add spawn callback to Process

src/Process.cpp

@@ -53,6 +53,8 @@ namespace nanosm {
 		} else {
 			// Parent: monitor FD
 			eventLoop.AddObject(IoObject::Ptr(shared_from_this()));
+			if(onProcessSpawn)
+				eventLoop.Post(onProcessSpawn);
 		}
 	}
 
@@ -77,6 +79,10 @@ namespace nanosm {
 			kill(pid, SIGTERM);
 	}
 
+	void Process::SetSpawnCallback(std::function<void()> f) {
+		onProcessSpawn = f;
+	}
+
 	void Process::SetExitCallback(std::function<void(int)> f) {
 		onProcessExit = f;
 	}

src/Process.hpp

@@ -25,6 +25,9 @@ namespace nanosm {
 
 		void Kill();
 
+
+		void SetSpawnCallback(std::function<void()> f);
+
 		void SetExitCallback(std::function<void(int)> f);
 
 	   private:
@@ -35,6 +38,7 @@ namespace nanosm {
 		siginfo_t siginfo {};
 		std::string commLine;
 
+		std::function<void()> onProcessSpawn;
 		std::function<void(int)> onProcessExit;
 	};
 

src/main.cpp

@@ -4,10 +4,9 @@
 #include <memory>
 
 #include "EventLoop.hpp"
-#include "WordExp.hpp"
-
-#include "Timer.hpp"
 #include "Process.hpp"
+#include "Timer.hpp"
+#include "WordExp.hpp"
 
 nanosm::EventLoop ev;
 
@@ -17,7 +16,7 @@ auto timer = std::make_shared<nanosm::Timer>(ev);
 auto process = std::make_shared<nanosm::Process>(ev);
 
 void test() {
-
+	process->SetSpawnCallback([p = process]() {
 		// Do magic
 		process->SetExitCallback([p = process](int exitCode) {
 			printf("exited with %d exitcode\n", exitCode);
@@ -30,6 +29,7 @@ void test() {
 			// Start the timer to wait a bit before restarting the process
 			timer->Arm(1);
 		});
+	});
 
 	ev.AddObject(timer);
 	process->Spawn("xterm");