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ListServices.c
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ListServices.c
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#include <assert.h>
#include <stdio.h>
#include <windows.h>
#include <psapi.h>
#include <locale.h>
#include <tlhelp32.h>
#include <shlwapi.h>
#include <strsafe.h>
int EnumerateAllServices(SC_HANDLE hSCM, CHAR **toFill, DWORD maxItems)
{
void* buf = NULL;
DWORD bufSize = 0;
DWORD moreBytesNeeded, serviceCount;
int numberOfResults = 0;
CHAR textBuff[1024];
for (;;)
{
if (EnumServicesStatusEx(
hSCM,
SC_ENUM_PROCESS_INFO,
SERVICE_WIN32,
SERVICE_STATE_ALL,
(LPBYTE)buf,
bufSize,
&moreBytesNeeded,
&serviceCount,
NULL,
NULL))
{
assert(buf);
ENUM_SERVICE_STATUS_PROCESS* services = (ENUM_SERVICE_STATUS_PROCESS*)buf;
for(DWORD i = 0; i < serviceCount && i < maxItems; i++)
{
CHAR serviceStateBuff[1024];
switch(services[i].ServiceStatusProcess.dwCurrentState)
{
case SERVICE_CONTINUE_PENDING:
StringCchCopyA(
serviceStateBuff,
1024,
"SERVICE_CONTINUE_PENDING");
break;
case SERVICE_PAUSE_PENDING:
StringCchCopyA(
serviceStateBuff,
1024,
"SERVICE_PAUSE_PENDING");
break;
case SERVICE_RUNNING:
StringCchCopyA(
serviceStateBuff,
1024,
"SERVICE_RUNNING");
break;
case SERVICE_START_PENDING:
StringCchCopyA(
serviceStateBuff,
1024,
"SERVICE_START_PENDING");
break;
case SERVICE_STOP_PENDING:
StringCchCopyA(
serviceStateBuff,
1024,
"SERVICE_STOP_PENDING");
break;
case SERVICE_STOPPED:
StringCchCopyA(
serviceStateBuff,
1024,
"SERVICE_STOPPED");
break;
}
CHAR serviceTypeBuff[1024];
switch(services[i].ServiceStatusProcess.dwServiceType)
{
case SERVICE_FILE_SYSTEM_DRIVER:
StringCchCopyA(
serviceTypeBuff,
1024,
"SERVICE_FILE_SYSTEM_DRIVER");
break;
case SERVICE_KERNEL_DRIVER:
StringCchCopyA(
serviceTypeBuff,
1024,
"SERVICE_KERNEL_DRIVER");
break;
case SERVICE_WIN32_OWN_PROCESS:
StringCchCopyA(
serviceTypeBuff,
1024,
"SERVICE_WIN32_OWN_PROCESS");
break;
case SERVICE_WIN32_SHARE_PROCESS:
StringCchCopyA(
serviceTypeBuff,
1024,
"SERVICE_WIN32_SHARE_PROCESS");
break;
}
CHAR pidBuff[32];
if(services[i].ServiceStatusProcess.dwProcessId != 0)
{
sprintf_s(
pidBuff,
32,
"%ul",
services[i].ServiceStatusProcess.dwProcessId);
}
else
{
StringCchCopyA(
pidBuff,
32,
"");
}
sprintf_s(
textBuff,
1024,
"%-45.45ls %-50.50ls %-8s %-35s %-35s",
services[i].lpServiceName,
services[i].lpDisplayName,
pidBuff,
serviceTypeBuff,
serviceStateBuff);
toFill[numberOfResults] = StrDupA(textBuff);
numberOfResults++;
}
free(buf);
return numberOfResults;
}
int err = GetLastError();
if (ERROR_MORE_DATA != err)
{
free(buf);
return err;
}
bufSize += moreBytesNeeded;
free(buf);
buf = malloc(bufSize);
}
}
int list_services_run_no_sort(int maxItems, CHAR** linesToFill, void *state)
{
UNREFERENCED_PARAMETER(state);
SC_HANDLE scHandle = OpenSCManagerA(
NULL,
NULL,
SC_MANAGER_ALL_ACCESS);
CHAR headerBuff[1024];
sprintf_s(
headerBuff,
1024,
"%-45.45s %-50.50s %-8s %-35s %-35s",
"Name",
"Display",
"PID",
"Type",
"State");
linesToFill[0] = StrDupA(headerBuff);
int numberOfServices = EnumerateAllServices(scHandle, &linesToFill[1], (DWORD)(maxItems - 1));
CloseServiceHandle(scHandle);
return numberOfServices + 1;
}
void start_service(CHAR *szSvcName)
{
SERVICE_STATUS_PROCESS ssStatus;
DWORD dwBytesNeeded;
SC_HANDLE schSCManager = OpenSCManager(
NULL,
NULL,
SC_MANAGER_ALL_ACCESS);
if (NULL == schSCManager)
{
printf("OpenSCManager failed (%ul)\n", GetLastError());
return;
}
SC_HANDLE schService = OpenServiceA(
schSCManager,
szSvcName,
SERVICE_ALL_ACCESS);
if (schService == NULL)
{
printf("OpenService failed (%ul)\n", GetLastError());
CloseServiceHandle(schSCManager);
return;
}
if (!QueryServiceStatusEx(
schService,
SC_STATUS_PROCESS_INFO,
(LPBYTE) &ssStatus,
sizeof(SERVICE_STATUS_PROCESS),
&dwBytesNeeded))
{
printf("QueryServiceStatusEx failed (%ul)\n", GetLastError());
CloseServiceHandle(schService);
CloseServiceHandle(schSCManager);
return;
}
if(ssStatus.dwCurrentState != SERVICE_STOPPED && ssStatus.dwCurrentState != SERVICE_STOP_PENDING)
{
printf("Cannot start the service because it is already running\n");
CloseServiceHandle(schService);
CloseServiceHandle(schSCManager);
return;
}
if (!StartService(
schService,
0,
NULL))
{
printf("StartService failed (%ul)\n", GetLastError());
CloseServiceHandle(schService);
CloseServiceHandle(schSCManager);
return;
}
CloseServiceHandle(schService);
CloseServiceHandle(schSCManager);
}