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topjohnwu
+116
-116
@@ -24,163 +24,163 @@ using namespace std;
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#define ENABLE_TEST 0
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constexpr int (*init_applet_main[])(int, char *[]) =
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{ magiskpolicy_main, magiskpolicy_main, nullptr };
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{ magiskpolicy_main, magiskpolicy_main, nullptr };
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static bool unxz(int fd, const uint8_t *buf, size_t size) {
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uint8_t out[8192];
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xz_crc32_init();
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struct xz_dec *dec = xz_dec_init(XZ_DYNALLOC, 1 << 26);
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struct xz_buf b = {
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.in = buf,
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.in_pos = 0,
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.in_size = size,
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.out = out,
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.out_pos = 0,
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.out_size = sizeof(out)
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};
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enum xz_ret ret;
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do {
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ret = xz_dec_run(dec, &b);
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if (ret != XZ_OK && ret != XZ_STREAM_END)
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return false;
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write(fd, out, b.out_pos);
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b.out_pos = 0;
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} while (b.in_pos != size);
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return true;
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uint8_t out[8192];
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xz_crc32_init();
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struct xz_dec *dec = xz_dec_init(XZ_DYNALLOC, 1 << 26);
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struct xz_buf b = {
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.in = buf,
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.in_pos = 0,
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.in_size = size,
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.out = out,
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.out_pos = 0,
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.out_size = sizeof(out)
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};
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enum xz_ret ret;
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do {
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ret = xz_dec_run(dec, &b);
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if (ret != XZ_OK && ret != XZ_STREAM_END)
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return false;
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write(fd, out, b.out_pos);
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b.out_pos = 0;
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} while (b.in_pos != size);
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return true;
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}
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int dump_magisk(const char *path, mode_t mode) {
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int fd = xopen(path, O_WRONLY | O_CREAT | O_TRUNC | O_CLOEXEC, mode);
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if (fd < 0)
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return 1;
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if (!unxz(fd, magisk_xz, sizeof(magisk_xz)))
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return 1;
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close(fd);
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return 0;
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int fd = xopen(path, O_WRONLY | O_CREAT | O_TRUNC | O_CLOEXEC, mode);
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if (fd < 0)
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return 1;
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if (!unxz(fd, magisk_xz, sizeof(magisk_xz)))
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return 1;
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close(fd);
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return 0;
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}
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static int dump_manager(const char *path, mode_t mode) {
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int fd = xopen(path, O_WRONLY | O_CREAT | O_TRUNC | O_CLOEXEC, mode);
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if (fd < 0)
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return 1;
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if (!unxz(fd, manager_xz, sizeof(manager_xz)))
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return 1;
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close(fd);
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return 0;
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int fd = xopen(path, O_WRONLY | O_CREAT | O_TRUNC | O_CLOEXEC, mode);
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if (fd < 0)
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return 1;
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if (!unxz(fd, manager_xz, sizeof(manager_xz)))
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return 1;
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close(fd);
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return 0;
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}
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class RecoveryInit : public BaseInit {
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public:
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RecoveryInit(char *argv[], cmdline *cmd) : BaseInit(argv, cmd) {}
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void start() override {
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LOGD("Ramdisk is recovery, abort\n");
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rename("/.backup/init", "/init");
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rm_rf("/.backup");
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exec_init();
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}
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RecoveryInit(char *argv[], cmdline *cmd) : BaseInit(argv, cmd) {}
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void start() override {
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LOGD("Ramdisk is recovery, abort\n");
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rename("/.backup/init", "/init");
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rm_rf("/.backup");
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exec_init();
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}
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};
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#if ENABLE_TEST
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class TestInit : public BaseInit {
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public:
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TestInit(char *argv[], cmdline *cmd) : BaseInit(argv, cmd) {};
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void start() override {
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// Place init tests here
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}
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TestInit(char *argv[], cmdline *cmd) : BaseInit(argv, cmd) {};
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void start() override {
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// Place init tests here
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}
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};
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static int test_main(int argc, char *argv[]) {
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// Log to console
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cmdline_logging();
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log_cb.ex = nop_ex;
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// Log to console
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cmdline_logging();
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log_cb.ex = nop_ex;
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// Switch to isolate namespace
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xunshare(CLONE_NEWNS);
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xmount(nullptr, "/", nullptr, MS_PRIVATE | MS_REC, nullptr);
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// Switch to isolate namespace
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xunshare(CLONE_NEWNS);
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xmount(nullptr, "/", nullptr, MS_PRIVATE | MS_REC, nullptr);
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// Unmount everything in reverse
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vector<string> mounts;
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parse_mnt("/proc/mounts", [&](mntent *me) {
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if (me->mnt_dir != "/"sv)
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mounts.emplace_back(me->mnt_dir);
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return true;
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});
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for (auto &m : reversed(mounts))
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xumount(m.data());
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// Unmount everything in reverse
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vector<string> mounts;
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parse_mnt("/proc/mounts", [&](mntent *me) {
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if (me->mnt_dir != "/"sv)
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mounts.emplace_back(me->mnt_dir);
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return true;
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});
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for (auto &m : reversed(mounts))
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xumount(m.data());
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// chroot jail
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chdir(dirname(argv[0]));
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chroot(".");
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chdir("/");
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// chroot jail
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chdir(dirname(argv[0]));
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chroot(".");
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chdir("/");
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cmdline cmd{};
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load_kernel_info(&cmd);
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cmdline cmd{};
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load_kernel_info(&cmd);
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auto init = make_unique<TestInit>(argv, &cmd);
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init->start();
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auto init = make_unique<TestInit>(argv, &cmd);
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init->start();
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return 1;
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return 1;
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}
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#endif // ENABLE_TEST
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static int magisk_proxy_main(int argc, char *argv[]) {
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setup_klog();
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auto init = make_unique<MagiskProxy>(argv);
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init->start();
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return 1;
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setup_klog();
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auto init = make_unique<MagiskProxy>(argv);
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init->start();
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return 1;
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}
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int main(int argc, char *argv[]) {
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umask(0);
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umask(0);
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auto name = basename(argv[0]);
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if (name == "magisk"sv)
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return magisk_proxy_main(argc, argv);
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for (int i = 0; init_applet[i]; ++i) {
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if (strcmp(name, init_applet[i]) == 0)
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return (*init_applet_main[i])(argc, argv);
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}
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auto name = basename(argv[0]);
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if (name == "magisk"sv)
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return magisk_proxy_main(argc, argv);
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for (int i = 0; init_applet[i]; ++i) {
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if (strcmp(name, init_applet[i]) == 0)
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return (*init_applet_main[i])(argc, argv);
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}
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#if ENABLE_TEST
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if (getenv("INIT_TEST") != nullptr)
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return test_main(argc, argv);
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if (getenv("INIT_TEST") != nullptr)
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return test_main(argc, argv);
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#endif
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if (argc > 1 && argv[1] == "-x"sv) {
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if (argv[2] == "magisk"sv)
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return dump_magisk(argv[3], 0755);
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else if (argv[2] == "manager"sv)
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return dump_manager(argv[3], 0644);
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}
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if (argc > 1 && argv[1] == "-x"sv) {
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if (argv[2] == "magisk"sv)
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return dump_magisk(argv[3], 0755);
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else if (argv[2] == "manager"sv)
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return dump_manager(argv[3], 0644);
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}
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if (getpid() != 1)
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return 1;
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if (getpid() != 1)
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return 1;
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BaseInit *init;
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cmdline cmd{};
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BaseInit *init;
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cmdline cmd{};
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if (argc > 1 && argv[1] == "selinux_setup"sv) {
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setup_klog();
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init = new SecondStageInit(argv);
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} else {
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// This will also mount /sys and /proc
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load_kernel_info(&cmd);
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if (argc > 1 && argv[1] == "selinux_setup"sv) {
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setup_klog();
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init = new SecondStageInit(argv);
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} else {
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// This will also mount /sys and /proc
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load_kernel_info(&cmd);
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if (cmd.skip_initramfs) {
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init = new SARInit(argv, &cmd);
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} else {
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if (cmd.force_normal_boot)
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init = new FirstStageInit(argv, &cmd);
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else if (access("/sbin/recovery", F_OK) == 0 || access("/system/bin/recovery", F_OK) == 0)
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init = new RecoveryInit(argv, &cmd);
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else if (check_two_stage())
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init = new FirstStageInit(argv, &cmd);
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else
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init = new RootFSInit(argv, &cmd);
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}
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}
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if (cmd.skip_initramfs) {
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init = new SARInit(argv, &cmd);
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} else {
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if (cmd.force_normal_boot)
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init = new FirstStageInit(argv, &cmd);
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else if (access("/sbin/recovery", F_OK) == 0 || access("/system/bin/recovery", F_OK) == 0)
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init = new RecoveryInit(argv, &cmd);
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else if (check_two_stage())
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init = new FirstStageInit(argv, &cmd);
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else
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init = new RootFSInit(argv, &cmd);
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}
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}
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// Run the main routine
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init->start();
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exit(1);
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// Run the main routine
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init->start();
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exit(1);
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}
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