programs/services/utils.c

   1 /*
   2  * Services.exe - some utility functions
   3  *
   4  * Copyright 2007 Google (Mikolaj Zalewski)
   5  *
   6  * This library is free software; you can redistribute it and/or
   7  * modify it under the terms of the GNU Lesser General Public
   8  * License as published by the Free Software Foundation; either
   9  * version 2.1 of the License, or (at your option) any later version.
  10  *
  11  * This library is distributed in the hope that it will be useful,
  12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  14  * Lesser General Public License for more details.
  15  *
  16  * You should have received a copy of the GNU Lesser General Public
  17  * License along with this library; if not, write to the Free Software
  18  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
  19  */
  20
  21 #define WIN32_LEAN_AND_MEAN
  22
  23 #include <stdarg.h>
  24 #include <windows.h>
  25 #include <winsvc.h>
  26
  27 #include "wine/unicode.h"
  28 #include "wine/debug.h"
  29 #include "services.h"
  30
  31 WINE_DEFAULT_DEBUG_CHANNEL(service);
  32
  33 LPWSTR strdupW(LPCWSTR str)
  34 {
  35     int len;
  36     WCHAR *buf;
  37
  38     if (str == NULL)
  39         return NULL;
  40     len = strlenW(str);
  41     buf = HeapAlloc(GetProcessHeap(), 0, sizeof(WCHAR)*(len+1));
  42     if (buf == NULL)
  43         return NULL;
  44     strcpyW(buf, str);
  45     return buf;
  46 }
  47
  48 BOOL check_multisz(LPCWSTR lpMultiSz, DWORD cbSize)
  49 {
  50     if (cbSize == 0 || (cbSize == sizeof(WCHAR) && lpMultiSz[0] == 0))
  51         return TRUE;
  52     if ((cbSize % sizeof(WCHAR)) != 0 || cbSize < 2*sizeof(WCHAR))
  53         return FALSE;
  54     if (lpMultiSz[cbSize/2 - 1] || lpMultiSz[cbSize/2 - 2])
  55         return FALSE;
  56     return TRUE;
  57 }
  58
  59 DWORD load_reg_string(HKEY hKey, LPCWSTR szValue, BOOL bExpand, LPWSTR *output)
  60 {
  61     DWORD size, type;
  62     LPWSTR buf = NULL;
  63     DWORD err;
  64
  65     *output = NULL;
  66     if ((err = RegQueryValueExW(hKey, szValue, 0, &type, NULL, &size)) != 0)
  67     {
  68         if (err == ERROR_FILE_NOT_FOUND)
  69             return ERROR_SUCCESS;
  70         goto failed;
  71     }
  72     if (!(type == REG_SZ || (type == REG_EXPAND_SZ && bExpand)))
  73     {
  74         err = ERROR_INVALID_DATATYPE;
  75         goto failed;
  76     }
  77     buf = HeapAlloc(GetProcessHeap(), 0, size + sizeof(WCHAR));
  78     if ((err = RegQueryValueExW(hKey, szValue, 0, &type, (LPBYTE)buf, &size)) != 0)
  79         goto failed;
  80     buf[size/sizeof(WCHAR)] = 0;
  81
  82     if (type == REG_EXPAND_SZ)
  83     {
  84         LPWSTR str;
  85         DWORD size = ExpandEnvironmentStringsW(buf, NULL, 0);
  86         if (size == 0)
  87         {
  88             err = GetLastError();
  89             goto failed;
  90         }
  91         str = HeapAlloc(GetProcessHeap(), 0, size * sizeof(WCHAR));
  92         ExpandEnvironmentStringsW(buf, str, size);
  93         HeapFree(GetProcessHeap(), 0, buf);
  94         *output = str;
  95     }
  96     else
  97         *output = buf;
  98     return ERROR_SUCCESS;
  99
 100 failed:
 101     WINE_ERR("Error %d while reading value %s\n", err, wine_dbgstr_w(szValue));
 102     HeapFree(GetProcessHeap(), 0, buf);
 103     return err;
 104 }
 105
 106 DWORD load_reg_multisz(HKEY hKey, LPCWSTR szValue, BOOL bAllowSingle, LPWSTR *output)
 107 {
 108     DWORD size, type;
 109     LPWSTR buf = NULL;
 110     DWORD err;
 111
 112     *output = NULL;
 113     if ((err = RegQueryValueExW(hKey, szValue, 0, &type, NULL, &size)) != 0)
 114     {
 115         if (err == ERROR_FILE_NOT_FOUND)
 116         {
 117             *output = HeapAlloc(GetProcessHeap(), HEAP_ZERO_MEMORY, sizeof(WCHAR));
 118             return ERROR_SUCCESS;
 119         }
 120         goto failed;
 121     }
 122     if (!((type == REG_MULTI_SZ) || ((type == REG_SZ) && bAllowSingle)))
 123     {
 124         err = ERROR_INVALID_DATATYPE;
 125         goto failed;
 126     }
 127     buf = HeapAlloc(GetProcessHeap(), 0, size + 2*sizeof(WCHAR));
 128     if ((err = RegQueryValueExW(hKey, szValue, 0, &type, (LPBYTE)buf, &size)) != 0)
 129         goto failed;
 130     buf[size/sizeof(WCHAR)] = 0;
 131     buf[size/sizeof(WCHAR) + 1] = 0;
 132     *output = buf;
 133     return ERROR_SUCCESS;
 134
 135 failed:
 136     WINE_ERR("Error %d while reading value %s\n", err, wine_dbgstr_w(szValue));
 137     HeapFree(GetProcessHeap(), 0, buf);
 138     return err;
 139 }
 140
 141 DWORD load_reg_dword(HKEY hKey, LPCWSTR szValue, DWORD *output)
 142 {
 143     DWORD size, type;
 144     DWORD err;
 145
 146     *output = 0;
 147     size = sizeof(DWORD);
 148     if ((err = RegQueryValueExW(hKey, szValue, 0, &type, (LPBYTE)output, &size)) != 0)
 149     {
 150         if (err == ERROR_FILE_NOT_FOUND)
 151             return ERROR_SUCCESS;
 152         goto failed;
 153     }
 154     if (type != REG_DWORD || size != sizeof(DWORD))
 155     {
 156         err = ERROR_INVALID_DATATYPE;
 157         goto failed;
 158     }
 159     return ERROR_SUCCESS;
 160
 161 failed:
 162     WINE_ERR("Error %d while reading value %s\n", err, wine_dbgstr_w(szValue));
 163     return err;
 164 }