wtsapi32: partial implementation of WTSEnumerateProcessesW (resend)

[Stefan Leichter]

Thursday 19 December 2013 André Hentschel <nerv at dawncrow.de>
> > diff --git a/dlls/wtsapi32/wtsapi32.c b/dlls/wtsapi32/wtsapi32.c
> > index 898b95d..53c6325 100644
> > --- a/dlls/wtsapi32/wtsapi32.c
> > +++ b/dlls/wtsapi32/wtsapi32.c
> > @@ -18,9 +18,13 @@
> > 
> >  #include "config.h"
> >  #include <stdarg.h>
> >  #include <stdlib.h>
> > 
> > -#include "windef.h"
> > -#include "winbase.h"
> > +#include "ntstatus.h"
> > +#define WIN32_NO_STATUS
> > +#include "winternl.h"
> > 
> >  #include "wtsapi32.h"
> > 
> > +#include "wine/library.h"
> > +#include "wine/server.h"
> > +#include "wine/unicode.h"
> > 
> >  #include "wine/debug.h"
> 
> do you need that all?

You are right, this can be done better

> 
> >  WINE_DEFAULT_DEBUG_CHANNEL(wtsapi);
> > 
> > @@ -84,14 +88,65 @@ BOOL WINAPI WTSEnumerateProcessesA(HANDLE hServer,
> > DWORD Reserved, DWORD Version
> > 
> >  BOOL WINAPI WTSEnumerateProcessesW(HANDLE hServer, DWORD Reserved, DWORD
> >  Version,
> >  
> >      PWTS_PROCESS_INFOW* ppProcessInfo, DWORD* pCount)
> >  
> >  {
> > 
> > -    FIXME("Stub %p 0x%08x 0x%08x %p %p\n", hServer, Reserved, Version,
> > -          ppProcessInfo, pCount);
> > +    SYSTEM_PROCESS_INFORMATION *spi;
> > +    ULONG size = 0x4000;
> > +    void *buf = NULL;
> > +    NTSTATUS status;
> > +    DWORD i,lcount = 0;
> > +    WTS_PROCESS_INFOW *linfo;
> 
> can't you use sizeof(*spi) or a multiple of it for size? or clean it up
> somehow else...

Of course sizeof(*spi) can be used.

> 
> >      if (!ppProcessInfo || !pCount) return FALSE;
> >      
> >      *pCount = 0;
> >      *ppProcessInfo = NULL;
> > 
> > +    if (hServer != WTS_CURRENT_SERVER_HANDLE)
> > +    {
> > +        FIXME("Only WTS_CURRENT_SERVER_HANDLE is impemented\n");
> > +        return FALSE;
> > +    }
> > +
> > +    do {
> > +        size *= 2;
> > +        HeapFree(GetProcessHeap(), 0, buf);
> > +        buf = HeapAlloc(GetProcessHeap(), 0, size);
> > +        if (!buf)
> > +            return FALSE;
> > +
> > +        status = NtQuerySystemInformation(SystemProcessInformation, buf,
> > size, NULL); +    } while(status == STATUS_INFO_LENGTH_MISMATCH);
> > +
> > +    if (status != STATUS_SUCCESS)
> > +    {
> > +        HeapFree(GetProcessHeap(), 0, buf);
> > +        SetLastError(RtlNtStatusToDosError(status));
> > +        return FALSE;
> > +    }
> > +
> > +    spi = buf;
> 
> why not dropping buf completely?

The main problem is that the value of NextEntryOffset is different from one spi 
to the next. Something like spi[i] can't be done. Therefore i need to keep the 
reference to the first SYSTEM_PROCESS_INFORMATION element.

> 
> > +    do {
> > +        lcount++;
> > +        spi = (SYSTEM_PROCESS_INFORMATION *)(((PCHAR)spi) +
> > spi->NextEntryOffset); +    } while(spi->NextEntryOffset != 0);
> 
> isn't there an easier way to get the count?

I don't see any

> 
> > +    linfo = HeapAlloc(GetProcessHeap(), 0, lcount *
> > sizeof(WTS_PROCESS_INFOW)); +    if(!linfo)
> > +        return FALSE;
> > +
> > +    for(i = 0, spi = buf; i < lcount; i++)
> > +    {
> > +        linfo[i].SessionId = 0;
> > +        linfo[i].ProcessId = HandleToUlong(spi->UniqueProcessId);
> > +        linfo[i].pProcessName = spi->ProcessName.Buffer;
> > +        linfo[i].pUserSid = NULL;
> > +        spi = (SYSTEM_PROCESS_INFORMATION *)(((PCHAR)spi) +
> > spi->NextEntryOffset); +    }
> > +    *ppProcessInfo = linfo;
> > +    *pCount = lcount;
> > +    FIXME("pUserSid not filled\n");
> > +
> > +    HeapFree(GetProcessHeap(), 0, buf);
> > 
> >      return TRUE;
> >  
> >  }
> > 
> > diff --git a/include/wtsapi32.h b/include/wtsapi32.h
> > index f4bab56..0476478 100644
> > --- a/include/wtsapi32.h
> > +++ b/include/wtsapi32.h
> > @@ -135,6 +135,8 @@ typedef struct _WTS_SERVER_INFOW
> > 
> >  DECL_WINELIB_TYPE_AW(WTS_SERVER_INFO)
> >  DECL_WINELIB_TYPE_AW(PWTS_SERVER_INFO)
> > 
> > +#define WTS_CURRENT_SERVER_HANDLE NULL
> > +
> 
> maybe some more WTS_ defines while you're at it

I though we add the content of the header files on demand. The prototyp of 
WTSEnumerateProcessesW is already in the header file. What do you have in mind?

> 
> >  void WINAPI WTSCloseServer(HANDLE);
> >  BOOL WINAPI WTSConnectSessionA(ULONG, ULONG, PSTR, BOOL);
> >  BOOL WINAPI WTSConnectSessionW(ULONG, ULONG, PWSTR, BOOL);