Implement ProcessUtils::waitForProcess() using code from Qt updater

Also fix a typo in UpdateInstaller::run()

src/ProcessUtils.cpp

@@ -1,6 +1,16 @@
 #include "ProcessUtils.h"
 
 #include "Platform.h"
+#include "StringUtils.h"
+#include "Log.h"
+
+#ifdef PLATFORM_WINDOWS
+#include <windows.h>
+#else
+#include <stdlib.h>
+#include <sys/wait.h>
+#include <errno.h>
+#endif
 
 void ProcessUtils::runAsync(const std::string& executable,
 		      const std::list<std::string>& args)
@@ -27,8 +37,30 @@ void ProcessUtils::runElevated(const std::string& executable,
 bool ProcessUtils::waitForProcess(long long pid)
 {
 #ifdef PLATFORM_UNIX
-	// TODO
+	pid_t result = ::waitpid(static_cast<pid_t>(pid), 0, 0);	
+	if (result < 0)
+	{
+		LOG(Error,"waitpid() failed with error" + intToStr(errno));
+	}
+	return result > 0;
 #elif defined(PLATFORM_WINDOWS)
+	HANDLE hProc;
+
+	if (!(hProc = OpenProcess(SYNCHRONIZE, FALSE, static_cast<DWORD>(pid))))
+	{
+		LOG(Error,"Unable to get process handle for pid" + intToStr(pid) + "last error" + intToStr(GetLastError()));
+		return false;
+	}
+
+	DWORD dwRet = WaitForSingleObject(hProc, INFINITE);
+	CloseHandle(hProc);
+
+	if (dwRet == WAIT_FAILED)
+	{
+		debug_logger(m_debugLog) << "WaitForSingleObject failed with error" << GetLastError();
+	}
+
+	return (dwRet == WAIT_OBJECT_0);
 #endif
 }
 

src/UpdateInstaller.cpp

@@ -37,13 +37,13 @@ void UpdateInstaller::run()
 {
 	LOG(Info,"Starting update installation");
 
-	if (mode == Setup)
+	if (m_mode == Setup)
 	{
 	}
-	else if (mode == Main)
+	else if (m_mode == Main)
 	{
 	}
-	else if (mode == Cleanup)
+	else if (m_mode == Cleanup)
 	{
 	}
 }