
rec->path = malloc(dst_size);
|
|
if (rec->path == NULL) {
|
|
return -1;
|
|
}
|
|
|
|
dst = rec->path;
|
|
|
|
if (append_and_increment(&dst, path, &dst_size) < 0
|
|
|| append_and_increment(&dst, "/", &dst_size)) {
|
|
ALOGE("Error canonicalizing path");
|
|
return -1;
|
|
}
|
|
|
|
rec->len = dst - rec->path;
|
|
}
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
int copy_and_append(dir_rec_t* dst, const dir_rec_t* src, const char* suffix) {
|
|
dst->len = src->len + strlen(suffix);
|
|
const size_t dstSize = dst->len + 1;
|
|
dst->path = (char*) malloc(dstSize);
|
|
|
|
if (dst->path == NULL
|
|
|| snprintf(dst->path, dstSize, "%s%s", src->path, suffix)
|
|
!= (ssize_t) dst->len) {
|
|
ALOGE("Could not allocate memory to hold appended path; aborting\n");
|
|
return -1;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
/**
|
|
* Check whether path points to a valid path for an APK file. Only one level of
|
|
* subdirectory names is allowed. Returns -1 when an invalid path is encountered
|
|
* and 0 when a valid path is encountered.
|
|
*/
|
|
int validate_apk_path(const char *path)
|
|
{
|
|
const dir_rec_t* dir = NULL;
|
|
|
|
if (!strncmp(path, android_app_dir.path, android_app_dir.len)) {
|
|
dir = &android_app_dir;
|
|
} else if (!strncmp(path, android_app_private_dir.path, android_app_private_dir.len)) {
|
|
dir = &android_app_private_dir;
|
|
} else if (!strncmp(path, android_asec_dir.path, android_asec_dir.len)) {
|
|
dir = &android_asec_dir;
|
|
} else {
|
|
ALOGE("invalid apk path '%s' (bad prefix)\n", path);
|
|
return -1;
|
|
}
|
|
|
|
return validate_path(dir, path);
|
|
}
|
|
|
|
int append_and_increment(char** dst, const char* src, size_t* dst_size) {
|
|
ssize_t ret = strlcpy(*dst, src, *dst_size);
|
|
if (ret < 0 || (size_t) ret >= *dst_size) {
|
|
return -1;
|
|
}
|
|
*dst += ret;
|
|
*dst_size -= ret;
|
|
return 0;
|
|
}
|
|
|
|
char *build_string2(char *s1, char *s2) {
|
|
if (s1 == NULL || s2 == NULL) return NULL;
|
|
|
|
int len_s1 = strlen(s1);
|
|
int len_s2 = strlen(s2);
|
|
int len = len_s1 + len_s2 + 1;
|
|
char *result = malloc(len);
|
|
if (result == NULL) return NULL;
|
|
|
|
strcpy(result, s1);
|
|
strcpy(result + len_s1, s2);
|
|
|
|
return result;
|
|
}
|
|
|
|
char *build_string3(char *s1, char *s2, char *s3) {
|
|
if (s1 == NULL || s2 == NULL || s3 == NULL) return NULL;
|
|
|
|
int len_s1 = strlen(s1);
|
|
int len_s2 = strlen(s2);
|
|
int len_s3 = strlen(s3);
|
|
int len = len_s1 + len_s2 + len_s3 + 1;
|
|
char *result = malloc(len);
|
|
if (result == NULL) return NULL;
|
|
|
|
strcpy(result, s1);
|
|
strcpy(result + len_s1, s2);
|
|
strcpy(result + len_s1 + len_s2, s3);
|
|
|
|
return result;
|
|
}
|
|
|
|
/* Ensure that /data/media directories are prepared for given user. */
|
|
int ensure_media_user_dirs(userid_t userid) {
|
|
char media_user_path[PATH_MAX];
|
|
|
|
// Ensure /data/media/<userid> exists
|
|
create_user_media_path(media_user_path, userid);
|
|
if (fs_prepare_dir(media_user_path, 0770, AID_MEDIA_RW, AID_MEDIA_RW) == -1) {
|
|
return -1;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
int ensure_config_user_dirs(userid_t userid) {
|
|
char config_user_path[PATH_MAX];
|
|
|
|
// writable by system, readable by any app within the same user
|
|
const int uid = (userid * AID_USER) + AID_SYSTEM;
|
|
const int gid = (userid * AID_USER) + AID_EVERYBODY;
|
|
|
|
// Ensure /data/misc/user/<userid> exists
|
|
create_user_config_path(config_user_path, userid);
|
|
if (fs_prepare_dir(config_user_path, 0750, uid, gid) == -1) {
|
|
return -1;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
int create_profile_file(const char *pkgname, gid_t gid) {
|
|
const char *profile_dir = DALVIK_CACHE_PREFIX "profiles";
|
|
char profile_file[PKG_PATH_MAX];
|
|
|
|
snprintf(profile_file, sizeof(profile_file), "%s/%s", profile_dir, pkgname);
|
|
|
|
// The 'system' user needs to be able to read the profile to determine if dex2oat
|
|
// needs to be run. This is done in dalvik.system.DexFile.isDexOptNeededInternal(). So
|
|
// we assign ownership to AID_SYSTEM and ensure it's not world-readable.
|
|
|
|
int fd = open(profile_file, O_WRONLY | O_CREAT | O_NOFOLLOW | O_CLOEXEC, 0660);
|
|
|
|
// Always set the uid/gid/permissions. The file could have been previously created
|
|
// with different permissions.
|
|
if (fd >= 0) {
|
|
if (fchown(fd, AID_SYSTEM, gid) < 0) {
|
|
ALOGE("cannot chown profile file '%s': %s\n", profile_file, strerror(errno));
|
|
close(fd);
|
|
unlink(profile_file);
|
|
return -1;
|
|
}
|
|
|
|
if (fchmod(fd, 0660) < 0) {
|
|
ALOGE("cannot chmod profile file '%s': %s\n", profile_file, strerror(errno));
|
|
close(fd);
|
|
unlink(profile_file);
|
|
return -1;
|
|
}
|
|
close(fd);
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
void remove_profile_file(const char *pkgname) {
|
|
char profile_file[PKG_PATH_MAX];
|
|
snprintf(profile_file, sizeof(profile_file), "%s/%s", DALVIK_CACHE_PREFIX "profiles", pkgname);
|
|
unlink(profile_file);
|
|
}
|