Programming Forums > Application Development > C++

badbasser98 · Mar 27th, 2006, 3:34 PM

Hi all,

Would someone be kind enough to put together a working example of a program using the TerminateProcess() function? I have tried for the life of me to follow the examples found on MSDN to create a program that includes this, but cannot. Perferably a function that searches the current running processes and closes one (predetermined by programer), there could also be mutiple instances of this process with the same name.

This is modified code taken from the MSDN example I was using to try and get this to work (yes i know it could be improved and more 'modern' code could have been used, but I am simply trying to get it to work, not make it pretty just yet). As of right now, it also creates a list in a text file showing the currently running processes and their ID number and opens it upon finishing the search. During the process query it is supposed to terminate any process with the name dtelnet.exe or adwin.exe.

(Toggle Plain Text)

 #include <windows.h>
#include <stdio.h>
#include <tchar.h>
#include "psapi.h"
 
const char* filename;
FILE* fio;
char ret;
 
void PrintProcessNameAndID( DWORD processID )
{
TCHAR szProcessName[MAX_PATH] = TEXT("<unknown>");
TCHAR szName[MAX_PATH] = TEXT("dtelnet.exe");
 
// Get a handle to the process.
HANDLE hProcess = OpenProcess( PROCESS_QUERY_INFORMATION |
		 PROCESS_VM_READ,
		 FALSE, processID );
 
// Get the process name.
if (NULL != hProcess )
{
HMODULE hMod;
DWORD cbNeeded;
 
if ( EnumProcessModules( hProcess, &hMod, sizeof(hMod), 
	&cbNeeded) )
{
GetModuleBaseName( hProcess, hMod, szProcessName, 
		sizeof(szProcessName)/sizeof(TCHAR) );
}
}
 
	// Print the process name and identifier in the text file.
 
if ((fio = fopen(filename, "a+")) != NULL)
		 {
			 fprintf( fio, "%s\t(%u)\n", szProcessName, processID);
		 }
	fclose(fio);
	if (szProcessName == "dtelnet.exe" | szProcessName == "adwin.exe")
	{
		 TerminateProcess(hProcess, 1);
	}
CloseHandle( hProcess );
}
 
 
int main( )
{
int NoOfProcesses;
	// Get the list of process identifiers.
 
DWORD aProcesses[1024], cbNeeded, cProcesses;
unsigned int i;
 
if ( !EnumProcesses( aProcesses, sizeof(aProcesses), &cbNeeded ) )
return 0;
 
// Calculate how many process identifiers were returned.
 
cProcesses = cbNeeded / sizeof(DWORD);
NoOfProcesses = cProcesses;
 
	//clear all previous data to show only current processes and prevent errors.
	filename = "C:\\processes.txt";
	fio = fopen(filename, "w");
fclose(fio);
 
	if ((fio = fopen(filename, "a+")) != NULL)
	{
	 fprintf( fio, "Process Name\t(PID)\n\n");
	}
	fclose(fio);
 
	// Print the name and process identifier for each process in the text file.
for ( i = 0; i < cProcesses; i++ )
PrintProcessNameAndID( aProcesses[i] );
 
if ((fio = fopen(filename, "a+")) != NULL)
	{
	 fprintf( fio, "\nTotal Processes Scanned: %i", NoOfProcesses);
	}
	fclose(fio);
printf("do not close this window, it will close automatically");
printf(" when notepad is closed.");
system("c:\\processes.txt");
	return 0;
}

 #include <windows.h>
#include <stdio.h>
#include <tchar.h>
#include "psapi.h"
 
const char* filename;
FILE* fio;
char ret;
 
void PrintProcessNameAndID( DWORD processID )
{
TCHAR szProcessName[MAX_PATH] = TEXT("<unknown>");
TCHAR szName[MAX_PATH] = TEXT("dtelnet.exe");
 
// Get a handle to the process.
HANDLE hProcess = OpenProcess( PROCESS_QUERY_INFORMATION |
		 PROCESS_VM_READ,
		 FALSE, processID );
 
// Get the process name.
if (NULL != hProcess )
{
HMODULE hMod;
DWORD cbNeeded;
 
if ( EnumProcessModules( hProcess, &hMod, sizeof(hMod), 
	&cbNeeded) )
{
GetModuleBaseName( hProcess, hMod, szProcessName, 
		sizeof(szProcessName)/sizeof(TCHAR) );
}
}
 
	// Print the process name and identifier in the text file.
 
if ((fio = fopen(filename, "a+")) != NULL)
		 {
			 fprintf( fio, "%s\t(%u)\n", szProcessName, processID);
		 }
	fclose(fio);
	if (szProcessName == "dtelnet.exe" | szProcessName == "adwin.exe")
	{
		 TerminateProcess(hProcess, 1);
	}
CloseHandle( hProcess );
}
 
 
int main( )
{
int NoOfProcesses;
	// Get the list of process identifiers.
 
DWORD aProcesses[1024], cbNeeded, cProcesses;
unsigned int i;
 
if ( !EnumProcesses( aProcesses, sizeof(aProcesses), &cbNeeded ) )
return 0;
 
// Calculate how many process identifiers were returned.
 
cProcesses = cbNeeded / sizeof(DWORD);
NoOfProcesses = cProcesses;
 
	//clear all previous data to show only current processes and prevent errors.
	filename = "C:\\processes.txt";
	fio = fopen(filename, "w");
fclose(fio);
 
	if ((fio = fopen(filename, "a+")) != NULL)
	{
	 fprintf( fio, "Process Name\t(PID)\n\n");
	}
	fclose(fio);
 
	// Print the name and process identifier for each process in the text file.
for ( i = 0; i < cProcesses; i++ )
PrintProcessNameAndID( aProcesses[i] );
 
if ((fio = fopen(filename, "a+")) != NULL)
	{
	 fprintf( fio, "\nTotal Processes Scanned: %i", NoOfProcesses);
	}
	fclose(fio);
printf("do not close this window, it will close automatically");
printf(" when notepad is closed.");
system("c:\\processes.txt");
	return 0;
}

Thanks for the help,
-BB98

bgeraghty · Mar 27th, 2006, 3:41 PM

Isn't the part that it writes to a txt file unnecessary? You could just strcmp() the array of process names you get one by one inside the app and then call terminateprocess() to end it. Once you have the name/PID, grab the handle with OpenProcess() and pass it to TerminateProcess()

The Dark · Mar 27th, 2006, 5:50 PM

(Toggle Plain Text)

	if (szProcessName == "dtelnet.exe" | szProcessName == "adwin.exe")

You can't compare c strings like this. You need to use strcmp. Also you should use the logical or (||), rather than the bitwise or (|)

(Toggle Plain Text)

	if (strcmp(szProcessName, "dtelnet.exe") == 0 || strcmp(szProcessName,  "adwin.exe") == 0)

Cache · Mar 27th, 2006, 7:14 PM

A little searching never hurt anyone lol: http://www.programmingforums.org/for...ead.php?t=8525

nnxion · Mar 28th, 2006, 1:29 AM

Quote:

Originally Posted by Cache

A little searching never hurt anyone lol: http://www.programmingforums.org/for...ead.php?t=8525

Yeah I saw him looking at that yesterday, he must not have copied it rightly.

badbasser98 · Mar 29th, 2006, 7:54 AM

Quote:

Originally Posted by Cache

A little searching never hurt anyone lol: http://www.programmingforums.org/for...ead.php?t=8525

I know of that thread, since it is one that I started

... I was asking for a more specific example on how to get it to work, or how mine could be corrected.

Quote:

Originally Posted by bgeraghty

Isn't the part that it writes to a txt file unnecessary?

Yes, the only reason it is in there is becuase this is a test program that I was trying to do serveral things with and get them working before including them in the main code of a program I am creating.

Quote:

Originally Posted by The Dark

You can't compare c strings like this. You need to use strcmp. Also you should use the logical or (||), rather than the bitwise or (|)

(Toggle Plain Text)

	if (strcmp(szProcessName, "dtelnet.exe") == 0 || strcmp(szProcessName, "adwin.exe") == 0)

That makes sence, however is still does not work. Thanks for trying.

nnxion · Mar 29th, 2006, 8:44 AM

You did not even read this. Which was already in the application Cache showed you. It works after you apply that.

I also highly recommend using the C++ library, and lastly opening and closing a file 3 times is not very effecient.

badbasser98 · Mar 29th, 2006, 9:03 AM

First off, how can you tell me that I did not read anything. Are you here sitting next to me watching what I am or am not doing? As a matter of fact, I did read that. I may have not understood everything fully, but read it non the less. After trying serveral things to make it work, I could not so I figured I would ask here since the people here have been helpful in the past. Now I am not so sure how helpful this forum really is...

I also could care less about he efficiency of this program as it is just to test functionality of a few things. This is nothing that will be "copied and pasted" into any other code. Strictly a test program, as I have stated before, to get a grasp on this and the write to file method. And actually, it is opening and closing the file more along the lines of 45 times (once for each process). It still takes well under a second to run, but that is irrelevent.

Cache · Mar 29th, 2006, 11:34 AM

Go back to the example I showed you in your other post. Note the access right I open the process with. It's the bit in bold lol. Then, again, see the following link:

http://msdn.microsoft.com/library/de...ateprocess.asp

It states quite clearly that:

Quote:

hProcess [in] Handle to the process to terminate.
The handle must have the PROCESS_TERMINATE access right. For more information, see Process Security and Access Rights.

badbasser98 · Mar 29th, 2006, 3:12 PM

Quote:

Originally Posted by Cache

It states quite clearly that:

Quote:

hProcess [in] Handle to the process to terminate.
The handle must have the PROCESS_TERMINATE access right. For more information, see Process Security and Access Rights.

Ah, I completely missed that part in the code... Its a bit hard to distinguish the bold from the rest in some instances with the italics. Thanks for the help Cache.

Quote:

Originally Posted by DaWei

Don't admit you read it, we'll think you can't comprehend

.

Well, at times its hard to understand everything you read when also trying to juggle 3 other tasks at the same time... Guess I should have read it at home instead of at work.

Mar 27th, 2006, 3:34 PM	#1
badbasser98 Hobbyist Programmer Join Date: Mar 2005 Location: United States Posts: 124 Rep Power: 4	working example Hi all, Would someone be kind enough to put together a working example of a program using the TerminateProcess() function? I have tried for the life of me to follow the examples found on MSDN to create a program that includes this, but cannot. Perferably a function that searches the current running processes and closes one (predetermined by programer), there could also be mutiple instances of this process with the same name. This is modified code taken from the MSDN example I was using to try and get this to work (yes i know it could be improved and more 'modern' code could have been used, but I am simply trying to get it to work, not make it pretty just yet). As of right now, it also creates a list in a text file showing the currently running processes and their ID number and opens it upon finishing the search. During the process query it is supposed to terminate any process with the name dtelnet.exe or adwin.exe. (Toggle Plain Text) #include <windows.h> #include <stdio.h> #include <tchar.h> #include "psapi.h" const char* filename; FILE* fio; char ret; void PrintProcessNameAndID( DWORD processID ) { TCHAR szProcessName[MAX_PATH] = TEXT("<unknown>"); TCHAR szName[MAX_PATH] = TEXT("dtelnet.exe"); // Get a handle to the process. HANDLE hProcess = OpenProcess( PROCESS_QUERY_INFORMATION \| PROCESS_VM_READ, FALSE, processID ); // Get the process name. if (NULL != hProcess ) { HMODULE hMod; DWORD cbNeeded; if ( EnumProcessModules( hProcess, &hMod, sizeof(hMod), &cbNeeded) ) { GetModuleBaseName( hProcess, hMod, szProcessName, sizeof(szProcessName)/sizeof(TCHAR) ); } } // Print the process name and identifier in the text file. if ((fio = fopen(filename, "a+")) != NULL) { fprintf( fio, "%s\t(%u)\n", szProcessName, processID); } fclose(fio); if (szProcessName == "dtelnet.exe" \| szProcessName == "adwin.exe") { TerminateProcess(hProcess, 1); } CloseHandle( hProcess ); } int main( ) { int NoOfProcesses; // Get the list of process identifiers. DWORD aProcesses[1024], cbNeeded, cProcesses; unsigned int i; if ( !EnumProcesses( aProcesses, sizeof(aProcesses), &cbNeeded ) ) return 0; // Calculate how many process identifiers were returned. cProcesses = cbNeeded / sizeof(DWORD); NoOfProcesses = cProcesses; //clear all previous data to show only current processes and prevent errors. filename = "C:\\processes.txt"; fio = fopen(filename, "w"); fclose(fio); if ((fio = fopen(filename, "a+")) != NULL) { fprintf( fio, "Process Name\t(PID)\n\n"); } fclose(fio); // Print the name and process identifier for each process in the text file. for ( i = 0; i < cProcesses; i++ ) PrintProcessNameAndID( aProcesses[i] ); if ((fio = fopen(filename, "a+")) != NULL) { fprintf( fio, "\nTotal Processes Scanned: %i", NoOfProcesses); } fclose(fio); printf("do not close this window, it will close automatically"); printf(" when notepad is closed."); system("c:\\processes.txt"); return 0; } #include <windows.h> #include <stdio.h> #include <tchar.h> #include "psapi.h" const char* filename; FILE* fio; char ret; void PrintProcessNameAndID( DWORD processID ) { TCHAR szProcessName[MAX_PATH] = TEXT("<unknown>"); TCHAR szName[MAX_PATH] = TEXT("dtelnet.exe"); // Get a handle to the process. HANDLE hProcess = OpenProcess( PROCESS_QUERY_INFORMATION \| PROCESS_VM_READ, FALSE, processID ); // Get the process name. if (NULL != hProcess ) { HMODULE hMod; DWORD cbNeeded; if ( EnumProcessModules( hProcess, &hMod, sizeof(hMod), &cbNeeded) ) { GetModuleBaseName( hProcess, hMod, szProcessName, sizeof(szProcessName)/sizeof(TCHAR) ); } } // Print the process name and identifier in the text file. if ((fio = fopen(filename, "a+")) != NULL) { fprintf( fio, "%s\t(%u)\n", szProcessName, processID); } fclose(fio); if (szProcessName == "dtelnet.exe" \| szProcessName == "adwin.exe") { TerminateProcess(hProcess, 1); } CloseHandle( hProcess ); } int main( ) { int NoOfProcesses; // Get the list of process identifiers. DWORD aProcesses[1024], cbNeeded, cProcesses; unsigned int i; if ( !EnumProcesses( aProcesses, sizeof(aProcesses), &cbNeeded ) ) return 0; // Calculate how many process identifiers were returned. cProcesses = cbNeeded / sizeof(DWORD); NoOfProcesses = cProcesses; //clear all previous data to show only current processes and prevent errors. filename = "C:\\processes.txt"; fio = fopen(filename, "w"); fclose(fio); if ((fio = fopen(filename, "a+")) != NULL) { fprintf( fio, "Process Name\t(PID)\n\n"); } fclose(fio); // Print the name and process identifier for each process in the text file. for ( i = 0; i < cProcesses; i++ ) PrintProcessNameAndID( aProcesses[i] ); if ((fio = fopen(filename, "a+")) != NULL) { fprintf( fio, "\nTotal Processes Scanned: %i", NoOfProcesses); } fclose(fio); printf("do not close this window, it will close automatically"); printf(" when notepad is closed."); system("c:\\processes.txt"); return 0; } Thanks for the help, -BB98 __________________ Learning to use C++ and loving every minute of it.

Mar 27th, 2006, 5:50 PM	#3
The Dark Expert Programmer Join Date: Jun 2005 Posts: 825 Rep Power: 4	(Toggle Plain Text) if (szProcessName == "dtelnet.exe" \| szProcessName == "adwin.exe") if (szProcessName == "dtelnet.exe" \| szProcessName == "adwin.exe") You can't compare c strings like this. You need to use strcmp. Also you should use the logical or (\|\|), rather than the bitwise or (\|) (Toggle Plain Text) if (strcmp(szProcessName, "dtelnet.exe") == 0 \|\| strcmp(szProcessName, "adwin.exe") == 0) if (strcmp(szProcessName, "dtelnet.exe") == 0 \|\| strcmp(szProcessName, "adwin.exe") == 0)

Mar 29th, 2006, 8:44 AM	#7
nnxion Programming Guru Join Date: Jun 2005 Location: elemental plane Posts: 1,429 Rep Power: 5	You did not even read this. Which was already in the application Cache showed you. It works after you apply that. I also highly recommend using the C++ library, and lastly opening and closing a file 3 times is not very effecient. __________________ "Employ your time in improving yourself by other men's writings, so that you shall gain easily what others have labored hard for." -- Socrates

Mar 29th, 2006, 9:03 AM	#8
badbasser98 Hobbyist Programmer Join Date: Mar 2005 Location: United States Posts: 124 Rep Power: 4	First off, how can you tell me that I did not read anything. Are you here sitting next to me watching what I am or am not doing? As a matter of fact, I did read that. I may have not understood everything fully, but read it non the less. After trying serveral things to make it work, I could not so I figured I would ask here since the people here have been helpful in the past. Now I am not so sure how helpful this forum really is... I also could care less about he efficiency of this program as it is just to test functionality of a few things. This is nothing that will be "copied and pasted" into any other code. Strictly a test program, as I have stated before, to get a grasp on this and the write to file method. And actually, it is opening and closing the file more along the lines of 45 times (once for each process). It still takes well under a second to run, but that is irrelevent. __________________ Learning to use C++ and loving every minute of it.

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Mar 27th, 2006, 3:41 PM	#2
bgeraghty Newbie Join Date: Mar 2006 Posts: 15 Rep Power: 0	Isn't the part that it writes to a txt file unnecessary? You could just strcmp() the array of process names you get one by one inside the app and then call terminateprocess() to end it. Once you have the name/PID, grab the handle with OpenProcess() and pass it to TerminateProcess()

Mar 27th, 2006, 7:14 PM	#4
Cache Hobbyist Join Date: Sep 2005 Posts: 261 Rep Power: 4	A little searching never hurt anyone lol: http://www.programmingforums.org/for...ead.php?t=8525

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