forked from MarcoBuster/Magisk
156 lines
2.9 KiB
C++
156 lines
2.9 KiB
C++
#include <sys/mount.h>
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#include <unistd.h>
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#include <stdlib.h>
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#include <vector>
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#include <magisk.hpp>
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struct cmdline {
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bool skip_initramfs;
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bool force_normal_boot;
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char slot[3];
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char dt_dir[128];
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};
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struct raw_data {
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uint8_t *buf = nullptr;
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size_t sz = 0;
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raw_data() = default;
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raw_data(const raw_data&) = delete;
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raw_data(raw_data &&d) {
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buf = d.buf;
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sz = d.sz;
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d.buf = nullptr;
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d.sz = 0;
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}
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~raw_data() {
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free(buf);
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}
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};
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/* *************
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* Base classes
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* *************/
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class BaseInit {
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protected:
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cmdline *cmd;
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char **argv;
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std::vector<std::string> mount_list;
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void exec_init(const char *init = "/init") {
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cleanup();
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execv(init, argv);
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exit(1);
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}
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virtual void cleanup();
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public:
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BaseInit(char *argv[], cmdline *cmd) :
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cmd(cmd), argv(argv), mount_list{"/sys", "/proc"} {}
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virtual ~BaseInit() = default;
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virtual void start() = 0;
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};
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class MagiskInit : public BaseInit {
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protected:
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raw_data self;
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const char *persist_dir;
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virtual void early_mount() = 0;
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bool patch_sepolicy(const char *file = "/sepolicy");
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public:
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MagiskInit(char *argv[], cmdline *cmd) : BaseInit(argv, cmd) {};
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};
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class SARBase : public MagiskInit {
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protected:
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raw_data config;
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dev_t system_dev;
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void backup_files(const char *self_path);
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void patch_rootdir();
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public:
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SARBase(char *argv[], cmdline *cmd) : MagiskInit(argv, cmd) {
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persist_dir = MIRRDIR "/persist/magisk";
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}
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void start() override {
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early_mount();
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patch_rootdir();
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exec_init();
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}
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};
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/* *************
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* 2 Stage Init
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* *************/
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class ABFirstStageInit : public BaseInit {
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private:
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void prepare();
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public:
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ABFirstStageInit(char *argv[], cmdline *cmd) : BaseInit(argv, cmd) {};
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void start() override {
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prepare();
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exec_init("/system/bin/init");
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}
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};
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class AFirstStageInit : public BaseInit {
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private:
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void prepare();
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public:
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AFirstStageInit(char *argv[], cmdline *cmd) : BaseInit(argv, cmd) {};
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void start() override {
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prepare();
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exec_init();
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}
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};
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class SecondStageInit : public SARBase {
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protected:
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void early_mount() override;
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void cleanup() override { /* Do not do any cleanup */ }
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public:
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SecondStageInit(char *argv[]) : SARBase(argv, nullptr) {};
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};
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/* ***********
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* Legacy SAR
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* ***********/
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class SARInit : public SARBase {
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protected:
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void early_mount() override;
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public:
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SARInit(char *argv[], cmdline *cmd) : SARBase(argv, cmd) {};
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};
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/* **********
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* Initramfs
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* **********/
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class RootFSInit : public MagiskInit {
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private:
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int root = -1;
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void setup_rootfs();
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protected:
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void early_mount() override;
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public:
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RootFSInit(char *argv[], cmdline *cmd) : MagiskInit(argv, cmd) {
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persist_dir = "/dev/mnt/persist/magisk";
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}
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void start() override {
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early_mount();
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setup_rootfs();
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exec_init();
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}
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};
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void load_kernel_info(cmdline *cmd);
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int dump_magisk(const char *path, mode_t mode);
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int magisk_proxy_main(int argc, char *argv[]);
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void setup_klog();
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void mount_sbin();
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