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Support /system/product wihtout /product

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Fix #1676
This commit is contained in:
topjohnwu 2019-08-29 22:56:34 +08:00
parent c859ddfb8f
commit e89c50d934
1 changed files with 32 additions and 29 deletions
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61
native/jni/core/bootstages.cpp
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@ -55,15 +55,18 @@ extern void auto_start_magiskhide();
class node_entry {
public:
explicit node_entry(const char *name, uint8_t status = 0, uint8_t type = 0)
: name(name), type(type), status(status), parent(nullptr) {}
explicit node_entry(const char *name, uint8_t type = DT_DIR, uint8_t status = IS_INTER)
: module(nullptr), name(name), type(type), status(status), parent(nullptr) {}
~node_entry();
void create_module_tree(const char *module);
void magic_mount();
node_entry *extract(const char *name);
static bool vendor_root;
static bool product_root;
private:
const char *module; /* Only used when status & IS_MODULE */
const char *module; /* Only used when IS_MODULE */
const string name;
uint8_t type;
uint8_t status;
@ -71,10 +74,7 @@ private:
vector<node_entry *> children;
node_entry(node_entry *parent, const char *module, const char *name, uint8_t type)
: node_entry(name, 0, type) {
this->parent = parent;
this->module = module;
}
: module(module), name(name), type(type), status(0), parent(parent) {}
bool is_special();
bool is_root();
string get_path();
@ -83,12 +83,16 @@ private:
int get_path(char *path);
};
bool node_entry::vendor_root = false;
bool node_entry::product_root = false;
node_entry::~node_entry() {
for (auto &node : children)
delete node;
}
#define SPECIAL_NODE (parent->parent ? false : (name == "vendor" || name == "product"))
#define SPECIAL_NODE (parent->parent ? false : \
((vendor_root && name == "vendor") || (product_root && name == "product")))
bool node_entry::is_special() {
return parent ? SPECIAL_NODE : false;
@ -139,7 +143,7 @@ void node_entry::create_module_tree(const char *module) {
return;
while ((entry = xreaddir(dir))) {
if (strcmp(entry->d_name, ".") == 0 || strcmp(entry->d_name, "..") == 0)
if (entry->d_name == "."sv || entry->d_name == ".."sv)
continue;
// Create new node
auto node = new node_entry(this, module, entry->d_name, entry->d_type);
@ -150,11 +154,10 @@ void node_entry::create_module_tree(const char *module) {
module, full_path.c_str(), entry->d_name);
/*
* Clone current node directory in the following condition:
* 1. We are not a root node
* 2. Target does not exist or
* 3. Module file is a symlink or
* 4. Target file is a symlink (exclude special nodes)
* Clone current directory in one of the following conditions:
* - Target does not exist
* - Module file is a symlink
* - Target file is a symlink (exclude special nodes)
*/
bool clone = false;
if (IS_LNK(node) || access(buf, F_OK) == -1) {
@ -209,7 +212,6 @@ void node_entry::create_module_tree(const char *module) {
void node_entry::clone_skeleton() {
DIR *dir;
struct dirent *entry;
node_entry *dummy;
// Clone the structure
auto full_path = get_path();
@ -217,10 +219,10 @@ void node_entry::clone_skeleton() {
if (!(dir = xopendir(buf)))
return;
while ((entry = xreaddir(dir))) {
if (strcmp(entry->d_name, ".") == 0 || strcmp(entry->d_name, "..") == 0)
if (entry->d_name == "."sv || entry->d_name == ".."sv)
continue;
// Create dummy node
dummy = new node_entry(entry->d_name, IS_DUMMY, entry->d_type);
auto dummy = new node_entry(entry->d_name, entry->d_type, IS_DUMMY);
insert(dummy);
}
closedir(dir);
@ -422,7 +424,7 @@ static void prepare_modules() {
if ((dir = opendir(MODULEUPGRADE))) {
while ((entry = xreaddir(dir))) {
if (entry->d_type == DT_DIR) {
if (strcmp(entry->d_name, ".") == 0 || strcmp(entry->d_name, "..") == 0)
if (entry->d_name == "."sv || entry->d_name == ".."sv)
continue;
// Cleanup old module if exists
snprintf(buf, sizeof(buf), "%s/%s", MODULEROOT, entry->d_name);
@ -441,6 +443,9 @@ static void prepare_modules() {
xmkdir(LEGACYCORE, 0755);
symlink(SECURE_DIR "/post-fs-data.d", LEGACYCORE "/post-fs-data.d");
symlink(SECURE_DIR "/service.d", LEGACYCORE "/service.d");
restorecon();
chmod(SECURE_DIR, 0700);
}
static void collect_modules() {
@ -450,9 +455,7 @@ static void collect_modules() {
struct dirent *entry;
while ((entry = xreaddir(dir))) {
if (entry->d_type == DT_DIR) {
if (strcmp(entry->d_name, ".") == 0 ||
strcmp(entry->d_name, "..") == 0 ||
strcmp(entry->d_name, ".core") == 0)
if (entry->d_name == "."sv || entry->d_name == ".."sv || entry->d_name == ".core"sv)
continue;
chdir(entry->d_name);
if (access("remove", F_OK) == 0) {
@ -615,9 +618,6 @@ void post_fs_data(int client) {
prepare_modules();
restorecon();
chmod(SECURE_DIR, 0700);
// Core only mode
if (access(DISABLEFILE, F_OK) == 0)
core_only();
@ -632,8 +632,11 @@ void post_fs_data(int client) {
module_list.clear();
collect_modules();
node_entry::vendor_root = access("/vendor", F_OK) == 0;
node_entry::product_root = access("/product", F_OK) == 0;
// Create the system root entry
auto sys_root = new node_entry("system", IS_INTER);
auto sys_root = new node_entry("system");
bool has_modules = false;
@ -660,14 +663,14 @@ void post_fs_data(int client) {
LOGI("%s: constructing magic mount structure\n", module);
// If /system/vendor exists in module, create a link outside
snprintf(buf, PATH_MAX, "%s/%s/system/vendor", MODULEROOT, module);
if (access(buf, F_OK) == 0) {
if (node_entry::vendor_root && access(buf, F_OK) == 0) {
snprintf(buf2, PATH_MAX, "%s/%s/vendor", MODULEROOT, module);
unlink(buf2);
xsymlink("./system/vendor", buf2);
}
// If /system/product exists in module, create a link outside
snprintf(buf, PATH_MAX, "%s/%s/system/product", MODULEROOT, module);
if (access(buf, F_OK) == 0) {
if (node_entry::product_root && access(buf, F_OK) == 0) {
snprintf(buf2, PATH_MAX, "%s/%s/product", MODULEROOT, module);
unlink(buf2);
xsymlink("./system/product", buf2);
@ -678,11 +681,11 @@ void post_fs_data(int client) {
if (has_modules) {
// Pull out special nodes if exist
node_entry *special;
if ((special = sys_root->extract("vendor"))) {
if (node_entry::vendor_root && (special = sys_root->extract("vendor"))) {
special->magic_mount();
delete special;
}
if ((special = sys_root->extract("product"))) {
if (node_entry::product_root && (special = sys_root->extract("product"))) {
special->magic_mount();
delete special;
}