setup_native/source/win32/customactions/shellextensions/copyeditiondata.cxx

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  28
  29 #include "sal/config.h"
  30
  31 #include <cstddef>
  32 #include <new>
  33 #include <string.h> // <cstring> not supported by old MSC versions
  34
  35 #define WIN32_LEAN_AND_MEAN
  36 #if defined _MSC_VER
  37 #pragma warning(push, 1)
  38 #endif
  39 #include <windows.h>
  40 #include <msiquery.h>
  41 #include <shellapi.h>
  42 #if defined _MSC_VER
  43 #pragma warning(pop)
  44 #endif
  45
  46 #include "boost/scoped_array.hpp"
  47
  48 #define LCL_LENGTH0(s) (sizeof (s) / sizeof *(s))
  49 #define LCL_STRING0(s) (s), LCL_LENGTH0(s)
  50
  51 namespace {
  52
  53 enum Status { STATUS_NO, STATUS_YES, STATUS_ERROR };
  54
  55 Status fileExists(wchar_t const * path) {
  56     return GetFileAttributesW(path) == INVALID_FILE_ATTRIBUTES
  57         ? GetLastError() == ERROR_FILE_NOT_FOUND ? STATUS_NO : STATUS_ERROR
  58         : STATUS_YES;
  59 }
  60
  61 wchar_t * getProperty(
  62     MSIHANDLE install, wchar_t const * name, wchar_t const * suffix,
  63     std::size_t suffixLength, wchar_t ** end = NULL)
  64 {
  65     DWORD n = 0;
  66     UINT err = MsiGetPropertyW(install, name, L"", &n);
  67     if (err != ERROR_SUCCESS && err != ERROR_MORE_DATA) {
  68         return NULL;
  69     }
  70     DWORD n2 = n + suffixLength; //TODO: overflow
  71     wchar_t * data = new(std::nothrow) wchar_t[n2];
  72     if (data == NULL) {
  73         return NULL;
  74     }
  75     if (MsiGetPropertyW(install, name, data, &n2) != ERROR_SUCCESS || n2 != n) {
  76         delete[] data;
  77         return NULL;
  78     }
  79     memcpy(data + n, suffix, suffixLength * sizeof (wchar_t)); //TODO: overflow
  80     if (end != NULL) {
  81         *end = data + n + suffixLength;
  82     }
  83     return data;
  84 }
  85
  86 }
  87
  88 extern "C" UINT __stdcall copyEditionData(MSIHANDLE install) {
  89     boost::scoped_array<wchar_t> from(
  90         getProperty(install, L"SourceDir", LCL_STRING0(L"edition\0")));
  91     if (!from) {
  92         return ERROR_INSTALL_FAILURE;
  93     }
  94     Status stat = fileExists(from.get());
  95     if (stat == STATUS_ERROR) {
  96         return ERROR_INSTALL_FAILURE;
  97     }
  98     if (stat == STATUS_NO) {
  99         return ERROR_SUCCESS;
 100     }
 101     wchar_t * end;
 102     boost::scoped_array<wchar_t> to(
 103         getProperty(
 104             install, L"INSTALLLOCATION",
 105             LCL_STRING0(L"program\\edition\0"), &end));
 106     if (!to) {
 107         return ERROR_INSTALL_FAILURE;
 108     }
 109     stat = fileExists(to.get());
 110     if (stat == STATUS_ERROR) {
 111         return ERROR_INSTALL_FAILURE;
 112     }
 113     if (stat == STATUS_YES) {
 114         SHFILEOPSTRUCTW opDelete = {
 115             NULL, FO_DELETE, to.get(), NULL, FOF_NOCONFIRMATION | FOF_SILENT,
 116             FALSE, NULL, NULL }; //TODO: non-NULL hwnd
 117         if (SHFileOperationW(&opDelete) != 0) {
 118             return ERROR_INSTALL_FAILURE;
 119         }
 120     }
 121     *(end - LCL_LENGTH0(L"\\edition\0")) = L'\0';
 122     *(end - LCL_LENGTH0(L"\\edition\0") + 1) = L'\0';
 123     SHFILEOPSTRUCTW opCopy = {
 124         NULL, FO_COPY, from.get(), to.get(),
 125         FOF_NOCONFIRMATION | FOF_NOCONFIRMMKDIR | FOF_SILENT, FALSE, NULL,
 126         NULL }; //TODO: non-NULL hwnd
 127     if (SHFileOperationW(&opCopy) != 0) {
 128         return ERROR_INSTALL_FAILURE;
 129     }
 130     return ERROR_SUCCESS;
 131 }
 132
 133 /* vim:set shiftwidth=4 softtabstop=4 expandtab: */