89 lines
2.7 KiB
C++
89 lines
2.7 KiB
C++
#include <dlfcn.h>
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#include <unistd.h>
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#include <fcntl.h>
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#include <cstring>
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#include <cstdio>
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#include <android/log.h>
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#include "zygisk.hpp"
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#define LOG_TAG "CamSwapperZygisk"
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#define ALOGI(...) __android_log_print(ANDROID_LOG_INFO, LOG_TAG, __VA_ARGS__)
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#define ALOGE(...) __android_log_print(ANDROID_LOG_ERROR, LOG_TAG, __VA_ARGS__)
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#define HOOK_LIB_PATH "/data/local/camera_magic/libcamera_hook.so"
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using zygisk::Api;
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using zygisk::AppSpecializeArgs;
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using zygisk::ServerSpecializeArgs;
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static bool is_camera_process(const char *process_name) {
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if (!process_name) return false;
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return (strstr(process_name, "cameraserver") != nullptr) ||
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(strstr(process_name, "camera.provider") != nullptr) ||
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(strstr(process_name, "android.hardware.camera") != nullptr);
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}
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class CamSwapperModule : public zygisk::ModuleBase {
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public:
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void onLoad(Api *api, JNIEnv *env) override {
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this->api = api;
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this->env = env;
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ALOGI("CamSwapper Zygisk module loaded");
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}
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void preAppSpecialize(AppSpecializeArgs *args) override {
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if (args && args->nice_name) {
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const char *process = env->GetStringUTFChars(args->nice_name, nullptr);
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if (process) {
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ALOGI("preAppSpecialize: %s", process);
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env->ReleaseStringUTFChars(args->nice_name, process);
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}
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}
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}
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void postAppSpecialize(const AppSpecializeArgs *args) override {
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if (args && args->nice_name) {
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const char *process = env->GetStringUTFChars(args->nice_name, nullptr);
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if (process) {
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ALOGI("postAppSpecialize: %s", process);
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if (is_camera_process(process)) {
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ALOGI("Loading hook in camera app: %s", process);
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load_hook_lib();
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}
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env->ReleaseStringUTFChars(args->nice_name, process);
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}
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}
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}
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void preServerSpecialize(ServerSpecializeArgs *args) override {
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ALOGI("preServerSpecialize: system_server");
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}
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void postServerSpecialize(const ServerSpecializeArgs *args) override {
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ALOGI("postServerSpecialize: system_server ready, loading hook");
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load_hook_lib();
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}
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private:
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Api *api;
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JNIEnv *env;
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void load_hook_lib() {
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struct stat st;
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if (stat(HOOK_LIB_PATH, &st) != 0) {
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ALOGE("Hook library not found: %s", HOOK_LIB_PATH);
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return;
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}
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void *handle = dlopen(HOOK_LIB_PATH, RTLD_NOW | RTLD_LOCAL);
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if (!handle) {
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ALOGE("dlopen(%s) failed: %s", HOOK_LIB_PATH, dlerror());
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return;
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}
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ALOGI("Hook library loaded: %s (handle=%p)", HOOK_LIB_PATH, handle);
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}
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};
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REGISTER_ZYGISK_MODULE(CamSwapperModule)
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