MTP: Use fork instead of pthread

Change-Id: I95cf6f4def0c86f40c775738f0712323f0a0f146
diff --git a/mtp/twrpMtp.cpp b/mtp/twrpMtp.cpp
index 6fe0ee3..e7c3f2c 100755
--- a/mtp/twrpMtp.cpp
+++ b/mtp/twrpMtp.cpp
@@ -82,7 +82,7 @@
 	return 0;
 }
 
-pthread_t twrpMtp::runserver(void) {
+pthread_t twrpMtp::threadserver(void) {
 	pthread_t thread;
 	ThreadPtr mtpptr = &twrpMtp::start;
 	PThreadPtr p = *(PThreadPtr*)&mtpptr;
@@ -90,6 +90,21 @@
 	return thread;
 }
 
+pid_t twrpMtp::forkserver(void) {
+	pid_t pid;
+	if ((pid = fork()) == -1) {
+		MTPE("MTP fork failed.\n");
+		return 0;
+	}
+	if (pid == 0) {
+		// Child process
+		start();
+	} else {
+		return pid;
+	}
+	return 0;
+}
+
 void twrpMtp::addStorage(std::string display, std::string path, int mtpid) {
 	s = new storage;
 	s->display = display;
diff --git a/mtp/twrpMtp.hpp b/mtp/twrpMtp.hpp
index bed81c0..f0d8f4b 100755
--- a/mtp/twrpMtp.hpp
+++ b/mtp/twrpMtp.hpp
@@ -34,7 +34,8 @@
 class twrpMtp {
 	public:
 		twrpMtp(int debug_enabled /* = 0 */);
-		pthread_t runserver(void);
+		pthread_t threadserver(void);
+		pid_t forkserver(void);
 		void addStorage(std::string display, std::string path, int mtpid);
 	private:
 		int start(void);