mirror of
https://github.com/topjohnwu/Magisk.git
synced 2024-12-27 04:37:39 +00:00
799 lines
26 KiB
C++
799 lines
26 KiB
C++
#include <sys/mount.h>
|
|
#include <map>
|
|
#include <utility>
|
|
|
|
#include <base.hpp>
|
|
#include <magisk.hpp>
|
|
#include <daemon.hpp>
|
|
#include <selinux.hpp>
|
|
#include <resetprop.hpp>
|
|
|
|
#include "core.hpp"
|
|
|
|
using namespace std;
|
|
|
|
#define VLOGD(tag, from, to) LOGD("%-8s: %s <- %s\n", tag, to, from)
|
|
|
|
#define TYPE_MIRROR (1 << 0) /* mount from mirror */
|
|
#define TYPE_INTER (1 << 1) /* intermediate node */
|
|
#define TYPE_TMPFS (1 << 2) /* replace with tmpfs */
|
|
#define TYPE_MODULE (1 << 3) /* mount from module */
|
|
#define TYPE_ROOT (1 << 4) /* partition root */
|
|
#define TYPE_CUSTOM (1 << 5) /* custom node type overrides all */
|
|
#define TYPE_DIR (TYPE_INTER|TYPE_TMPFS|TYPE_ROOT)
|
|
|
|
class node_entry;
|
|
class dir_node;
|
|
class inter_node;
|
|
class mirror_node;
|
|
class tmpfs_node;
|
|
class module_node;
|
|
class root_node;
|
|
|
|
template<class T> static bool isa(node_entry *node);
|
|
static int bind_mount(const char *from, const char *to) {
|
|
int ret = xmount(from, to, nullptr, MS_BIND, nullptr);
|
|
if (ret == 0)
|
|
VLOGD("bind_mnt", from, to);
|
|
return ret;
|
|
}
|
|
|
|
template<class T> uint8_t type_id() { return TYPE_CUSTOM; }
|
|
template<> uint8_t type_id<dir_node>() { return TYPE_DIR; }
|
|
template<> uint8_t type_id<inter_node>() { return TYPE_INTER; }
|
|
template<> uint8_t type_id<mirror_node>() { return TYPE_MIRROR; }
|
|
template<> uint8_t type_id<tmpfs_node>() { return TYPE_TMPFS; }
|
|
template<> uint8_t type_id<module_node>() { return TYPE_MODULE; }
|
|
template<> uint8_t type_id<root_node>() { return TYPE_ROOT; }
|
|
|
|
class node_entry {
|
|
public:
|
|
virtual ~node_entry() = default;
|
|
|
|
// Node info
|
|
bool is_dir() { return file_type() == DT_DIR; }
|
|
bool is_lnk() { return file_type() == DT_LNK; }
|
|
bool is_reg() { return file_type() == DT_REG; }
|
|
uint8_t type() { return node_type; }
|
|
const string &name() { return _name; }
|
|
|
|
// Don't call the following two functions before prepare
|
|
const string &node_path();
|
|
string mirror_path() { return mirror_dir + node_path(); }
|
|
|
|
// Tree methods
|
|
dir_node *parent() { return _parent; }
|
|
void merge(node_entry *other);
|
|
|
|
virtual void mount() = 0;
|
|
|
|
static string module_mnt;
|
|
static string mirror_dir;
|
|
|
|
protected:
|
|
template<class T>
|
|
node_entry(const char *name, uint8_t file_type, T*)
|
|
: _name(name), _file_type(file_type), node_type(type_id<T>()) {}
|
|
|
|
template<class T>
|
|
explicit node_entry(T*) : _file_type(0), node_type(type_id<T>()) {}
|
|
|
|
void create_and_mount(const string &src);
|
|
|
|
// Use top bit of _file_type for node exist status
|
|
bool exist() { return static_cast<bool>(_file_type & (1 << 7)); }
|
|
void set_exist(bool b) { if (b) _file_type |= (1 << 7); else _file_type &= ~(1 << 7); }
|
|
uint8_t file_type() { return static_cast<uint8_t>(_file_type & ~(1 << 7)); }
|
|
|
|
private:
|
|
friend class dir_node;
|
|
|
|
static bool should_be_tmpfs(node_entry *child);
|
|
|
|
// Node properties
|
|
string _name;
|
|
uint8_t _file_type;
|
|
uint8_t node_type;
|
|
|
|
dir_node *_parent = nullptr;
|
|
|
|
// Cache, it should only be used within prepare
|
|
string _node_path;
|
|
};
|
|
|
|
class dir_node : public node_entry {
|
|
public:
|
|
friend void node_entry::merge(node_entry *other);
|
|
|
|
using map_type = map<string_view, node_entry *>;
|
|
using iterator = map_type::iterator;
|
|
|
|
~dir_node() override {
|
|
for (auto &it : children)
|
|
delete it.second;
|
|
children.clear();
|
|
}
|
|
|
|
// Return false to indicate need to upgrade to module
|
|
bool collect_files(const char *module, int dfd);
|
|
|
|
// Return false to indicate need to upgrade to skeleton
|
|
bool prepare();
|
|
|
|
// Default directory mount logic
|
|
void mount() override {
|
|
for (auto &pair : children)
|
|
pair.second->mount();
|
|
}
|
|
|
|
/***************
|
|
* Tree Methods
|
|
***************/
|
|
|
|
bool is_empty() { return children.empty(); }
|
|
|
|
template<class T>
|
|
T *child(string_view name) { return iterator_to_node<T>(children.find(name)); }
|
|
|
|
// Lazy val
|
|
root_node *root() {
|
|
if (!_root)
|
|
_root = _parent->root();
|
|
return _root;
|
|
}
|
|
|
|
// Return child with name or nullptr
|
|
node_entry *extract(string_view name);
|
|
|
|
// Return false if rejected
|
|
bool insert(node_entry *node) {
|
|
auto fn = [=](auto) { return node; };
|
|
return node && iterator_to_node(insert(node->_name, node->node_type, fn));
|
|
}
|
|
|
|
// Return inserted node or null if rejected
|
|
template<class T, class ...Args>
|
|
T *emplace(string_view name, Args &&...args) {
|
|
auto fn = [&](auto) { return new T(std::forward<Args>(args)...); };
|
|
return iterator_to_node<T>(insert(name, type_id<T>(), fn));
|
|
}
|
|
|
|
// Return inserted node, existing node with same rank, or null if rejected
|
|
template<class T, class ...Args>
|
|
T *emplace_or_get(string_view name, Args &&...args) {
|
|
auto fn = [&](auto) { return new T(std::forward<Args>(args)...); };
|
|
return iterator_to_node<T>(insert(name, type_id<T>(), fn, true));
|
|
}
|
|
|
|
// Return upgraded node or null if rejected
|
|
template<class T, class ...Args>
|
|
T *upgrade(string_view name, Args &...args) {
|
|
return iterator_to_node<T>(upgrade<T>(children.find(name), args...));
|
|
}
|
|
|
|
protected:
|
|
template<class T>
|
|
dir_node(const char *name, uint8_t file_type, T *self) : node_entry(name, file_type, self) {
|
|
if constexpr (std::is_same_v<T, root_node>)
|
|
_root = self;
|
|
}
|
|
|
|
template<class T>
|
|
dir_node(node_entry *node, T *self) : node_entry(self) {
|
|
merge(node);
|
|
if constexpr (std::is_same_v<T, root_node>)
|
|
_root = self;
|
|
}
|
|
|
|
template<class T>
|
|
dir_node(const char *name, T *self) : dir_node(name, DT_DIR, self) {}
|
|
|
|
template<class T = node_entry>
|
|
T *iterator_to_node(iterator it) {
|
|
return static_cast<T*>(it == children.end() ? nullptr : it->second);
|
|
}
|
|
|
|
// Emplace insert a new node, or upgrade if the requested type has a higher rank.
|
|
// Return iterator to new node or end() if insertion is rejected.
|
|
// If get_same is true and a node with the same rank exists, it will return that node instead.
|
|
// fn is the node construction callback. Signature: (node_ent *&) -> node_ent *
|
|
// fn gets a reference to the existing node pointer and returns a new node object.
|
|
// Input is null when there is no existing node. If returns null, the insertion is rejected.
|
|
// If fn consumes the input, it should set the reference to null.
|
|
template<typename Func>
|
|
iterator insert(iterator it, uint8_t type, const Func &fn, bool get_same);
|
|
|
|
template<typename Func>
|
|
iterator insert(string_view name, uint8_t type, const Func &fn, bool get_same = false) {
|
|
return insert(children.find(name), type, fn, get_same);
|
|
}
|
|
|
|
template<class To, class From = node_entry, class ...Args>
|
|
iterator upgrade(iterator it, Args &&...args);
|
|
|
|
// dir nodes host children
|
|
map_type children;
|
|
|
|
// Root node lookup cache
|
|
root_node *_root = nullptr;
|
|
};
|
|
|
|
class root_node : public dir_node {
|
|
public:
|
|
explicit root_node(const char *name) : dir_node(name, this), prefix("") {}
|
|
explicit root_node(node_entry *node) : dir_node(node, this), prefix("/system") {}
|
|
const char * const prefix;
|
|
};
|
|
|
|
class inter_node : public dir_node {
|
|
public:
|
|
inter_node(const char *name, const char *module) : dir_node(name, this), module(module) {}
|
|
private:
|
|
const char *module;
|
|
friend class module_node;
|
|
};
|
|
|
|
class module_node : public node_entry {
|
|
public:
|
|
module_node(const char *module, dirent *entry)
|
|
: node_entry(entry->d_name, entry->d_type, this), module(module) {}
|
|
|
|
module_node(node_entry *node, const char *module) : node_entry(this), module(module) {
|
|
merge(node);
|
|
}
|
|
|
|
explicit module_node(inter_node *node) : module_node(node, node->module) {}
|
|
|
|
void mount() override;
|
|
private:
|
|
const char *module;
|
|
};
|
|
|
|
// Don't create the following two nodes before prepare
|
|
class mirror_node : public node_entry {
|
|
public:
|
|
explicit mirror_node(dirent *entry) : node_entry(entry->d_name, entry->d_type, this) {}
|
|
void mount() override {
|
|
create_and_mount(mirror_path());
|
|
}
|
|
};
|
|
|
|
class tmpfs_node : public dir_node {
|
|
public:
|
|
explicit tmpfs_node(node_entry *node);
|
|
void mount() override;
|
|
};
|
|
|
|
// Poor man's dynamic cast without RTTI
|
|
template<class T>
|
|
static bool isa(node_entry *node) {
|
|
return node && (node->type() & type_id<T>());
|
|
}
|
|
template<class T>
|
|
static T *dyn_cast(node_entry *node) {
|
|
return isa<T>(node) ? static_cast<T*>(node) : nullptr;
|
|
}
|
|
|
|
string node_entry::module_mnt;
|
|
string node_entry::mirror_dir;
|
|
|
|
// other will be deleted
|
|
void node_entry::merge(node_entry *other) {
|
|
_name.swap(other->_name);
|
|
_file_type = other->_file_type;
|
|
_parent = other->_parent;
|
|
|
|
// Merge children if both is dir
|
|
if (auto a = dyn_cast<dir_node>(this)) {
|
|
if (auto b = dyn_cast<dir_node>(other)) {
|
|
a->children.merge(b->children);
|
|
for (auto &pair : a->children)
|
|
pair.second->_parent = a;
|
|
}
|
|
}
|
|
delete other;
|
|
}
|
|
|
|
const string &node_entry::node_path() {
|
|
if (_parent && _node_path.empty())
|
|
_node_path = _parent->node_path() + '/' + _name;
|
|
return _node_path;
|
|
}
|
|
|
|
/*************************
|
|
* Node Tree Construction
|
|
*************************/
|
|
|
|
template<typename Func>
|
|
dir_node::iterator dir_node::insert(iterator it, uint8_t type, const Func &fn, bool get_same) {
|
|
node_entry *node = nullptr;
|
|
if (it != children.end()) {
|
|
// Upgrade existing node only if higher rank
|
|
if (it->second->node_type < type) {
|
|
node = fn(it->second);
|
|
if (!node)
|
|
return children.end();
|
|
if (it->second)
|
|
node->merge(it->second);
|
|
it = children.erase(it);
|
|
// Minor optimization to make insert O(1) by using hint
|
|
if (it == children.begin())
|
|
it = children.emplace(node->_name, node).first;
|
|
else
|
|
it = children.emplace_hint(--it, node->_name, node);
|
|
} else {
|
|
if (get_same && it->second->node_type != type)
|
|
return children.end();
|
|
return it;
|
|
}
|
|
} else {
|
|
node = fn(node);
|
|
if (!node)
|
|
return children.end();
|
|
node->_parent = this;
|
|
it = children.emplace(node->_name, node).first;
|
|
}
|
|
return it;
|
|
}
|
|
|
|
template<class To, class From, class... Args>
|
|
dir_node::iterator dir_node::upgrade(iterator it, Args &&... args) {
|
|
return insert(it, type_id<To>(), [&](node_entry *&ex) -> node_entry * {
|
|
if (!ex)
|
|
return nullptr;
|
|
if constexpr (!std::is_same_v<From, node_entry>) {
|
|
// Type check if type is specified
|
|
if (!isa<From>(ex))
|
|
return nullptr;
|
|
}
|
|
auto node = new To(static_cast<From *>(ex), std::forward<Args>(args)...);
|
|
ex = nullptr;
|
|
return node;
|
|
}, false);
|
|
}
|
|
|
|
node_entry* dir_node::extract(string_view name) {
|
|
auto it = children.find(name);
|
|
if (it != children.end()) {
|
|
auto ret = it->second;
|
|
children.erase(it);
|
|
return ret;
|
|
}
|
|
return nullptr;
|
|
}
|
|
|
|
tmpfs_node::tmpfs_node(node_entry *node) : dir_node(node, this) {
|
|
string mirror = mirror_path();
|
|
if (auto dir = open_dir(mirror.data())) {
|
|
set_exist(true);
|
|
for (dirent *entry; (entry = xreaddir(dir.get()));) {
|
|
// Insert mirror nodes
|
|
emplace<mirror_node>(entry->d_name, entry);
|
|
}
|
|
} else {
|
|
// It is actually possible that mirror does not exist (nested mount points)
|
|
// Set self to non exist so this node will be ignored at mount
|
|
// Keep it the same as `node`
|
|
return;
|
|
}
|
|
|
|
for (auto it = children.begin(); it != children.end(); ++it) {
|
|
// Need to upgrade all inter_node children to tmpfs_node
|
|
if (isa<inter_node>(it->second))
|
|
it = upgrade<tmpfs_node>(it);
|
|
}
|
|
}
|
|
|
|
// We need to upgrade to tmpfs node if any child:
|
|
// - Target does not exist
|
|
// - Source or target is a symlink
|
|
bool node_entry::should_be_tmpfs(node_entry *child) {
|
|
struct stat st;
|
|
if (lstat(child->node_path().data(), &st) != 0) {
|
|
return true;
|
|
} else {
|
|
child->set_exist(true);
|
|
if (child->is_lnk() || S_ISLNK(st.st_mode))
|
|
return true;
|
|
}
|
|
return false;
|
|
}
|
|
|
|
bool dir_node::prepare() {
|
|
bool to_tmpfs = false;
|
|
for (auto it = children.begin(); it != children.end();) {
|
|
if (should_be_tmpfs(it->second)) {
|
|
if (node_type > type_id<tmpfs_node>()) {
|
|
// Upgrade will fail, remove the unsupported child node
|
|
LOGW("Unable to add: %s, skipped\n", it->second->node_path().data());
|
|
delete it->second;
|
|
it = children.erase(it);
|
|
continue;
|
|
}
|
|
// Tell parent to upgrade self to tmpfs
|
|
to_tmpfs = true;
|
|
// If child is inter_node and it does not (need to) exist, upgrade to module
|
|
if (auto dn = dyn_cast<inter_node>(it->second); dn) {
|
|
if (!dn->exist()) {
|
|
if (auto nit = upgrade<module_node, inter_node>(it); nit != children.end()) {
|
|
it = nit;
|
|
goto next_node;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
if (auto dn = dyn_cast<dir_node>(it->second); dn && dn->is_dir() && !dn->prepare()) {
|
|
// Upgrade child to tmpfs
|
|
it = upgrade<tmpfs_node>(it);
|
|
}
|
|
next_node:
|
|
++it;
|
|
}
|
|
return !to_tmpfs;
|
|
}
|
|
|
|
bool dir_node::collect_files(const char *module, int dfd) {
|
|
auto dir = xopen_dir(xopenat(dfd, _name.data(), O_RDONLY | O_CLOEXEC));
|
|
if (!dir)
|
|
return true;
|
|
|
|
for (dirent *entry; (entry = xreaddir(dir.get()));) {
|
|
if (entry->d_name == ".replace"sv) {
|
|
// Stop traversing and tell parent to upgrade self to module
|
|
return false;
|
|
}
|
|
|
|
if (entry->d_type == DT_DIR) {
|
|
dir_node *dn;
|
|
if (auto it = children.find(entry->d_name); it == children.end()) {
|
|
dn = emplace<inter_node>(entry->d_name, entry->d_name, module);
|
|
} else {
|
|
dn = dyn_cast<inter_node>(it->second);
|
|
// it has been accessed by at least two modules, it must be guarantee to exist
|
|
// set it so that it won't be upgrade to module_node but tmpfs_node
|
|
if (dn) dn->set_exist(true);
|
|
}
|
|
if (dn && !dn->collect_files(module, dirfd(dir.get()))) {
|
|
upgrade<module_node>(dn->name(), module);
|
|
}
|
|
} else {
|
|
emplace<module_node>(entry->d_name, module, entry);
|
|
}
|
|
}
|
|
return true;
|
|
}
|
|
|
|
/************************
|
|
* Mount Implementations
|
|
************************/
|
|
|
|
void node_entry::create_and_mount(const string &src) {
|
|
const string &dest = node_path();
|
|
if (is_lnk()) {
|
|
VLOGD("cp_link", src.data(), dest.data());
|
|
cp_afc(src.data(), dest.data());
|
|
} else {
|
|
if (is_dir())
|
|
xmkdir(dest.data(), 0);
|
|
else if (is_reg())
|
|
close(xopen(dest.data(), O_RDONLY | O_CREAT | O_CLOEXEC, 0));
|
|
else
|
|
return;
|
|
bind_mount(src.data(), dest.data());
|
|
}
|
|
}
|
|
|
|
void module_node::mount() {
|
|
string src = module_mnt + module + parent()->root()->prefix + node_path();
|
|
if (exist())
|
|
clone_attr(mirror_path().data(), src.data());
|
|
if (isa<tmpfs_node>(parent()))
|
|
create_and_mount(src);
|
|
else if (is_dir() || is_reg())
|
|
bind_mount(src.data(), node_path().data());
|
|
}
|
|
|
|
void tmpfs_node::mount() {
|
|
if (!exist())
|
|
return;
|
|
string src = mirror_path();
|
|
const string &dest = node_path();
|
|
file_attr a{};
|
|
if (access(src.data(), F_OK) == 0)
|
|
getattr(src.data(), &a);
|
|
else
|
|
getattr(parent()->node_path().data(), &a);
|
|
mkdir(dest.data(), 0);
|
|
if (!isa<tmpfs_node>(parent())) {
|
|
// We don't need another layer of tmpfs if parent is skel
|
|
xmount("tmpfs", dest.data(), "tmpfs", 0, nullptr);
|
|
VLOGD("mnt_tmp", "tmpfs", dest.data());
|
|
}
|
|
setattr(dest.data(), &a);
|
|
dir_node::mount();
|
|
}
|
|
|
|
/****************
|
|
* Magisk Stuffs
|
|
****************/
|
|
|
|
class magisk_node : public node_entry {
|
|
public:
|
|
explicit magisk_node(const char *name) : node_entry(name, DT_REG, this) {}
|
|
|
|
void mount() override {
|
|
const string &dir_name = parent()->node_path();
|
|
if (name() == "magisk") {
|
|
for (int i = 0; applet_names[i]; ++i) {
|
|
string dest = dir_name + "/" + applet_names[i];
|
|
VLOGD("create", "./magisk", dest.data());
|
|
xsymlink("./magisk", dest.data());
|
|
}
|
|
} else {
|
|
string dest = dir_name + "/supolicy";
|
|
VLOGD("create", "./magiskpolicy", dest.data());
|
|
xsymlink("./magiskpolicy", dest.data());
|
|
}
|
|
create_and_mount(MAGISKTMP + "/" + name());
|
|
}
|
|
};
|
|
|
|
static void inject_magisk_bins(root_node *system) {
|
|
auto bin = system->child<inter_node>("bin");
|
|
if (!bin) {
|
|
bin = new inter_node("bin", "");
|
|
system->insert(bin);
|
|
}
|
|
|
|
// Insert binaries
|
|
bin->insert(new magisk_node("magisk"));
|
|
bin->insert(new magisk_node("magiskpolicy"));
|
|
|
|
// Also delete all applets to make sure no modules can override it
|
|
for (int i = 0; applet_names[i]; ++i)
|
|
delete bin->extract(applet_names[i]);
|
|
delete bin->extract("supolicy");
|
|
}
|
|
|
|
vector<module_info> *module_list;
|
|
int app_process_32 = -1;
|
|
int app_process_64 = -1;
|
|
|
|
#define mount_zygisk(bit) \
|
|
if (access("/system/bin/app_process" #bit, F_OK) == 0) { \
|
|
app_process_##bit = xopen("/system/bin/app_process" #bit, O_RDONLY | O_CLOEXEC); \
|
|
string zbin = zygisk_bin + "/app_process" #bit; \
|
|
string mbin = MAGISKTMP + "/magisk" #bit; \
|
|
int src = xopen(mbin.data(), O_RDONLY | O_CLOEXEC); \
|
|
int out = xopen(zbin.data(), O_CREAT | O_WRONLY | O_CLOEXEC, 0); \
|
|
xsendfile(out, src, nullptr, INT_MAX); \
|
|
close(src); \
|
|
close(out); \
|
|
clone_attr("/system/bin/app_process" #bit, zbin.data()); \
|
|
bind_mount(zbin.data(), "/system/bin/app_process" #bit); \
|
|
}
|
|
|
|
void magic_mount() {
|
|
node_entry::mirror_dir = MAGISKTMP + "/" MIRRDIR;
|
|
node_entry::module_mnt = MAGISKTMP + "/" MODULEMNT "/";
|
|
|
|
auto root = make_unique<root_node>("");
|
|
auto system = new root_node("system");
|
|
root->insert(system);
|
|
|
|
char buf[4096];
|
|
LOGI("* Loading modules\n");
|
|
for (const auto &m : *module_list) {
|
|
const char *module = m.name.data();
|
|
char *b = buf + sprintf(buf, "%s/" MODULEMNT "/%s/", MAGISKTMP.data(), module);
|
|
|
|
// Read props
|
|
strcpy(b, "system.prop");
|
|
if (access(buf, F_OK) == 0) {
|
|
LOGI("%s: loading [system.prop]\n", module);
|
|
load_prop_file(buf, false);
|
|
}
|
|
|
|
// Check whether skip mounting
|
|
strcpy(b, "skip_mount");
|
|
if (access(buf, F_OK) == 0)
|
|
continue;
|
|
|
|
// Double check whether the system folder exists
|
|
strcpy(b, "system");
|
|
if (access(buf, F_OK) != 0)
|
|
continue;
|
|
|
|
LOGI("%s: loading mount files\n", module);
|
|
b[-1] = '\0';
|
|
int fd = xopen(buf, O_RDONLY | O_CLOEXEC);
|
|
system->collect_files(module, fd);
|
|
close(fd);
|
|
}
|
|
if (MAGISKTMP != "/sbin") {
|
|
// Need to inject our binaries into /system/bin
|
|
inject_magisk_bins(system);
|
|
}
|
|
|
|
if (!system->is_empty()) {
|
|
// Handle special read-only partitions
|
|
for (const char *part : { "/vendor", "/product", "/system_ext" }) {
|
|
struct stat st;
|
|
if (lstat(part, &st) == 0 && S_ISDIR(st.st_mode)) {
|
|
if (auto old = system->extract(part + 1)) {
|
|
auto new_node = new root_node(old);
|
|
root->insert(new_node);
|
|
}
|
|
}
|
|
}
|
|
root->prepare();
|
|
root->mount();
|
|
}
|
|
|
|
// Mount on top of modules to enable zygisk
|
|
if (zygisk_enabled) {
|
|
string zygisk_bin = MAGISKTMP + "/" ZYGISKBIN;
|
|
mkdir(zygisk_bin.data(), 0);
|
|
mount_zygisk(32)
|
|
mount_zygisk(64)
|
|
}
|
|
}
|
|
|
|
static void prepare_modules() {
|
|
// Upgrade modules
|
|
if (auto dir = open_dir(MODULEUPGRADE); dir) {
|
|
int ufd = dirfd(dir.get());
|
|
int mfd = xopen(MODULEROOT, O_RDONLY | O_CLOEXEC);
|
|
for (dirent *entry; (entry = xreaddir(dir.get()));) {
|
|
if (entry->d_type == DT_DIR) {
|
|
// Cleanup old module if exists
|
|
if (faccessat(mfd, entry->d_name, F_OK, 0) == 0) {
|
|
int modfd = xopenat(mfd, entry->d_name, O_RDONLY | O_CLOEXEC);
|
|
if (faccessat(modfd, "disable", F_OK, 0) == 0) {
|
|
auto disable = entry->d_name + "/disable"s;
|
|
close(xopenat(ufd, disable.data(), O_RDONLY | O_CREAT | O_CLOEXEC, 0));
|
|
}
|
|
frm_rf(modfd);
|
|
unlinkat(mfd, entry->d_name, AT_REMOVEDIR);
|
|
}
|
|
LOGI("Upgrade / New module: %s\n", entry->d_name);
|
|
renameat(ufd, entry->d_name, mfd, entry->d_name);
|
|
}
|
|
}
|
|
close(mfd);
|
|
rm_rf(MODULEUPGRADE);
|
|
}
|
|
|
|
// Setup module mount (workaround nosuid selabel issue)
|
|
auto src = MAGISKTMP + "/" MIRRDIR MODULEROOT;
|
|
auto dest = MAGISKTMP + "/" MODULEMNT;
|
|
xmkdir(dest.data(), 0755);
|
|
bind_mount(src.data(), dest.data());
|
|
|
|
restorecon();
|
|
chmod(SECURE_DIR, 0700);
|
|
}
|
|
|
|
template<typename Func>
|
|
static void foreach_module(Func fn) {
|
|
auto dir = open_dir(MODULEROOT);
|
|
if (!dir)
|
|
return;
|
|
|
|
int dfd = dirfd(dir.get());
|
|
for (dirent *entry; (entry = xreaddir(dir.get()));) {
|
|
if (entry->d_type == DT_DIR && entry->d_name != ".core"sv) {
|
|
int modfd = xopenat(dfd, entry->d_name, O_RDONLY | O_CLOEXEC);
|
|
fn(dfd, entry, modfd);
|
|
close(modfd);
|
|
}
|
|
}
|
|
}
|
|
|
|
static void collect_modules(bool open_zygisk) {
|
|
foreach_module([=](int dfd, dirent *entry, int modfd) {
|
|
if (faccessat(modfd, "remove", F_OK, 0) == 0) {
|
|
LOGI("%s: remove\n", entry->d_name);
|
|
auto uninstaller = MODULEROOT + "/"s + entry->d_name + "/uninstall.sh";
|
|
if (access(uninstaller.data(), F_OK) == 0)
|
|
exec_script(uninstaller.data());
|
|
frm_rf(xdup(modfd));
|
|
unlinkat(dfd, entry->d_name, AT_REMOVEDIR);
|
|
return;
|
|
}
|
|
unlinkat(modfd, "update", 0);
|
|
if (faccessat(modfd, "disable", F_OK, 0) == 0)
|
|
return;
|
|
|
|
module_info info;
|
|
if (zygisk_enabled) {
|
|
// Riru and its modules are not compatible with zygisk
|
|
if (entry->d_name == "riru-core"sv || faccessat(modfd, "riru", F_OK, 0) == 0) {
|
|
LOGI("%s: ignore\n", entry->d_name);
|
|
return;
|
|
}
|
|
if (open_zygisk) {
|
|
#if defined(__arm__)
|
|
info.z32 = openat(modfd, "zygisk/armeabi-v7a.so", O_RDONLY | O_CLOEXEC);
|
|
#elif defined(__aarch64__)
|
|
info.z32 = openat(modfd, "zygisk/armeabi-v7a.so", O_RDONLY | O_CLOEXEC);
|
|
info.z64 = openat(modfd, "zygisk/arm64-v8a.so", O_RDONLY | O_CLOEXEC);
|
|
#elif defined(__i386__)
|
|
info.z32 = openat(modfd, "zygisk/x86.so", O_RDONLY | O_CLOEXEC);
|
|
#elif defined(__x86_64__)
|
|
info.z32 = openat(modfd, "zygisk/x86.so", O_RDONLY | O_CLOEXEC);
|
|
info.z64 = openat(modfd, "zygisk/x86_64.so", O_RDONLY | O_CLOEXEC);
|
|
#else
|
|
#error Unsupported ABI
|
|
#endif
|
|
unlinkat(modfd, "zygisk/unloaded", 0);
|
|
}
|
|
} else {
|
|
// Ignore zygisk modules when zygisk is not enabled
|
|
if (faccessat(modfd, "zygisk", F_OK, 0) == 0) {
|
|
LOGI("%s: ignore\n", entry->d_name);
|
|
return;
|
|
}
|
|
}
|
|
info.name = entry->d_name;
|
|
module_list->push_back(info);
|
|
});
|
|
if (zygisk_enabled) {
|
|
bool use_memfd = true;
|
|
auto convert_to_memfd = [&](int fd) -> int {
|
|
if (fd < 0)
|
|
return -1;
|
|
if (use_memfd) {
|
|
int memfd = syscall(__NR_memfd_create, "jit-cache", MFD_CLOEXEC);
|
|
if (memfd >= 0) {
|
|
xsendfile(memfd, fd, nullptr, INT_MAX);
|
|
close(fd);
|
|
return memfd;
|
|
} else {
|
|
// memfd_create failed, just use what we had
|
|
use_memfd = false;
|
|
}
|
|
}
|
|
return fd;
|
|
};
|
|
std::for_each(module_list->begin(), module_list->end(), [&](module_info &info) {
|
|
info.z32 = convert_to_memfd(info.z32);
|
|
#if defined(__LP64__)
|
|
info.z64 = convert_to_memfd(info.z64);
|
|
#endif
|
|
});
|
|
}
|
|
}
|
|
|
|
void handle_modules() {
|
|
prepare_modules();
|
|
collect_modules(false);
|
|
exec_module_scripts("post-fs-data");
|
|
|
|
// Recollect modules (module scripts could remove itself)
|
|
module_list->clear();
|
|
collect_modules(true);
|
|
}
|
|
|
|
void disable_modules() {
|
|
foreach_module([](int, auto, int modfd) {
|
|
close(xopenat(modfd, "disable", O_RDONLY | O_CREAT | O_CLOEXEC, 0));
|
|
});
|
|
}
|
|
|
|
void remove_modules() {
|
|
foreach_module([](int, dirent *entry, int) {
|
|
auto uninstaller = MODULEROOT + "/"s + entry->d_name + "/uninstall.sh";
|
|
if (access(uninstaller.data(), F_OK) == 0)
|
|
exec_script(uninstaller.data());
|
|
});
|
|
rm_rf(MODULEROOT);
|
|
}
|
|
|
|
void exec_module_scripts(const char *stage) {
|
|
vector<string_view> module_names;
|
|
std::transform(module_list->begin(), module_list->end(), std::back_inserter(module_names),
|
|
[](const module_info &info) -> string_view { return info.name; });
|
|
exec_module_scripts(stage, module_names);
|
|
}
|