How to handle signal (CTRL + C) in Windows CE

Technical Support
1

Hi,

I want to handle signal (ctrl+c) in wince 7.But unfortunately signal.h header file is missing in the Wince SDK path.Can you please suggest something??

Regards,
Shantanu K. Pradhan

2

Did you already checked this website: winapi - How can I handle Ctrl+C in a Windows CE console application? - Stack Overflow?

3

Hi Samuel,
i have already checked the link you provided but they have given the solution by assuming that we have console.h header file.But i checked in Wince SDK installation folder but it does not have the console.h header file.

Regards,
Shantanu K. Pradhan

4

One way would be to use IOCTL_CONSOLE_SETCONTROLCEVENT. As the console.h file is missing from the SDK, you could manually add the missing defines:

#include <winioctl.h>

#define IOCTL_CONSOLE_SETCONTROLCEVENT    CTL_CODE(FILE_DEVICE_CONSOLE, 10, METHOD_BUFFERED, FILE_ANY_ACCESS)

After that you should be able to call the DeviceIoCTL as described on MSDN. This only applies on consoles. Not sure if this does actually what you want.

5

Hi Samuel,
Thanks for your response.This is what i tested/implemented as you told and its working for me…

////#include "stdafx.h"
//

#include  
#include 
#include 
#include  

#define IOCTL_CONSOLE_SETCONTROLCEVENT    CTL_CODE(FILE_DEVICE_CONSOLE, 10, METHOD_BUFFERED, FILE_ANY_ACCESS)
HANDLE ghWriteEvent; 
HANDLE ghThreads;
void CreateEventsAndThreads(void) ;
DWORD WINAPI ThreadProc(LPVOID lpParam) ;
int FLAG=1;
int main( void )
{
//    DWORD dwWaitResult;
	
	BOOL bSuccess;
	DWORD dwRead = 0;
	DWORD dwActualOut=0;
	CreateEventsAndThreads();
	bSuccess = DeviceIoControl(_fileno(stdout), IOCTL_CONSOLE_SETCONTROLCEVENT, &ghWriteEvent, sizeof(HANDLE), &dwRead, sizeof(DWORD), & dwActualOut, NULL);
	if(bSuccess==0)
	{
		printf("Device controll failed!!!!\n");
	}
	while(FLAG)
	{
		Sleep(1000);
		printf("Hello i'm in while loop\n");
	}
	
}
void CreateEventsAndThreads(void) 
{
//int i; 
DWORD dwThreadID; 
//ghWriteEvent = CreateEvent( 
//        NULL,               // default security attributes
//        TRUE,               // manual-reset event
//        FALSE,              // initial state is nonsignaled
//        TEXT("WriteEvent")  // object name
//        ); 
      ghWriteEvent=CreateEvent( NULL, TRUE, FALSE, NULL );
if (ghWriteEvent == NULL) 
    { 
        printf("CreateEvent failed (%d)\n", GetLastError());
        return;
    }

 ghThreads = CreateThread(
            NULL,              // default security
            0,                 // default stack size
            ThreadProc,        // name of the thread function
            NULL,              // no thread parameters
            0,                 // default startup flags
            &dwThreadID); 

        if (ghThreads == NULL) 
        {
            printf("CreateThread failed (%d)\n", GetLastError());
            return;
        }

}

DWORD WINAPI ThreadProc(LPVOID lpParam) 
{
   DWORD dwWaitResult;
    printf("Thread %d waiting for write event...\n", GetCurrentThreadId());
	dwWaitResult = WaitForSingleObject( 
        ghWriteEvent, // event handle
        INFINITE);    // indefinite wait
	FLAG = 0;
	printf("Exit\n");
}

Thanks again…
Shantanu K. Pradhan