programs/whoami/main.c

   1 /*
   2  * Copyright 2020 Brendan Shanks for CodeWeavers
   3  *
   4  * This library is free software; you can redistribute it and/or
   5  * modify it under the terms of the GNU Lesser General Public
   6  * License as published by the Free Software Foundation; either
   7  * version 2.1 of the License, or (at your option) any later version.
   8  *
   9  * This library is distributed in the hope that it will be useful,
  10  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  11  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  12  * Lesser General Public License for more details.
  13  *
  14  * You should have received a copy of the GNU Lesser General Public
  15  * License along with this library; if not, write to the Free Software
  16  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
  17  */
  18
  19 #define SECURITY_WIN32
  20 #include <windows.h>
  21 #include <security.h>
  22
  23 #include "wine/debug.h"
  24
  25 WINE_DEFAULT_DEBUG_CHANNEL(whoami);
  26
  27 static int output_write(const WCHAR* str, int len)
  28 {
  29     DWORD ret, count;
  30     ret = WriteConsoleW(GetStdHandle(STD_OUTPUT_HANDLE), str, len, &count, NULL);
  31     if (!ret)
  32     {
  33         DWORD lenA;
  34         char* strA;
  35
  36         /* On Windows WriteConsoleW() fails if the output is redirected. So fall
  37          * back to WriteFile(), assuming the console encoding is still the right
  38          * one in that case.
  39          */
  40         lenA = WideCharToMultiByte(GetConsoleOutputCP(), 0, str, len,
  41                                    NULL, 0, NULL, NULL);
  42         strA = HeapAlloc(GetProcessHeap(), 0, lenA);
  43         if (!strA)
  44             return 0;
  45
  46         WideCharToMultiByte(GetConsoleOutputCP(), 0, str, len, strA, lenA,
  47                             NULL, NULL);
  48         WriteFile(GetStdHandle(STD_OUTPUT_HANDLE), strA, lenA, &count, FALSE);
  49         HeapFree(GetProcessHeap(), 0, strA);
  50     }
  51     return count;
  52 }
  53
  54 int __cdecl wmain(int argc, WCHAR *argv[])
  55 {
  56     WCHAR *buf = NULL;
  57     ULONG size = 0;
  58     BOOL result;
  59
  60     if (argc > 1)
  61     {
  62         int i;
  63
  64         WINE_FIXME("unsupported arguments:");
  65         for (i = 0; i < argc; i++)
  66             WINE_FIXME(" %s", wine_dbgstr_w(argv[i]));
  67         WINE_FIXME("\n");
  68     }
  69
  70     result = GetUserNameExW(NameSamCompatible, NULL, &size);
  71     if (result || GetLastError() != ERROR_MORE_DATA)
  72     {
  73         WINE_ERR("GetUserNameExW failed, result %d, error %d\n", result, GetLastError());
  74         return 1;
  75     }
  76
  77     buf = HeapAlloc(GetProcessHeap(), 0, size * sizeof(WCHAR));
  78     if (!buf)
  79     {
  80         WINE_ERR("Memory allocation failed\n");
  81         return 1;
  82     }
  83
  84     result = GetUserNameExW(NameSamCompatible, buf, &size);
  85     if (result)
  86     {
  87         output_write(buf, size);
  88         output_write(L"\r\n", 2);
  89     }
  90     else
  91         WINE_ERR("GetUserNameExW failed, error %d\n", GetLastError());
  92
  93     HeapFree(GetProcessHeap(), 0, buf);
  94     return 0;
  95 }