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Changes to companion fork

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snake-4
2024-05-07 05:42:57 +02:00
parent 6530a5a011
commit 9c06b69c42
3 changed files with 25 additions and 33 deletions
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29
module/jni/main.cpp
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@@ -155,23 +155,20 @@ private:
void zygisk_companion_handler(int fd)
{
bool result = [&]() -> bool
{
pid_t pid;
ASSERT_DO(zygisk_companion_handler, read(fd, &pid, sizeof(pid)) == sizeof(pid), return false);
ASSERT_DO(zygisk_companion_handler, unshare(CLONE_NEWNS) != -1, return false);
ASSERT_DO(zygisk_companion_handler, Utils::switchMountNS(pid), return false);
LOGD("zygisk_companion_handler processing namespace of pid=%d", pid);
pid_t pid;
ASSERT_DO(zygisk_companion_handler, read(fd, &pid, sizeof(pid)) == sizeof(pid), return);
LOGD("zygisk_companion_handler processing namespace of pid=%d", pid);
// setns mount namespace is not effective until a fork(?)
return WIFEXITED(Utils::executeLambdaInFork(
[]()
{
doUnmount();
doRemount();
doMrProp();
}));
}();
// setns requires the caller to be single-threaded
bool result = WIFEXITED(Utils::forkAndInvoke(
[pid]()
{
ASSERT_DO(zygisk_companion_handler, Utils::switchMountNS(pid), return 1);
doUnmount();
doRemount();
doMrProp();
return 0;
}));
ASSERT_LOG(zygisk_companion_handler, write(fd, &result, sizeof(result)) == sizeof(result));
}