Power on button test for shutting down using c - c

Question

I am using the below app when ever I press cpu`` power on button my application as to pause for few min like 5 min for that I used below app.the problem is I used sleep(300000) for stoping few min but the operation is not performing whenever I press power button please let me know if any on
#include <windows.h>
#include <stdio.h>
#include <pthread.h>
#include <signal.h>
#include <sys/types.h>
#include <unistd.h>
#define SHUTDOWN_TEST
FILE *fp;
BOOL CtrlHandler( DWORD fdwCtrlType )
{
time_t rawtime;
struct tm * timeinfo;
time (&rawtime);
timeinfo = localtime (&rawtime);
switch( fdwCtrlType )
{
// Handle the CTRL-C signal.
case CTRL_C_EVENT:
printf( "Ctrl-C event\n\n" );
Beep( 750, 300 );
return( TRUE );
// CTRL-CLOSE: confirm that the user wants to exit.
case CTRL_CLOSE_EVENT:
Beep( 600, 200 );
printf( "Ctrl-Close event\n\n" );
return( TRUE );
// Pass other signals to the next handler.
case CTRL_BREAK_EVENT:
Beep( 900, 200 );
printf( "Ctrl-Break event\n\n" );
return FALSE;
case CTRL_LOGOFF_EVENT:
Beep( 1000, 200 );
printf( "Ctrl-Logoff event\n\n" );
return FALSE;
case CTRL_SHUTDOWN_EVENT:
printf( "Ctrl-Shutdown event\n\n" );
while(1)
{
Sleep(300000);
}
Beep( 750, 500 );
return FALSE;
default:
return FALSE;
}
}
int main( void )
{
fp = (fopen("C:\\shutdown.txt","w"));
#ifdef SHUTDOWN_TEST
if( SetConsoleCtrlHandler((PHANDLER_ROUTINE) CtrlHandler, TRUE ) )
{
printf( "\nThe Control Handler is installed.\n" );
printf( "\n -- Now try pressing Ctrl+C or Ctrl+Break, or" );
printf( "\n try logging off or closing the console...\n" );
printf( "\n(...waiting in a loop for events...)\n\n" );
while( 1 ){
printf("I am running\n");
Sleep(3000) ;
}
}
else
{
printf( "\nERROR: Could not set control handler");
return 1;
}
fclose(fp);
#else
if (pid = fork())
{
if( SetConsoleCtrlHandler((PHANDLER_ROUTINE) CtrlHandler, TRUE ) )
{
printf( "\nThe Control Handler is installed.\n" );
printf( "\n -- Now try pressing Ctrl+C or Ctrl+Break, or" );
printf( "\n try logging off or closing the console...\n" );
printf( "\n(...waiting in a loop for events...)\n\n" );
while( 1 ){
// printf("I am running\n");
// Sleep(3000) ;
}
}
}
else
{
}
#endif
return 0;
}

Answer 1

Blocking the System shutdown can not be done inside such a handler. Since Windows Vista there is a new API.
Use ShutdownBlockReasonCreate
You can use GetConsoleWindow to get the requested window handle.
Read this link to see the changes since Vista.