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/debug.h"
  28 #include "services.h"
  29
  30 WINE_DEFAULT_DEBUG_CHANNEL(service);
  31
  32 LPWSTR strdupW(LPCWSTR str)
  33 {
  34     int len;
  35     WCHAR *buf;
  36
  37     if (str == NULL)
  38         return NULL;
  39     len = lstrlenW(str);
  40     buf = HeapAlloc(GetProcessHeap(), 0, sizeof(WCHAR)*(len+1));
  41     if (buf == NULL)
  42         return NULL;
  43     lstrcpyW(buf, str);
  44     return buf;
  45 }
  46
  47 BOOL check_multisz(LPCWSTR lpMultiSz, DWORD cbSize)
  48 {
  49     if (cbSize == 0 || (cbSize == sizeof(WCHAR) && lpMultiSz[0] == 0))
  50         return TRUE;
  51     if ((cbSize % sizeof(WCHAR)) != 0 || cbSize < 2*sizeof(WCHAR))
  52         return FALSE;
  53     if (lpMultiSz[cbSize/2 - 1] || lpMultiSz[cbSize/2 - 2])
  54         return FALSE;
  55     return TRUE;
  56 }
  57
  58 DWORD load_reg_string(HKEY hKey, LPCWSTR szValue, BOOL bExpand, LPWSTR *output)
  59 {
  60     DWORD size, type;
  61     LPWSTR buf = NULL;
  62     DWORD err;
  63
  64     *output = NULL;
  65     if ((err = RegQueryValueExW(hKey, szValue, 0, &type, NULL, &size)) != 0)
  66     {
  67         if (err == ERROR_FILE_NOT_FOUND)
  68             return ERROR_SUCCESS;
  69         goto failed;
  70     }
  71     if (!(type == REG_SZ || (type == REG_EXPAND_SZ && bExpand)))
  72     {
  73         err = ERROR_INVALID_DATATYPE;
  74         goto failed;
  75     }
  76     buf = HeapAlloc(GetProcessHeap(), 0, size + sizeof(WCHAR));
  77     if ((err = RegQueryValueExW(hKey, szValue, 0, &type, (LPBYTE)buf, &size)) != 0)
  78         goto failed;
  79     buf[size/sizeof(WCHAR)] = 0;
  80
  81     if (type == REG_EXPAND_SZ)
  82     {
  83         LPWSTR str;
  84         if (!(size = ExpandEnvironmentStringsW(buf, NULL, 0)))
  85         {
  86             err = GetLastError();
  87             goto failed;
  88         }
  89         str = HeapAlloc(GetProcessHeap(), 0, size * sizeof(WCHAR));
  90         ExpandEnvironmentStringsW(buf, str, size);
  91         HeapFree(GetProcessHeap(), 0, buf);
  92         *output = str;
  93     }
  94     else
  95         *output = buf;
  96     return ERROR_SUCCESS;
  97
  98 failed:
  99     WINE_ERR("Error %ld while reading value %s\n", err, wine_dbgstr_w(szValue));
 100     HeapFree(GetProcessHeap(), 0, buf);
 101     return err;
 102 }
 103
 104 DWORD load_reg_multisz(HKEY hKey, LPCWSTR szValue, BOOL bAllowSingle, LPWSTR *output)
 105 {
 106     DWORD size, type;
 107     LPWSTR buf = NULL;
 108     DWORD err;
 109
 110     *output = NULL;
 111     if ((err = RegQueryValueExW(hKey, szValue, 0, &type, NULL, &size)) != 0)
 112     {
 113         if (err == ERROR_FILE_NOT_FOUND)
 114         {
 115             *output = HeapAlloc(GetProcessHeap(), HEAP_ZERO_MEMORY, sizeof(WCHAR));
 116             return ERROR_SUCCESS;
 117         }
 118         goto failed;
 119     }
 120     if (!((type == REG_MULTI_SZ) || ((type == REG_SZ) && bAllowSingle)))
 121     {
 122         err = ERROR_INVALID_DATATYPE;
 123         goto failed;
 124     }
 125     buf = HeapAlloc(GetProcessHeap(), 0, size + 2*sizeof(WCHAR));
 126     if ((err = RegQueryValueExW(hKey, szValue, 0, &type, (LPBYTE)buf, &size)) != 0)
 127         goto failed;
 128     buf[size/sizeof(WCHAR)] = 0;
 129     buf[size/sizeof(WCHAR) + 1] = 0;
 130     *output = buf;
 131     return ERROR_SUCCESS;
 132
 133 failed:
 134     WINE_ERR("Error %ld while reading value %s\n", err, wine_dbgstr_w(szValue));
 135     HeapFree(GetProcessHeap(), 0, buf);
 136     return err;
 137 }
 138
 139 DWORD load_reg_dword(HKEY hKey, LPCWSTR szValue, DWORD *output)
 140 {
 141     DWORD size, type;
 142     DWORD err;
 143
 144     *output = 0;
 145     size = sizeof(DWORD);
 146     if ((err = RegQueryValueExW(hKey, szValue, 0, &type, (LPBYTE)output, &size)) != 0)
 147     {
 148         if (err == ERROR_FILE_NOT_FOUND)
 149             return ERROR_SUCCESS;
 150         goto failed;
 151     }
 152     if ((type != REG_DWORD && type != REG_BINARY) || size != sizeof(DWORD))
 153     {
 154         err = ERROR_INVALID_DATATYPE;
 155         goto failed;
 156     }
 157     return ERROR_SUCCESS;
 158
 159 failed:
 160     WINE_ERR("Error %ld while reading value %s\n", err, wine_dbgstr_w(szValue));
 161     return err;
 162 }