911 lines
23 KiB
C++
911 lines
23 KiB
C++
/* bootstages.c - Core bootstage operations
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*
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* All bootstage operations, including simple mount in post-fs,
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* magisk mount in post-fs-data, various image handling, script
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* execution, load modules, install Magisk Manager etc.
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*/
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#include <stdlib.h>
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#include <stdio.h>
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#include <unistd.h>
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#include <fcntl.h>
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#include <string.h>
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#include <dirent.h>
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#include <sys/mount.h>
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#include <sys/wait.h>
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#include "magisk.h"
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#include "db.h"
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#include "utils.h"
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#include "img.h"
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#include "daemon.h"
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#include "resetprop.h"
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#include "selinux.h"
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#include "flags.h"
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static char buf[PATH_MAX], buf2[PATH_MAX];
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static Vector<CharArray> module_list;
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static bool seperate_vendor;
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char *system_block, *vendor_block, *magiskloop;
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static int bind_mount(const char *from, const char *to);
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extern void auto_start_magiskhide();
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/***************
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* Magic Mount *
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***************/
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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_MODULE 0x08 /* mount from module */
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#define IS_DIR(n) (n->type == DT_DIR)
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#define IS_LNK(n) (n->type == DT_LNK)
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#define IS_REG(n) (n->type == DT_REG)
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class node_entry {
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public:
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node_entry(const char *, uint8_t status = 0, uint8_t type = 0);
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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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node_entry *extract(const char *name);
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private:
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const char *module; /* Only used when status & IS_MODULE */
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const CharArray name;
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uint8_t type;
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uint8_t status;
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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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CharArray get_path();
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node_entry *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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}
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CharArray node_entry::get_path() {
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get_path(buf);
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return buf;
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}
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int node_entry::get_path(char *path) {
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int len = 0;
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if (parent)
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len = parent->get_path(path);
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len += sprintf(path + len, "/%s", name.c_str());
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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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node->parent = this;
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for (auto &child : children) {
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if (child->name == node->name) {
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if (node->status > child->status) {
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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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}
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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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DIR *dir;
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struct dirent *entry;
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CharArray full_path = get_path();
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snprintf(buf, PATH_MAX, "%s/%s%s", MOUNTPOINT, module, full_path.c_str());
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if (!(dir = xopendir(buf)))
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return;
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while ((entry = xreaddir(dir))) {
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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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node_entry *node = new node_entry(module, entry->d_name, entry->d_type);
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snprintf(buf, PATH_MAX, "%s/%s", 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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* 1. File in module is a symlink
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* 2. Target file do not exist
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* 3. Target file is a symlink (exclude /system/vendor)
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*/
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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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struct stat s;
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xstat(buf, &s);
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if (S_ISLNK(s.st_mode))
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clone = true;
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}
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if (clone) {
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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", MOUNTPOINT, 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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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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node->create_module_tree(module);
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}
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}
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closedir(dir);
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}
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void node_entry::clone_skeleton() {
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DIR *dir;
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struct dirent *entry;
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struct node_entry *dummy;
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// Clone the structure
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CharArray full_path = get_path();
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snprintf(buf, PATH_MAX, "%s%s", MIRRDIR, full_path.c_str());
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if (!(dir = xopendir(buf)))
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return;
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while ((entry = xreaddir(dir))) {
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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 dummy node
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dummy = new node_entry(entry->d_name, IS_DUMMY, entry->d_type);
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insert(dummy);
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}
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closedir(dir);
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if (status & IS_SKEL) {
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file_attr attr;
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getattr(full_path, &attr);
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LOGI("mnt_tmpfs : %s\n", full_path.c_str());
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xmount("tmpfs", full_path, "tmpfs", 0, nullptr);
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setattr(full_path, &attr);
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}
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for (auto &child : children) {
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snprintf(buf, PATH_MAX, "%s/%s", full_path.c_str(), child->name.c_str());
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// Create the dummy file/directory
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if (IS_DIR(child))
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xmkdir(buf, 0755);
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else if (IS_REG(child))
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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 (seperate_vendor) {
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cp_afc(MIRRDIR "/system/vendor", "/system/vendor");
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LOGI("copy_link : %s <- %s\n", "/system/vendor", MIRRDIR "/system/vendor");
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}
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// Skip
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continue;
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} else if (child->status & IS_MODULE) {
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// Mount from module file to dummy file
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snprintf(buf2, PATH_MAX, "%s/%s%s/%s", MOUNTPOINT,
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child->module, full_path.c_str(), child->name.c_str());
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} else if (child->status & (IS_SKEL | IS_INTER)) {
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// It's an intermediate folder, recursive clone
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child->clone_skeleton();
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continue;
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} else if (child->status & IS_DUMMY) {
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// Mount from mirror to dummy file
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snprintf(buf2, PATH_MAX, "%s%s/%s", MIRRDIR, full_path.c_str(), child->name.c_str());
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}
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if (IS_LNK(child)) {
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// Copy symlinks directly
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cp_afc(buf2, buf);
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#ifdef MAGISK_DEBUG
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LOGI("copy_link : %s <- %s\n",buf, buf2);
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#else
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LOGI("copy_link : %s\n", buf);
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#endif
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} else {
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snprintf(buf, PATH_MAX, "%s/%s", full_path.c_str(), child->name.c_str());
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bind_mount(buf2, buf);
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}
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}
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}
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void node_entry::magic_mount() {
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if (status & IS_MODULE) {
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// Mount module item
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CharArray real_path = get_path();
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snprintf(buf, PATH_MAX, "%s/%s%s", MOUNTPOINT, module, real_path.c_str());
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bind_mount(buf, real_path);
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} else if (status & IS_SKEL) {
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// The node is labeled to be cloned with skeleton, lets do it
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clone_skeleton();
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} else if (status & IS_INTER) {
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// It's an intermediate node, travel deeper
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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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// 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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for (auto &child : children) {
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if (child->name == name) {
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node = child;
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child = new node_entry(name);
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child->parent = node->parent;
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node->parent = nullptr;
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break;
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}
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}
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return node;
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}
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/***********
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* setenvs *
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***********/
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static void set_path() {
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char buffer[512];
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sprintf(buffer, BBPATH ":%s", getenv("PATH"));
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setenv("PATH", buffer, 1);
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}
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static void set_mirror_path() {
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setenv("PATH", BBPATH ":/sbin:" MIRRDIR "/system/bin:"
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MIRRDIR "/system/xbin:" MIRRDIR "/vendor/bin", 1);
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}
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/***********
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* Scripts *
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***********/
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static void exec_common_script(const char* stage) {
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DIR *dir;
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struct dirent *entry;
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snprintf(buf2, PATH_MAX, "%s/%s.d", SECURE_DIR, stage);
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if (!(dir = xopendir(buf2)))
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return;
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chdir(buf2);
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while ((entry = xreaddir(dir))) {
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if (entry->d_type == DT_REG) {
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if (access(entry->d_name, X_OK) == -1)
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continue;
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LOGI("%s.d: exec [%s]\n", stage, entry->d_name);
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int pid = exec_command(0, nullptr,
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strcmp(stage, "post-fs-data") ? set_path : set_mirror_path,
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"sh", entry->d_name, nullptr);
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if (pid != -1)
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waitpid(pid, nullptr, 0);
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}
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}
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closedir(dir);
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chdir("/");
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}
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static void exec_module_script(const char* stage) {
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for (const char *module : module_list) {
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snprintf(buf2, PATH_MAX, "%s/%s/%s.sh", MOUNTPOINT, module, stage);
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snprintf(buf, PATH_MAX, "%s/%s/disable", MOUNTPOINT, module);
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if (access(buf2, F_OK) == -1 || access(buf, F_OK) == 0)
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continue;
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LOGI("%s: exec [%s.sh]\n", module, stage);
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int pid = exec_command(
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0, nullptr,
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strcmp(stage, "post-fs-data") ? set_path : set_mirror_path,
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"sh", buf2, nullptr);
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if (pid != -1)
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waitpid(pid, nullptr, 0);
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}
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}
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/****************
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* Simple Mount *
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****************/
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static void simple_mount(const char *path) {
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DIR *dir;
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struct dirent *entry;
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snprintf(buf, PATH_MAX, "%s%s", SIMPLEMOUNT, path);
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if (!(dir = opendir(buf)))
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return;
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while ((entry = xreaddir(dir))) {
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if (strcmp(entry->d_name, ".") == 0 || strcmp(entry->d_name, "..") == 0)
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continue;
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// Target file path
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snprintf(buf2, PATH_MAX, "%s/%s", path, entry->d_name);
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// Only mount existing file
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if (access(buf2, F_OK) == -1)
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continue;
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if (entry->d_type == DT_DIR) {
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simple_mount(CharArray(buf2));
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} else if (entry->d_type == DT_REG) {
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// Actual file path
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snprintf(buf, PATH_MAX, "%s%s", SIMPLEMOUNT, buf2);
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// Clone all attributes
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clone_attr(buf2, buf);
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// Finally, mount the file
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bind_mount(buf, buf2);
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}
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}
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closedir(dir);
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}
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/*****************
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* Miscellaneous *
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*****************/
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static int bind_mount(const char *from, const char *to) {
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int ret = xmount(from, to, nullptr, MS_BIND, nullptr);
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#ifdef MAGISK_DEBUG
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LOGI("bind_mount: %s <- %s\n", to, from);
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#else
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LOGI("bind_mount: %s\n", to);
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#endif
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return ret;
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}
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static bool magisk_env() {
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LOGI("* Initializing Magisk environment\n");
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// Alternative binaries paths
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const char *alt_bin[] = { "/cache/data_bin", "/data/magisk",
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"/data/data/com.topjohnwu.magisk/install",
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"/data/user_de/0/com.topjohnwu.magisk/install" };
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for (auto &alt : alt_bin) {
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struct stat st;
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if (lstat(alt, &st) != -1) {
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if (S_ISLNK(st.st_mode)) {
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unlink(alt);
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continue;
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}
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rm_rf(DATABIN);;
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cp_afc(alt, DATABIN);
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rm_rf(alt);
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break;
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}
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}
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// Remove legacy stuffs
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unlink("/data/magisk.img");
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unlink("/data/magisk_debug.log");
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// Symlink for legacy path users
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symlink(MAGISKTMP, "/sbin/.core");
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// Create directories in tmpfs overlay
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xmkdirs(MIRRDIR "/system", 0755);
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xmkdir(MIRRDIR "/bin", 0755);
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xmkdir(BBPATH, 0755);
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xmkdir(MOUNTPOINT, 0755);
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xmkdir(BLOCKDIR, 0755);
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// Boot script directories
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xmkdir(SECURE_DIR "/post-fs-data.d", 0755);
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xmkdir(SECURE_DIR "/service.d", 0755);
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LOGI("* Mounting mirrors");
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Vector<CharArray> mounts;
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file_to_vector("/proc/mounts", mounts);
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bool system_as_root = false;
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for (auto &line : mounts) {
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if (line.contains(" /system_root ")) {
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bind_mount("/system_root/system", MIRRDIR "/system");
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sscanf(line, "%s", buf);
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system_block = strdup2(buf);
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system_as_root = true;
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} else if (!system_as_root && line.contains(" /system ")) {
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sscanf(line, "%s %*s %s", buf, buf2);
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system_block = strdup2(buf);
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xmount(system_block, MIRRDIR "/system", buf2, MS_RDONLY, nullptr);
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#ifdef MAGISK_DEBUG
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LOGI("mount: %s <- %s\n", MIRRDIR "/system", buf);
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#else
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LOGI("mount: %s\n", MIRRDIR "/system");
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#endif
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} else if (line.contains(" /vendor ")) {
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seperate_vendor = true;
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sscanf(line, "%s %*s %s", buf, buf2);
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vendor_block = strdup2(buf);
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xmkdir(MIRRDIR "/vendor", 0755);
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xmount(buf, MIRRDIR "/vendor", buf2, MS_RDONLY, nullptr);
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#ifdef MAGISK_DEBUG
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LOGI("mount: %s <- %s\n", MIRRDIR "/vendor", buf);
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#else
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LOGI("mount: %s\n", MIRRDIR "/vendor");
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#endif
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}
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}
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if (!seperate_vendor) {
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xsymlink(MIRRDIR "/system/vendor", MIRRDIR "/vendor");
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#ifdef MAGISK_DEBUG
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LOGI("link: %s <- %s\n", MIRRDIR "/vendor", MIRRDIR "/system/vendor");
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#else
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LOGI("link: %s\n", MIRRDIR "/vendor");
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#endif
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}
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xmkdirs(DATABIN, 0755);
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bind_mount(DATABIN, MIRRDIR "/bin");
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if (access(MIRRDIR "/bin/busybox", X_OK) == -1)
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return false;
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LOGI("* Setting up internal busybox");
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exec_command_sync(MIRRDIR "/bin/busybox", "--install", "-s", BBPATH, nullptr);
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xsymlink(MIRRDIR "/bin/busybox", BBPATH "/busybox");
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return true;
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}
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static bool prepare_img() {
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const char *alt_img[] =
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{ "/cache/magisk.img", "/data/magisk_merge.img", "/data/adb/magisk_merge.img" };
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for (auto &alt : alt_img) {
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if (merge_img(alt, MAINIMG)) {
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LOGE("Image merge %s -> " MAINIMG " failed!\n", alt);
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return false;
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}
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}
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if (access(MAINIMG, F_OK) == -1) {
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if (create_img(MAINIMG, 64))
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return false;
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}
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LOGI("* Mounting " MAINIMG "\n");
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magiskloop = mount_image(MAINIMG, MOUNTPOINT);
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if (magiskloop == nullptr)
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return false;
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// Migrate legacy boot scripts
|
|
struct stat st;
|
|
if (lstat(LEGACY_CORE "/post-fs-data.d", &st) == 0 && S_ISDIR(st.st_mode)) {
|
|
cp_afc(LEGACY_CORE "/post-fs-data.d", SECURE_DIR "/post-fs-data.d");
|
|
rm_rf(LEGACY_CORE "/post-fs-data.d");
|
|
}
|
|
if (lstat(LEGACY_CORE "/service.d", &st) == 0 && S_ISDIR(st.st_mode)) {
|
|
cp_afc(LEGACY_CORE "/service.d", SECURE_DIR "/service.d");
|
|
rm_rf(LEGACY_CORE "/service.d");
|
|
}
|
|
|
|
// Links for legacy paths
|
|
xmkdir(LEGACY_CORE, 0755);
|
|
symlink(SECURE_DIR "/post-fs-data.d", LEGACY_CORE "/post-fs-data.d");
|
|
symlink(SECURE_DIR "/service.d", LEGACY_CORE "/service.d");
|
|
|
|
DIR *dir = xopendir(MOUNTPOINT);
|
|
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 ||
|
|
strcmp(entry->d_name, "lost+found") == 0)
|
|
continue;
|
|
snprintf(buf, PATH_MAX, "%s/%s", MOUNTPOINT, entry->d_name);
|
|
chdir(buf);
|
|
if (access("remove", F_OK) == 0) {
|
|
chdir("..");
|
|
rm_rf(buf);
|
|
continue;
|
|
}
|
|
unlink("update");
|
|
if (access("disable", F_OK) == 0)
|
|
continue;
|
|
module_list.push_back(entry->d_name);
|
|
}
|
|
}
|
|
closedir(dir);
|
|
chdir("/");
|
|
|
|
return trim_img(MAINIMG, MOUNTPOINT, magiskloop) == 0;
|
|
}
|
|
|
|
static void install_apk(const char *apk) {
|
|
setfilecon(apk, "u:object_r:" SEPOL_FILE_DOMAIN ":s0");
|
|
while (1) {
|
|
sleep(5);
|
|
LOGD("apk_install: attempting to install APK");
|
|
int apk_res = -1, pid;
|
|
pid = exec_command(1, &apk_res, nullptr, "/system/bin/pm", "install", "-r", apk, nullptr);
|
|
if (pid != -1) {
|
|
int err = 0;
|
|
while (fdgets(buf, PATH_MAX, apk_res) > 0) {
|
|
LOGD("apk_install: %s", buf);
|
|
err |= strstr(buf, "Error:") != nullptr;
|
|
}
|
|
waitpid(pid, nullptr, 0);
|
|
close(apk_res);
|
|
// Keep trying until pm is started
|
|
if (err)
|
|
continue;
|
|
break;
|
|
}
|
|
}
|
|
unlink(apk);
|
|
}
|
|
|
|
static bool check_data() {
|
|
bool mnt = false;
|
|
bool data = false;
|
|
Vector<CharArray> mounts;
|
|
file_to_vector("/proc/mounts", mounts);
|
|
for (auto &line : mounts) {
|
|
if (line.contains(" /data ") && !line.contains("tmpfs"))
|
|
mnt = true;
|
|
}
|
|
if (mnt) {
|
|
CharArray crypto = getprop("ro.crypto.state");
|
|
if (!crypto.empty()) {
|
|
if (crypto == "unencrypted") {
|
|
// Unencrypted, we can directly access data
|
|
data = true;
|
|
} else {
|
|
// Encrypted, check whether vold is started
|
|
data = !getprop("init.svc.vold").empty();
|
|
}
|
|
} else {
|
|
// ro.crypto.state is not set, assume it's unencrypted
|
|
data = true;
|
|
}
|
|
}
|
|
return data;
|
|
}
|
|
|
|
void unlock_blocks() {
|
|
DIR *dir;
|
|
struct dirent *entry;
|
|
int fd, dev, OFF = 0;
|
|
|
|
if ((dev = xopen("/dev/block", O_RDONLY | O_CLOEXEC)) < 0)
|
|
return;
|
|
dir = xfdopendir(dev);
|
|
|
|
while((entry = readdir(dir))) {
|
|
if (entry->d_type == DT_BLK) {
|
|
if ((fd = openat(dev, entry->d_name, O_RDONLY)) < 0)
|
|
continue;
|
|
if (ioctl(fd, BLKROSET, &OFF) == -1)
|
|
PLOGE("unlock %s", entry->d_name);
|
|
close(fd);
|
|
}
|
|
}
|
|
close(dev);
|
|
}
|
|
|
|
/****************
|
|
* Entry points *
|
|
****************/
|
|
|
|
[[noreturn]] static void unblock_boot_process() {
|
|
close(xopen(UNBLOCKFILE, O_RDONLY | O_CREAT, 0));
|
|
pthread_exit(nullptr);
|
|
}
|
|
|
|
static const char wrapper[] =
|
|
"#!/system/bin/sh\n"
|
|
"unset LD_LIBRARY_PATH\n"
|
|
"unset LD_PRELOAD\n"
|
|
"exec /sbin/magisk.bin \"${0##*/}\" \"$@\"\n";
|
|
|
|
void startup() {
|
|
android_logging();
|
|
if (!check_data())
|
|
unblock_boot_process();
|
|
|
|
if (access(SECURE_DIR, F_OK) != 0) {
|
|
/* If the folder is not automatically created by the system,
|
|
* do NOT proceed further. Manual creation of the folder
|
|
* will cause bootloops on FBE devices. */
|
|
LOGE(SECURE_DIR " is not present, abort...");
|
|
unblock_boot_process();
|
|
}
|
|
|
|
#if 0
|
|
// Increment boot count
|
|
int boot_count = 0;
|
|
FILE *cf = fopen(BOOTCOUNT, "r");
|
|
if (cf) {
|
|
fscanf(cf, "%d", &boot_count);
|
|
fclose(cf);
|
|
}
|
|
boot_count++;
|
|
if (boot_count > 2)
|
|
creat(DISABLEFILE, 0644);
|
|
cf = xfopen(BOOTCOUNT, "w");
|
|
fprintf(cf, "%d", boot_count);
|
|
fclose(cf);
|
|
#endif
|
|
|
|
// No uninstaller or core-only mode
|
|
if (access(DISABLEFILE, F_OK) != 0) {
|
|
simple_mount("/system");
|
|
simple_mount("/vendor");
|
|
}
|
|
|
|
// Unlock all blocks for rw
|
|
unlock_blocks();
|
|
|
|
LOGI("* Creating /sbin overlay");
|
|
DIR *dir;
|
|
struct dirent *entry;
|
|
int root, sbin, fd;
|
|
void *magisk, *init;
|
|
size_t magisk_size, init_size;
|
|
|
|
xmount(nullptr, "/", nullptr, MS_REMOUNT, nullptr);
|
|
|
|
// GSIs will have to override /sbin/adbd with /system/bin/adbd
|
|
if (access("/sbin/adbd", F_OK) == 0 && access("/system/bin/adbd", F_OK) == 0) {
|
|
umount2("/sbin/adbd", MNT_DETACH);
|
|
cp_afc("/system/bin/adbd", "/sbin/adbd");
|
|
}
|
|
|
|
// Create hardlink mirror of /sbin to /root
|
|
mkdir("/root", 0750);
|
|
clone_attr("/sbin", "/root");
|
|
full_read("/sbin/magisk", &magisk, &magisk_size);
|
|
unlink("/sbin/magisk");
|
|
full_read("/sbin/magiskinit", &init, &init_size);
|
|
unlink("/sbin/magiskinit");
|
|
root = xopen("/root", O_RDONLY | O_CLOEXEC);
|
|
sbin = xopen("/sbin", O_RDONLY | O_CLOEXEC);
|
|
link_dir(sbin, root);
|
|
close(sbin);
|
|
|
|
// Mount the /sbin tmpfs overlay
|
|
xmount("tmpfs", "/sbin", "tmpfs", 0, nullptr);
|
|
chmod("/sbin", 0755);
|
|
setfilecon("/sbin", "u:object_r:rootfs:s0");
|
|
sbin = xopen("/sbin", O_RDONLY | O_CLOEXEC);
|
|
|
|
// Remove some traces of Magisk
|
|
unlink(MAGISKRC);
|
|
mkdir(MAGISKTMP, 0755);
|
|
cp_afc("/.backup/.magisk", MAGISKTMP "/config");
|
|
rm_rf("/.backup");
|
|
|
|
// Create applet symlinks
|
|
for (int i = 0; applet_names[i]; ++i) {
|
|
snprintf(buf, PATH_MAX, "/sbin/%s", applet_names[i]);
|
|
xsymlink("/sbin/magisk", buf);
|
|
}
|
|
|
|
// Setup binary and wrapper
|
|
fd = creat("/sbin/magisk.bin", 0755);
|
|
xwrite(fd, magisk, magisk_size);
|
|
close(fd);
|
|
free(magisk);
|
|
unlink("/sbin/magisk");
|
|
fd = creat("/sbin/magisk", 0755);
|
|
xwrite(fd, wrapper, sizeof(wrapper) - 1);
|
|
close(fd);
|
|
setfilecon("/sbin/magisk.bin", "u:object_r:" SEPOL_FILE_DOMAIN ":s0");
|
|
setfilecon("/sbin/magisk", "u:object_r:" SEPOL_FILE_DOMAIN ":s0");
|
|
|
|
// Setup magiskinit symlinks
|
|
fd = creat("/sbin/magiskinit", 0755);
|
|
xwrite(fd, init, init_size);
|
|
close(fd);
|
|
free(init);
|
|
setfilecon("/sbin/magiskinit", "u:object_r:" SEPOL_FILE_DOMAIN ":s0");
|
|
for (int i = 0; init_applet[i]; ++i) {
|
|
snprintf(buf, PATH_MAX, "/sbin/%s", init_applet[i]);
|
|
xsymlink("/sbin/magiskinit", buf);
|
|
}
|
|
|
|
// Create symlinks pointing back to /root
|
|
dir = xfdopendir(root);
|
|
while((entry = xreaddir(dir))) {
|
|
if (strcmp(entry->d_name, ".") == 0 || strcmp(entry->d_name, "..") == 0) continue;
|
|
snprintf(buf, PATH_MAX, "/root/%s", entry->d_name);
|
|
xsymlinkat(buf, sbin, entry->d_name);
|
|
}
|
|
|
|
close(sbin);
|
|
close(root);
|
|
|
|
// Start post-fs-data mode
|
|
execl("/sbin/magisk.bin", "magisk", "--post-fs-data", nullptr);
|
|
}
|
|
|
|
[[noreturn]] static void core_only() {
|
|
auto_start_magiskhide();
|
|
unblock_boot_process();
|
|
}
|
|
|
|
void post_fs_data(int client) {
|
|
// ack
|
|
write_int(client, 0);
|
|
close(client);
|
|
|
|
xmount(nullptr, "/", nullptr, MS_REMOUNT | MS_RDONLY, nullptr);
|
|
|
|
LOGI("** post-fs-data mode running\n");
|
|
|
|
if (!magisk_env()) {
|
|
LOGE("* Magisk environment setup incomplete, abort\n");
|
|
unblock_boot_process();
|
|
}
|
|
|
|
start_log_daemon();
|
|
|
|
if (!prepare_img()) {
|
|
LOGE("* Magisk image mount failed, switch to core-only mode\n");
|
|
free(magiskloop);
|
|
magiskloop = nullptr;
|
|
creat(DISABLEFILE, 0644);
|
|
}
|
|
|
|
restorecon();
|
|
chmod(SECURE_DIR, 0700);
|
|
|
|
// Run common scripts
|
|
LOGI("* Running post-fs-data.d scripts\n");
|
|
exec_common_script("post-fs-data");
|
|
|
|
// Core only mode
|
|
if (access(DISABLEFILE, F_OK) == 0)
|
|
core_only();
|
|
|
|
// Execute module scripts
|
|
LOGI("* Running module post-fs-data scripts\n");
|
|
exec_module_script("post-fs-data");
|
|
|
|
// Create the system root entry
|
|
node_entry *sys_root = new node_entry("system", IS_INTER);
|
|
|
|
// Vendor root entry
|
|
node_entry *ven_root = nullptr;
|
|
|
|
bool has_modules = false;
|
|
|
|
LOGI("* Loading modules\n");
|
|
for (const char *module : module_list) {
|
|
// Read props
|
|
snprintf(buf, PATH_MAX, "%s/%s/system.prop", MOUNTPOINT, module);
|
|
if (access(buf, F_OK) == 0) {
|
|
LOGI("%s: loading [system.prop]\n", module);
|
|
load_prop_file(buf, 0);
|
|
}
|
|
// Check whether enable auto_mount
|
|
snprintf(buf, PATH_MAX, "%s/%s/auto_mount", MOUNTPOINT, module);
|
|
if (access(buf, F_OK) == -1)
|
|
continue;
|
|
// Double check whether the system folder exists
|
|
snprintf(buf, PATH_MAX, "%s/%s/system", MOUNTPOINT, module);
|
|
if (access(buf, F_OK) == -1)
|
|
continue;
|
|
|
|
// Construct structure
|
|
has_modules = true;
|
|
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", MOUNTPOINT, module);
|
|
if (access(buf, F_OK) == 0) {
|
|
snprintf(buf2, PATH_MAX, "%s/%s/vendor", MOUNTPOINT, module);
|
|
unlink(buf2);
|
|
xsymlink(buf, buf2);
|
|
}
|
|
sys_root->create_module_tree(module);
|
|
}
|
|
|
|
if (has_modules) {
|
|
// Pull out /system/vendor node if exist
|
|
ven_root = sys_root->extract("vendor");
|
|
|
|
// Magic!!
|
|
sys_root->magic_mount();
|
|
if (ven_root) ven_root->magic_mount();
|
|
}
|
|
|
|
// Cleanup memory
|
|
delete sys_root;
|
|
delete ven_root;
|
|
|
|
core_only();
|
|
}
|
|
|
|
void late_start(int client) {
|
|
LOGI("** late_start service mode running\n");
|
|
// ack
|
|
write_int(client, 0);
|
|
close(client);
|
|
|
|
if (access(SECURE_DIR, F_OK) != 0) {
|
|
// It's safe to create the folder at this point if the system didn't create it
|
|
xmkdir(SECURE_DIR, 0700);
|
|
// And reboot to make proper setup possible
|
|
exec_command_sync("/system/bin/reboot", nullptr);
|
|
}
|
|
|
|
auto_start_magiskhide();
|
|
|
|
// Run scripts after full patch, most reliable way to run scripts
|
|
LOGI("* Running service.d scripts\n");
|
|
exec_common_script("service");
|
|
|
|
// Core only mode
|
|
if (access(DISABLEFILE, F_OK) == 0)
|
|
goto core_only;
|
|
|
|
LOGI("* Running module service scripts\n");
|
|
exec_module_script("service");
|
|
|
|
core_only:
|
|
if (access(MANAGERAPK, F_OK) == 0) {
|
|
// Install Magisk Manager if exists
|
|
rename(MANAGERAPK, "/data/magisk.apk");
|
|
install_apk("/data/magisk.apk");
|
|
} else {
|
|
// Check whether we have a valid manager installed
|
|
db_strings str;
|
|
get_db_strings(&str, SU_MANAGER);
|
|
if (validate_manager(str[SU_MANAGER], 0, nullptr)) {
|
|
// There is no manager installed, install the stub
|
|
exec_command_sync("/sbin/magiskinit", "-x", "manager", "/data/magisk.apk", nullptr);
|
|
install_apk("/data/magisk.apk");
|
|
}
|
|
}
|
|
|
|
// All boot stage done, cleanup
|
|
module_list.clear(true);
|
|
}
|
|
|
|
void boot_complete(int client) {
|
|
LOGI("** boot_complete triggered\n");
|
|
// ack
|
|
write_int(client, 0);
|
|
close(client);
|
|
|
|
unlink(BOOTCOUNT);
|
|
}
|