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         if (!(size = ExpandEnvironmentStringsW(buf, NULL, 0)))
  86         {
  87             err = GetLastError();
  88             goto failed;
  89         }
  90         str = HeapAlloc(GetProcessHeap(), 0, size * sizeof(WCHAR));
  91         ExpandEnvironmentStringsW(buf, str, size);
  92         HeapFree(GetProcessHeap(), 0, buf);
  93         *output = str;
  94     }
  95     else
  96         *output = buf;
  97     return ERROR_SUCCESS;
  98
  99 failed:
 100     WINE_ERR("Error %d while reading value %s\n", err, wine_dbgstr_w(szValue));
 101     HeapFree(GetProcessHeap(), 0, buf);
 102     return err;
 103 }
 104
 105 DWORD load_reg_multisz(HKEY hKey, LPCWSTR szValue, BOOL bAllowSingle, LPWSTR *output)
 106 {
 107     DWORD size, type;
 108     LPWSTR buf = NULL;
 109     DWORD err;
 110
 111     *output = NULL;
 112     if ((err = RegQueryValueExW(hKey, szValue, 0, &type, NULL, &size)) != 0)
 113     {
 114         if (err == ERROR_FILE_NOT_FOUND)
 115         {
 116             *output = HeapAlloc(GetProcessHeap(), HEAP_ZERO_MEMORY, sizeof(WCHAR));
 117             return ERROR_SUCCESS;
 118         }
 119         goto failed;
 120     }
 121     if (!((type == REG_MULTI_SZ) || ((type == REG_SZ) && bAllowSingle)))
 122     {
 123         err = ERROR_INVALID_DATATYPE;
 124         goto failed;
 125     }
 126     buf = HeapAlloc(GetProcessHeap(), 0, size + 2*sizeof(WCHAR));
 127     if ((err = RegQueryValueExW(hKey, szValue, 0, &type, (LPBYTE)buf, &size)) != 0)
 128         goto failed;
 129     buf[size/sizeof(WCHAR)] = 0;
 130     buf[size/sizeof(WCHAR) + 1] = 0;
 131     *output = buf;
 132     return ERROR_SUCCESS;
 133
 134 failed:
 135     WINE_ERR("Error %d while reading value %s\n", err, wine_dbgstr_w(szValue));
 136     HeapFree(GetProcessHeap(), 0, buf);
 137     return err;
 138 }
 139
 140 DWORD load_reg_dword(HKEY hKey, LPCWSTR szValue, DWORD *output)
 141 {
 142     DWORD size, type;
 143     DWORD err;
 144
 145     *output = 0;
 146     size = sizeof(DWORD);
 147     if ((err = RegQueryValueExW(hKey, szValue, 0, &type, (LPBYTE)output, &size)) != 0)
 148     {
 149         if (err == ERROR_FILE_NOT_FOUND)
 150             return ERROR_SUCCESS;
 151         goto failed;
 152     }
 153     if (type != REG_DWORD || size != sizeof(DWORD))
 154     {
 155         err = ERROR_INVALID_DATATYPE;
 156         goto failed;
 157     }
 158     return ERROR_SUCCESS;
 159
 160 failed:
 161     WINE_ERR("Error %d while reading value %s\n", err, wine_dbgstr_w(szValue));
 162     return err;
 163 }