forked from MarcoBuster/Magisk
147 lines
2.8 KiB
C++
147 lines
2.8 KiB
C++
#include <sys/mount.h>
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#include <unistd.h>
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#include <stdlib.h>
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struct cmdline {
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bool system_as_root;
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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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void *buf;
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size_t sz;
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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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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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umount("/sys");
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umount("/proc");
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umount("/dev");
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}
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public:
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BaseInit(char *argv[], cmdline *cmd) : cmd(cmd), argv(argv) {}
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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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bool mnt_system = false;
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bool mnt_vendor = false;
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bool mnt_product = false;
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bool mnt_odm = false;
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virtual void early_mount() = 0;
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bool read_dt_fstab(const char *name, char *partname, char *fstype);
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bool patch_sepolicy(const char *file = "/sepolicy");
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void cleanup() override;
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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 RootFSInit : public MagiskInit {
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protected:
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int root = -1;
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virtual void setup_rootfs();
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public:
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RootFSInit(char *argv[], cmdline *cmd) : MagiskInit(argv, cmd) {};
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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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class SARCommon : 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 patch_rootdir();
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public:
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SARCommon(char *argv[], cmdline *cmd) : MagiskInit(argv, cmd) {};
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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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* Logical Partitions
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* *******************/
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class FirstStageInit : public BaseInit {
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protected:
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void patch_fstab();
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public:
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FirstStageInit(char *argv[], cmdline *cmd) : BaseInit(argv, cmd) {};
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void start() override {
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patch_fstab();
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exec_init("/system/bin/init");
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}
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};
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class SecondStageInit : public SARCommon {
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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[]) : SARCommon(argv, nullptr) {};
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};
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/* ***********
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* Normal SAR
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* ***********/
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class SARInit : public SARCommon {
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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) : SARCommon(argv, cmd) {};
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};
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/* **********
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* Initramfs
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* **********/
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class LegacyInit : public RootFSInit {
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protected:
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void early_mount() override;
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public:
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LegacyInit(char *argv[], cmdline *cmd) : RootFSInit(argv, cmd) {};
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};
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/* ****************
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* Compat-mode SAR
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* ****************/
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class SARCompatInit : public RootFSInit {
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protected:
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void early_mount() override;
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void setup_rootfs() override;
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public:
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SARCompatInit(char *argv[], cmdline *cmd) : RootFSInit(argv, cmd) {};
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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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