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c1070182a2
+ Added a mounts parser implementation using mntent API. + Added logging functions. + Added usermode unmounter which calls unshare pre app-specialization. * Updated module.prop.
56 lines
1.4 KiB
C++
56 lines
1.4 KiB
C++
#include <unistd.h>
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#include <sched.h>
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#include "zygisk.hpp"
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#include "logging.hpp"
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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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void do_unmount();
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class ZygiskModule : public zygisk::ModuleBase
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{
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public:
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void onLoad(Api *api, JNIEnv *env) override
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{
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this->api = api;
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this->env = env;
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}
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void preAppSpecialize(AppSpecializeArgs *args) override
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{
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api->setOption(zygisk::Option::DLCLOSE_MODULE_LIBRARY);
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uint32_t flags = api->getFlags();
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bool isRoot = (flags & zygisk::StateFlag::PROCESS_GRANTED_ROOT) != 0;
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bool isOnDenylist = (flags & zygisk::StateFlag::PROCESS_ON_DENYLIST) != 0;
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if (!isRoot && isOnDenylist && args->uid > 1000)
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{
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LOGD("Unmounting in preAppSpecialize for pid=%d uid=%d", getpid(), args->uid);
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/*
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* preAppSpecialize is before ensureInAppMountNamespace.
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* postAppSpecialize is after seccomp setup.
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* So we unshare here to create a pseudo app mount namespace
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*/
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if (unshare(CLONE_NEWNS) == 0)
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{
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LOGD("unshare(CLONE_NEWNS) returned 0");
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do_unmount();
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}
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else
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{
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LOGE("unshare(CLONE_NEWNS) returned -1: %d (%s)", errno, strerror(errno));
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}
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}
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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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};
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REGISTER_ZYGISK_MODULE(ZygiskModule)
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