zen startup hardening (#49)

- Feature: `zen up` command improvements
	- --`port` allows you to specify a base port when starting an instance
	- --`base-dir` allows you to specify a base directory for the zenserver executable if it is not located next to the zen.exe executable
- Feature: `zen down`
	- --`port` allows you to specify a base port when shutting down an instance
	- --`base-dir` allows you to specify a base directory for the zenserver executable if it is not located next to the zen.exe executable
	- --`force` if regular shutdown fails it tries to find a running zenserver.exe process and terminate it
	- If it fails to attach to the running server it now waits for it to exit when setting the RequestExit shared memory flag
- Improvement: zenserver now checks the RequestExit flag in the shared memory and exist gracefully if it is set
- Improvement: When adding a sponsor process to a running zenserver instance, we wait for it to be picked up from the shared memory section to determine success/fail

1 files changed, 4 insertions, 1 deletions

diff --git a/src/zencore/include/zencore/process.h b/src/zencore/include/zencore/process.h
index a14aa5a71..6dce2d264 100644
--- a/src/zencore/include/zencore/process.h
+++ b/src/zencore/include/zencore/process.h
@@ -28,7 +28,7 @@ public:
 	ZENCORE_API [[nodiscard]] bool IsValid() const;
 	ZENCORE_API bool			   Wait(int TimeoutMs = -1);
 	ZENCORE_API int				   WaitExitCode();
-	ZENCORE_API void			   Terminate(int ExitCode);
+	ZENCORE_API bool			   Terminate(int ExitCode);
 	ZENCORE_API void			   Reset();
 	[[nodiscard]] inline int	   Pid() const { return m_Pid; }
 
@@ -91,9 +91,12 @@ private:
 };
 
 ZENCORE_API bool IsProcessRunning(int pid);
+ZENCORE_API bool IsProcessRunning(int pid, std::error_code& OutEc);
 ZENCORE_API int	 GetCurrentProcessId();
 int				 GetProcessId(CreateProcResult ProcId);
 
+std::error_code FindProcess(const std::filesystem::path& ExecutableImage, ProcessHandle& OutHandle);
+
 void process_forcelink();  // internal
 
 }  // namespace zen