summaryrefslogtreecommitdiffstats
path: root/cmds/installd/utils.c
diff options
context:
space:
mode:
Diffstat (limited to 'cmds/installd/utils.c')
-rw-r--r--cmds/installd/utils.c1006
1 files changed, 0 insertions, 1006 deletions
diff --git a/cmds/installd/utils.c b/cmds/installd/utils.c
deleted file mode 100644
index 625a35e..0000000
--- a/cmds/installd/utils.c
+++ /dev/null
@@ -1,1006 +0,0 @@
-/*
-** Copyright 2008, The Android Open Source Project
-**
-** Licensed under the Apache License, Version 2.0 (the "License");
-** you may not use this file except in compliance with the License.
-** You may obtain a copy of the License at
-**
-** http://www.apache.org/licenses/LICENSE-2.0
-**
-** Unless required by applicable law or agreed to in writing, software
-** distributed under the License is distributed on an "AS IS" BASIS,
-** WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-** See the License for the specific language governing permissions and
-** limitations under the License.
-*/
-
-#include "installd.h"
-
-#define CACHE_NOISY(x) //x
-
-int create_pkg_path_in_dir(char path[PKG_PATH_MAX],
- const dir_rec_t* dir,
- const char* pkgname,
- const char* postfix)
-{
- const size_t postfix_len = strlen(postfix);
-
- const size_t pkgname_len = strlen(pkgname);
- if (pkgname_len > PKG_NAME_MAX) {
- return -1;
- }
-
- if (is_valid_package_name(pkgname) < 0) {
- return -1;
- }
-
- if ((pkgname_len + dir->len + postfix_len) >= PKG_PATH_MAX) {
- return -1;
- }
-
- char *dst = path;
- size_t dst_size = PKG_PATH_MAX;
-
- if (append_and_increment(&dst, dir->path, &dst_size) < 0
- || append_and_increment(&dst, pkgname, &dst_size) < 0
- || append_and_increment(&dst, postfix, &dst_size) < 0) {
- ALOGE("Error building APK path");
- return -1;
- }
-
- return 0;
-}
-
-/**
- * Create the package path name for a given package name with a postfix for
- * a certain persona. Returns 0 on success, and -1 on failure.
- */
-int create_pkg_path(char path[PKG_PATH_MAX],
- const char *pkgname,
- const char *postfix,
- uid_t persona)
-{
- size_t uid_len;
- char* persona_prefix;
- if (persona == 0) {
- persona_prefix = PRIMARY_USER_PREFIX;
- uid_len = 0;
- } else {
- persona_prefix = SECONDARY_USER_PREFIX;
- uid_len = snprintf(NULL, 0, "%d", persona);
- }
-
- const size_t prefix_len = android_data_dir.len + strlen(persona_prefix) + uid_len + 1 /*slash*/;
- char prefix[prefix_len + 1];
-
- char *dst = prefix;
- size_t dst_size = sizeof(prefix);
-
- if (append_and_increment(&dst, android_data_dir.path, &dst_size) < 0
- || append_and_increment(&dst, persona_prefix, &dst_size) < 0) {
- ALOGE("Error building prefix for APK path");
- return -1;
- }
-
- if (persona != 0) {
- int ret = snprintf(dst, dst_size, "%d/", persona);
- if (ret < 0 || (size_t) ret != uid_len + 1) {
- ALOGW("Error appending UID to APK path");
- return -1;
- }
- }
-
- dir_rec_t dir;
- dir.path = prefix;
- dir.len = prefix_len;
-
- return create_pkg_path_in_dir(path, &dir, pkgname, postfix);
-}
-
-/**
- * Create the path name for user data for a certain persona.
- * Returns 0 on success, and -1 on failure.
- */
-int create_persona_path(char path[PKG_PATH_MAX],
- uid_t persona)
-{
- size_t uid_len;
- char* persona_prefix;
- if (persona == 0) {
- persona_prefix = PRIMARY_USER_PREFIX;
- uid_len = 0;
- } else {
- persona_prefix = SECONDARY_USER_PREFIX;
- uid_len = snprintf(NULL, 0, "%d/", persona);
- }
-
- char *dst = path;
- size_t dst_size = PKG_PATH_MAX;
-
- if (append_and_increment(&dst, android_data_dir.path, &dst_size) < 0
- || append_and_increment(&dst, persona_prefix, &dst_size) < 0) {
- ALOGE("Error building prefix for user path");
- return -1;
- }
-
- if (persona != 0) {
- if (dst_size < uid_len + 1) {
- ALOGE("Error building user path");
- return -1;
- }
- int ret = snprintf(dst, dst_size, "%d/", persona);
- if (ret < 0 || (size_t) ret != uid_len) {
- ALOGE("Error appending persona id to path");
- return -1;
- }
- }
- return 0;
-}
-
-/**
- * Create the path name for media for a certain persona.
- * Returns 0 on success, and -1 on failure.
- */
-int create_persona_media_path(char path[PATH_MAX], userid_t userid) {
- if (snprintf(path, PATH_MAX, "%s%d", android_media_dir.path, userid) > PATH_MAX) {
- return -1;
- }
- return 0;
-}
-
-int create_move_path(char path[PKG_PATH_MAX],
- const char* pkgname,
- const char* leaf,
- uid_t persona)
-{
- if ((android_data_dir.len + strlen(PRIMARY_USER_PREFIX) + strlen(pkgname) + strlen(leaf) + 1)
- >= PKG_PATH_MAX) {
- return -1;
- }
-
- sprintf(path, "%s%s%s/%s", android_data_dir.path, PRIMARY_USER_PREFIX, pkgname, leaf);
- return 0;
-}
-
-/**
- * Checks whether the package name is valid. Returns -1 on error and
- * 0 on success.
- */
-int is_valid_package_name(const char* pkgname) {
- const char *x = pkgname;
- int alpha = -1;
-
- while (*x) {
- if (isalnum(*x) || (*x == '_')) {
- /* alphanumeric or underscore are fine */
- } else if (*x == '.') {
- if ((x == pkgname) || (x[1] == '.') || (x[1] == 0)) {
- /* periods must not be first, last, or doubled */
- ALOGE("invalid package name '%s'\n", pkgname);
- return -1;
- }
- } else if (*x == '-') {
- /* Suffix -X is fine to let versioning of packages.
- But whatever follows should be alphanumeric.*/
- alpha = 1;
- } else {
- /* anything not A-Z, a-z, 0-9, _, or . is invalid */
- ALOGE("invalid package name '%s'\n", pkgname);
- return -1;
- }
-
- x++;
- }
-
- if (alpha == 1) {
- // Skip current character
- x++;
- while (*x) {
- if (!isalnum(*x)) {
- ALOGE("invalid package name '%s' should include only numbers after -\n", pkgname);
- return -1;
- }
- x++;
- }
- }
-
- return 0;
-}
-
-static int _delete_dir_contents(DIR *d, const char *ignore)
-{
- int result = 0;
- struct dirent *de;
- int dfd;
-
- dfd = dirfd(d);
-
- if (dfd < 0) return -1;
-
- while ((de = readdir(d))) {
- const char *name = de->d_name;
-
- /* skip the ignore name if provided */
- if (ignore && !strcmp(name, ignore)) continue;
-
- if (de->d_type == DT_DIR) {
- int r, 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));
- result = -1;
- continue;
- }
- subdir = fdopendir(subfd);
- if (subdir == NULL) {
- ALOGE("Couldn't fdopendir %s: %s\n", name, strerror(errno));
- close(subfd);
- result = -1;
- continue;
- }
- if (_delete_dir_contents(subdir, 0)) {
- result = -1;
- }
- closedir(subdir);
- if (unlinkat(dfd, name, AT_REMOVEDIR) < 0) {
- ALOGE("Couldn't unlinkat %s: %s\n", name, strerror(errno));
- result = -1;
- }
- } else {
- if (unlinkat(dfd, name, 0) < 0) {
- ALOGE("Couldn't unlinkat %s: %s\n", name, strerror(errno));
- result = -1;
- }
- }
- }
-
- return result;
-}
-
-int delete_dir_contents(const char *pathname,
- int also_delete_dir,
- const char *ignore)
-{
- int res = 0;
- DIR *d;
-
- d = opendir(pathname);
- if (d == NULL) {
- ALOGE("Couldn't opendir %s: %s\n", pathname, strerror(errno));
- return -errno;
- }
- res = _delete_dir_contents(d, ignore);
- closedir(d);
- if (also_delete_dir) {
- if (rmdir(pathname)) {
- ALOGE("Couldn't rmdir %s: %s\n", pathname, strerror(errno));
- res = -1;
- }
- }
- return res;
-}
-
-int delete_dir_contents_fd(int dfd, const char *name)
-{
- int fd, res;
- DIR *d;
-
- fd = openat(dfd, name, O_RDONLY | O_DIRECTORY);
- if (fd < 0) {
- ALOGE("Couldn't openat %s: %s\n", name, strerror(errno));
- return -1;
- }
- d = fdopendir(fd);
- if (d == NULL) {
- ALOGE("Couldn't fdopendir %s: %s\n", name, strerror(errno));
- close(fd);
- return -1;
- }
- res = _delete_dir_contents(d, 0);
- closedir(d);
- return res;
-}
-
-int lookup_media_dir(char basepath[PATH_MAX], const char *dir)
-{
- DIR *d;
- struct dirent *de;
- struct stat s;
- char* dirpos = basepath + strlen(basepath);
-
- if ((*(dirpos-1)) != '/') {
- *dirpos = '/';
- dirpos++;
- }
-
- CACHE_NOISY(ALOGI("Looking up %s in %s\n", dir, basepath));
- // Verify the path won't extend beyond our buffer, to avoid
- // repeated checking later.
- if ((dirpos-basepath+strlen(dir)) >= (PATH_MAX-1)) {
- ALOGW("Path exceeds limit: %s%s", basepath, dir);
- return -1;
- }
-
- // First, can we find this directory with the case that is given?
- strcpy(dirpos, dir);
- if (stat(basepath, &s) >= 0) {
- CACHE_NOISY(ALOGI("Found direct: %s\n", basepath));
- return 0;
- }
-
- // Not found with that case... search through all entries to find
- // one that matches regardless of case.
- *dirpos = 0;
-
- d = opendir(basepath);
- if (d == NULL) {
- return -1;
- }
-
- while ((de = readdir(d))) {
- if (strcasecmp(de->d_name, dir) == 0) {
- strcpy(dirpos, de->d_name);
- closedir(d);
- CACHE_NOISY(ALOGI("Found search: %s\n", basepath));
- return 0;
- }
- }
-
- ALOGW("Couldn't find %s in %s", dir, basepath);
- closedir(d);
- return -1;
-}
-
-int64_t data_disk_free()
-{
- struct statfs sfs;
- if (statfs(android_data_dir.path, &sfs) == 0) {
- return sfs.f_bavail * sfs.f_bsize;
- } else {
- ALOGE("Couldn't statfs %s: %s\n", android_data_dir.path, strerror(errno));
- return -1;
- }
-}
-
-cache_t* start_cache_collection()
-{
- cache_t* cache = (cache_t*)calloc(1, sizeof(cache_t));
- return cache;
-}
-
-#define CACHE_BLOCK_SIZE (512*1024)
-
-static void* _cache_malloc(cache_t* cache, size_t len)
-{
- len = (len+3)&~3;
- if (len > (CACHE_BLOCK_SIZE/2)) {
- // It doesn't make sense to try to put this allocation into one
- // of our blocks, because it is so big. Instead, make a new dedicated
- // block for it.
- int8_t* res = (int8_t*)malloc(len+sizeof(void*));
- if (res == NULL) {
- return NULL;
- }
- CACHE_NOISY(ALOGI("Allocated large cache mem block: %p size %d", res, len));
- // Link it into our list of blocks, not disrupting the current one.
- if (cache->memBlocks == NULL) {
- *(void**)res = NULL;
- cache->memBlocks = res;
- } else {
- *(void**)res = *(void**)cache->memBlocks;
- *(void**)cache->memBlocks = res;
- }
- return res + sizeof(void*);
- }
- int8_t* res = cache->curMemBlockAvail;
- int8_t* nextPos = res + len;
- if (cache->memBlocks == NULL || nextPos > cache->curMemBlockEnd) {
- int8_t* newBlock = malloc(CACHE_BLOCK_SIZE);
- if (newBlock == NULL) {
- return NULL;
- }
- CACHE_NOISY(ALOGI("Allocated new cache mem block: %p", newBlock));
- *(void**)newBlock = cache->memBlocks;
- cache->memBlocks = newBlock;
- res = cache->curMemBlockAvail = newBlock + sizeof(void*);
- cache->curMemBlockEnd = newBlock + CACHE_BLOCK_SIZE;
- nextPos = res + len;
- }
- CACHE_NOISY(ALOGI("cache_malloc: ret %p size %d, block=%p, nextPos=%p",
- res, len, cache->memBlocks, nextPos));
- cache->curMemBlockAvail = nextPos;
- return res;
-}
-
-static void* _cache_realloc(cache_t* cache, void* cur, size_t origLen, size_t len)
-{
- // This isn't really a realloc, but it is good enough for our purposes here.
- void* alloc = _cache_malloc(cache, len);
- if (alloc != NULL && cur != NULL) {
- memcpy(alloc, cur, origLen < len ? origLen : len);
- }
- return alloc;
-}
-
-static void _inc_num_cache_collected(cache_t* cache)
-{
- cache->numCollected++;
- if ((cache->numCollected%20000) == 0) {
- ALOGI("Collected cache so far: %d directories, %d files",
- cache->numDirs, cache->numFiles);
- }
-}
-
-static cache_dir_t* _add_cache_dir_t(cache_t* cache, cache_dir_t* parent, const char *name)
-{
- size_t nameLen = strlen(name);
- cache_dir_t* dir = (cache_dir_t*)_cache_malloc(cache, sizeof(cache_dir_t)+nameLen+1);
- if (dir != NULL) {
- dir->parent = parent;
- dir->childCount = 0;
- dir->hiddenCount = 0;
- dir->deleted = 0;
- strcpy(dir->name, name);
- if (cache->numDirs >= cache->availDirs) {
- size_t newAvail = cache->availDirs < 1000 ? 1000 : cache->availDirs*2;
- cache_dir_t** newDirs = (cache_dir_t**)_cache_realloc(cache, cache->dirs,
- cache->availDirs*sizeof(cache_dir_t*), newAvail*sizeof(cache_dir_t*));
- if (newDirs == NULL) {
- ALOGE("Failure growing cache dirs array for %s\n", name);
- return NULL;
- }
- cache->availDirs = newAvail;
- cache->dirs = newDirs;
- }
- cache->dirs[cache->numDirs] = dir;
- cache->numDirs++;
- if (parent != NULL) {
- parent->childCount++;
- }
- _inc_num_cache_collected(cache);
- } else {
- ALOGE("Failure allocating cache_dir_t for %s\n", name);
- }
- return dir;
-}
-
-static cache_file_t* _add_cache_file_t(cache_t* cache, cache_dir_t* dir, time_t modTime,
- const char *name)
-{
- size_t nameLen = strlen(name);
- cache_file_t* file = (cache_file_t*)_cache_malloc(cache, sizeof(cache_file_t)+nameLen+1);
- if (file != NULL) {
- file->dir = dir;
- file->modTime = modTime;
- strcpy(file->name, name);
- if (cache->numFiles >= cache->availFiles) {
- size_t newAvail = cache->availFiles < 1000 ? 1000 : cache->availFiles*2;
- cache_file_t** newFiles = (cache_file_t**)_cache_realloc(cache, cache->files,
- cache->availFiles*sizeof(cache_file_t*), newAvail*sizeof(cache_file_t*));
- if (newFiles == NULL) {
- ALOGE("Failure growing cache file array for %s\n", name);
- return NULL;
- }
- cache->availFiles = newAvail;
- cache->files = newFiles;
- }
- 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: %d directories, %d 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)
-{
- 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);
-}
-
-/**
- * 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)) {
- if (path[dir_len] == '.' || strchr(path + dir_len, '/') != NULL) {
- ALOGE("invalid system apk path '%s' (trickery)\n", path);
- return -1;
- }
- return 0;
- }
- }
-
- 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. An ASEC
- * directory is allowed to have one level of subdirectory names. Returns -1
- * when an invalid path is encountered and 0 when a valid path is encountered.
- */
-int validate_apk_path(const char *path)
-{
- int allowsubdir = 0;
- char *subdir = NULL;
- size_t dir_len;
- size_t path_len;
-
- if (!strncmp(path, android_app_dir.path, android_app_dir.len)) {
- dir_len = android_app_dir.len;
- } else if (!strncmp(path, android_app_private_dir.path, android_app_private_dir.len)) {
- dir_len = android_app_private_dir.len;
- } else if (!strncmp(path, android_asec_dir.path, android_asec_dir.len)) {
- dir_len = android_asec_dir.len;
- allowsubdir = 1;
- } else {
- ALOGE("invalid apk path '%s' (bad prefix)\n", path);
- return -1;
- }
-
- path_len = strlen(path);
-
- /*
- * Only allow the path to have a subdirectory if it's been marked as being allowed.
- */
- if ((subdir = strchr(path + dir_len, '/')) != NULL) {
- ++subdir;
- if (!allowsubdir
- || (path_len > (size_t) (subdir - path) && (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 == '.') || (strchr(subdir, '/') != NULL)))) {
- ALOGE("invalid apk path '%s' (trickery)\n", path);
- return -1;
- }
-
- return 0;
-}
-
-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];
- char path[PATH_MAX];
-
- // Ensure /data/media/<userid> exists
- create_persona_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;
-}
generated by cgit v1.1 at 2024-09-21 20:45:37 +0000