Always clone attribute from existing files to module files
This makes sure no weird permission/SELinux issues shall happen
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topjohnwu
parent
c9fa8118d1
commit
0c227f2917
@ -48,7 +48,7 @@ extern void auto_start_magiskhide();
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// Precedence: MODULE > SKEL > INTER > DUMMY
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#define IS_DUMMY 0x01 /* mount from mirror */
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#define IS_INTER 0x02 /* intermediate node */
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#define IS_SKEL 0x04 /* mount from skeleton */
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#define IS_SKEL 0x04 /* replace with tmpfs */
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#define IS_MODULE 0x08 /* mount from module */
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#define IS_DIR(n) ((n)->type == DT_DIR)
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@ -57,7 +57,8 @@ extern void auto_start_magiskhide();
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class node_entry {
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public:
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explicit node_entry(const char *, uint8_t status = 0, uint8_t type = 0);
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explicit node_entry(const char *name, uint8_t status = 0, uint8_t type = 0)
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: name(name), type(type), status(status), parent(nullptr) {}
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~node_entry();
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void create_module_tree(const char *module);
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void magic_mount();
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@ -71,29 +72,25 @@ private:
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node_entry *parent;
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vector<node_entry *> children;
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node_entry(const char *, const char *, uint8_t type);
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bool is_root();
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node_entry(node_entry *parent, const char *module, const char *name, uint8_t type)
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: node_entry(name, 0, type) {
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this->parent = parent;
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this->module = module;
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}
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bool is_vendor();
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string get_path();
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node_entry *insert(node_entry *);
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void insert(node_entry *&);
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void clone_skeleton();
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int get_path(char *path);
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};
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node_entry::node_entry(const char *name, uint8_t status, uint8_t type)
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: name(name), type(type), status(status), parent(nullptr) {}
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node_entry::node_entry(const char *module, const char *name, uint8_t type)
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: node_entry(name, (uint8_t) 0, type) {
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this->module = module;
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}
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node_entry::~node_entry() {
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for (auto &node : children)
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delete node;
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}
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bool node_entry::is_root() {
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return parent == nullptr;
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bool node_entry::is_vendor() {
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return parent ? (parent->parent ? false : name == "vendor") : false;
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}
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string node_entry::get_path() {
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@ -109,7 +106,7 @@ int node_entry::get_path(char *path) {
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return len;
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}
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node_entry *node_entry::insert(node_entry *node) {
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void node_entry::insert(node_entry *&node) {
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node->parent = this;
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for (auto &child : children) {
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if (child->name == node->name) {
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@ -117,15 +114,14 @@ node_entry *node_entry::insert(node_entry *node) {
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// The new node has higher precedence
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delete child;
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child = node;
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return node;
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} else {
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delete node;
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return child;
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node = child;
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}
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return;
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}
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}
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children.push_back(node);
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return node;
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}
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void node_entry::create_module_tree(const char *module) {
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@ -134,7 +130,6 @@ void node_entry::create_module_tree(const char *module) {
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auto full_path = get_path();
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snprintf(buf, PATH_MAX, "%s/%s%s", MODULEROOT, module, full_path.c_str());
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if (!(dir = xopendir(buf)))
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return;
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@ -142,8 +137,12 @@ void node_entry::create_module_tree(const char *module) {
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if (strcmp(entry->d_name, ".") == 0 || strcmp(entry->d_name, "..") == 0)
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continue;
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// Create new node
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auto node = new node_entry(module, entry->d_name, entry->d_type);
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auto node = new node_entry(this, module, entry->d_name, entry->d_type);
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// buf = real path, buf2 = module path
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snprintf(buf, PATH_MAX, "%s/%s", full_path.c_str(), entry->d_name);
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int eo2 = snprintf(buf2, PATH_MAX, MODULEROOT "/%s%s/%s",
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module, full_path.c_str(), entry->d_name);
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/*
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* Clone the parent in the following condition:
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@ -154,7 +153,7 @@ void node_entry::create_module_tree(const char *module) {
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bool clone = false;
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if (IS_LNK(node) || access(buf, F_OK) == -1) {
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clone = true;
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} else if (!is_root() || node->name != "vendor") {
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} else if (!node->is_vendor()) {
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struct stat s;
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xstat(buf, &s);
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if (S_ISLNK(s.st_mode))
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@ -165,23 +164,27 @@ void node_entry::create_module_tree(const char *module) {
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// Mark self as a skeleton
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status |= IS_SKEL; /* This will not overwrite if parent is module */
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node->status = IS_MODULE;
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} else if (IS_DIR(node)) {
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// Check if marked as replace
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snprintf(buf2, PATH_MAX, "%s/%s%s/.replace", MODULEROOT, module, buf);
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if (access(buf2, F_OK) == 0) {
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// Replace everything, mark as leaf
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} else {
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// Clone attributes from real path
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clone_attr(buf, buf2);
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if (IS_DIR(node)) {
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// Check if marked as replace
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strcpy(buf2 + eo2, "/.replace");
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if (access(buf2, F_OK) == 0) {
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// Replace everything, mark as leaf
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node->status = IS_MODULE;
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} else {
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// This will be an intermediate node
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node->status = IS_INTER;
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}
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} else if (IS_REG(node)) {
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// This is a file, mark as leaf
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node->status = IS_MODULE;
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} else {
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// This will be an intermediate node
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node->status = IS_INTER;
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}
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} else if (IS_REG(node)) {
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// This is a file, mark as leaf
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node->status = IS_MODULE;
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}
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node = insert(node);
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if (node->status & (IS_SKEL | IS_INTER)) {
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// Intermediate folder, travel deeper
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insert(node);
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if (IS_DIR(node)) {
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// Recursive traverse through everything
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node->create_module_tree(module);
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}
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}
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@ -225,7 +228,7 @@ void node_entry::clone_skeleton() {
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close(creat(buf, 0644));
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// Links will be handled later
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if (is_root() && child->name == "vendor") {
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if (child->is_vendor()) {
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if (seperate_vendor) {
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cp_afc(MIRRDIR "/system/vendor", "/system/vendor");
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VLOGI("copy_link ", "/system/vendor", MIRRDIR "/system/vendor");
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@ -270,13 +273,13 @@ void node_entry::magic_mount() {
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for (auto &child : children)
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child->magic_mount();
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}
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// The only thing goes here should be vendor placeholder
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// The only thing goes here should be placeholder nodes
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// There should be no dummies, so don't need to handle it here
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}
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node_entry *node_entry::extract(const char *name) {
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node_entry *node = nullptr;
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// Extract the vendor node out of system tree and swap with placeholder
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// Extract the node out and swap with placeholder
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for (auto &child : children) {
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if (child->name == name) {
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node = child;
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