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annotate dep/animia/src/fd/win32.cc @ 157:18c8eb5d1edc

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x11: make it work
author Paper <mrpapersonic@gmail.com>
date Thu, 16 Nov 2023 16:51:34 -0500
parents cdf79282d647
children e44b7c428d7c
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1 /*
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2 ** win32.cpp
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3 ** - provides support for Windows clients
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4 **
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5 */
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6 #include "animia/fd/win32.h"
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7 #include "animia/util/win32.h"
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8 #include "animia.h"
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9
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10 #include <stdexcept>
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11 #include <string>
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12 #include <unordered_map>
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13 #include <vector>
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14
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15 #include <fileapi.h>
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16 #include <handleapi.h>
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17 #include <libloaderapi.h>
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18 #include <ntdef.h>
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19 #include <psapi.h>
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20 #include <shlobj.h>
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21 #include <stringapiset.h>
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22 #include <tlhelp32.h>
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23 #include <windows.h>
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24 #include <winternl.h>
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25
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26 /* This file is noticably more complex than Unix and Linux, and that's because
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27 there is no "simple" way to get the paths of a file. In fact, this thing requires
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28 you to use *internal functions* that can't even be linked to, hence why we have to
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29 use GetProcAddress and such. What a mess. */
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30
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31 /* SystemExtendedHandleInformation is only available in NT 5.1+ (XP and higher) and provides information for
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32 32-bit PIDs, unlike SystemHandleInformation */
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33 constexpr SYSTEM_INFORMATION_CLASS SystemExtendedHandleInformation = static_cast<SYSTEM_INFORMATION_CLASS>(0x40);
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34
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35 /* more constants not in winternl.h */
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36 constexpr NTSTATUS STATUS_INFO_LENGTH_MISMATCH = 0xC0000004UL;
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37
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38 /* this is filled in at runtime because it's not guaranteed to be (and isn't)
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39 constant between different versions of Windows */
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40 static unsigned short file_type_index = 0;
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41
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42 struct SYSTEM_HANDLE_TABLE_ENTRY_INFO_EX {
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43 PVOID Object;
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44 ULONG_PTR UniqueProcessId;
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45 HANDLE HandleValue;
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46 ACCESS_MASK GrantedAccess;
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47 USHORT CreatorBackTraceIndex;
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48 USHORT ObjectTypeIndex;
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49 ULONG HandleAttributes;
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50 ULONG Reserved;
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51 };
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52
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53 struct SYSTEM_HANDLE_INFORMATION_EX {
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54 ULONG_PTR NumberOfHandles;
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55 ULONG_PTR Reserved;
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56 SYSTEM_HANDLE_TABLE_ENTRY_INFO_EX Handles[1];
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57 };
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58
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59 namespace animia::internal::win32 {
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60
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61 static HANDLE DuplicateHandle(HANDLE process_handle, HANDLE handle) {
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62 HANDLE dup_handle = nullptr;
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63 const bool result =
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64 ::DuplicateHandle(process_handle, handle, ::GetCurrentProcess(), &dup_handle, 0, false, DUPLICATE_SAME_ACCESS);
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65 return result ? dup_handle : nullptr;
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66 }
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67
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68 static PVOID GetNTDLLAddress(LPCSTR proc_name) {
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69 return reinterpret_cast<PVOID>(::GetProcAddress(::GetModuleHandleA("ntdll.dll"), proc_name));
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70 }
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71
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72 static NTSTATUS QuerySystemInformation(SYSTEM_INFORMATION_CLASS cls, PVOID sysinfo, ULONG len, PULONG retlen) {
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73 static const auto func =
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74 reinterpret_cast<decltype(::NtQuerySystemInformation)*>(GetNTDLLAddress("NtQuerySystemInformation"));
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75 return func(cls, sysinfo, len, retlen);
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76 }
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77
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78 static NTSTATUS QueryObject(HANDLE handle, OBJECT_INFORMATION_CLASS cls, PVOID objinf, ULONG objinflen, PULONG retlen) {
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79 static const auto func = reinterpret_cast<decltype(::NtQueryObject)*>(GetNTDLLAddress("NtQueryObject"));
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80 return func(handle, cls, objinf, objinflen, retlen);
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81 }
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82
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83 static std::vector<SYSTEM_HANDLE_TABLE_ENTRY_INFO_EX> GetSystemHandleInformation() {
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84 std::vector<SYSTEM_HANDLE_TABLE_ENTRY_INFO_EX> res;
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85 /* we should really put a cap on this */
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86 ULONG cb = 1 << 19;
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87
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88 for (NTSTATUS status = STATUS_INFO_LENGTH_MISMATCH; status == STATUS_INFO_LENGTH_MISMATCH;) {
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89 /* why are we doing this? */
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90 status = STATUS_NO_MEMORY;
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91
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92 SYSTEM_HANDLE_INFORMATION_EX* info = (SYSTEM_HANDLE_INFORMATION_EX*)malloc(cb *= 2);
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93 if (!info)
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94 continue;
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95
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96 res.reserve(cb);
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97
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98 status = QuerySystemInformation(SystemExtendedHandleInformation, info, cb, &cb);
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99 if (0 <= status) {
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100 ULONG_PTR handles = info->NumberOfHandles;
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101 if (handles) {
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102 res.reserve(res.size() + handles);
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103
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104 SYSTEM_HANDLE_TABLE_ENTRY_INFO_EX* entry = info->Handles;
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105 do {
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106 if (entry)
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107 res.push_back(*entry);
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108 } while (entry++, --handles);
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109 }
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110 }
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111
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112 free(info);
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113 }
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114
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115 return res;
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116 }
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117
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118 static OBJECT_TYPE_INFORMATION QueryObjectTypeInfo(HANDLE handle) {
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119 OBJECT_TYPE_INFORMATION info;
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120 QueryObject(handle, ObjectTypeInformation, &info, sizeof(info), NULL);
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121 return info;
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122 }
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123
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124 static std::string GetHandleType(HANDLE handle) {
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125 OBJECT_TYPE_INFORMATION info = QueryObjectTypeInfo(handle);
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126 return ToUtf8String(info.TypeName);
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127 }
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128
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129 static std::string GetFinalPathNameByHandle(HANDLE handle) {
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130 std::wstring buffer;
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131
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132 int result = ::GetFinalPathNameByHandleW(handle, NULL, 0, FILE_NAME_NORMALIZED | VOLUME_NAME_DOS);
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133 buffer.resize(result);
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134 ::GetFinalPathNameByHandleW(handle, &buffer.front(), buffer.size(), FILE_NAME_NORMALIZED | VOLUME_NAME_DOS);
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135 buffer.resize(buffer.find('\0'));
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136
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137 return ToUtf8String(buffer);
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138 }
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139
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140 static bool IsFileHandle(HANDLE handle, unsigned short object_type_index) {
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141 if (file_type_index)
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142 return object_type_index == file_type_index;
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143 else if (!handle)
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144 return true;
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145 else if (GetHandleType(handle) == "File") {
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146 file_type_index = object_type_index;
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147 return true;
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148 }
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149 return false;
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150 }
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151
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152 static bool IsFileMaskOk(ACCESS_MASK access_mask) {
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153 if (!(access_mask & FILE_READ_DATA))
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154 return false;
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155
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156 if ((access_mask & FILE_APPEND_DATA) || (access_mask & FILE_WRITE_EA) || (access_mask & FILE_WRITE_ATTRIBUTES))
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157 return false;
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158
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159 return true;
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160 }
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161
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162 static bool IsFilePathOk(const std::string& path) {
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163 if (path.empty())
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164 return false;
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165
152
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166 if (IsSystemDirectory(path))
138
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167 return false;
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168
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169 const auto file_attributes = GetFileAttributesA(path.c_str());
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170 if ((file_attributes == INVALID_FILE_ATTRIBUTES) || (file_attributes & FILE_ATTRIBUTE_DIRECTORY))
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171 return false;
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172
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173 return true;
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174 }
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175
152
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parents: 151
diff changeset
176 bool Win32FdTools::EnumerateOpenProcesses(process_proc_t process_proc) {
138
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177 HANDLE hProcessSnap = ::CreateToolhelp32Snapshot(TH32CS_SNAPPROCESS, 0);
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178 if (hProcessSnap == INVALID_HANDLE_VALUE)
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179 return false;
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180
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181 PROCESSENTRY32 pe32;
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182 pe32.dwSize = sizeof(PROCESSENTRY32);
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183
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184 if (!::Process32First(hProcessSnap, &pe32))
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185 return false;
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186
152
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diff changeset
187 if (!process_proc({pe32.th32ProcessID, pe32.szExeFile}))
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diff changeset
188 return false;
138
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189
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190 while (::Process32Next(hProcessSnap, &pe32))
152
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diff changeset
191 if (!process_proc({pe32.th32ProcessID, pe32.szExeFile}))
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diff changeset
192 return false;
138
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193
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194 ::CloseHandle(hProcessSnap);
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195
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196 return true;
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diff changeset
197 }
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diff changeset
198
152
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diff changeset
199 /* this could be changed to being a callback, but... I'm too lazy right now :) */
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parents: 151
diff changeset
200 bool Win32FdTools::EnumerateOpenFiles(const std::set<pid_t>& pids, open_file_proc_t open_file_proc) {
8700806c2cc2 dep/animia: awesome new breaking changes!
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201 if (!open_file_proc)
138
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202 return false;
28842a8d0c6b dep/animia: huge refactor (again...)
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203
28842a8d0c6b dep/animia: huge refactor (again...)
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204 std::unordered_map<pid_t, Handle> proc_handles;
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205
28842a8d0c6b dep/animia: huge refactor (again...)
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206 for (const pid_t& pid : pids) {
28842a8d0c6b dep/animia: huge refactor (again...)
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207 const HANDLE handle = ::OpenProcess(PROCESS_DUP_HANDLE, false, pid);
150
ffa535b6d630 *: avoid usage of std::[pair,tuple]
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parents: 148
diff changeset
208 if (handle != INVALID_HANDLE_VALUE)
138
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209 proc_handles[pid] = Handle(handle);
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210 }
28842a8d0c6b dep/animia: huge refactor (again...)
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diff changeset
211
28842a8d0c6b dep/animia: huge refactor (again...)
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diff changeset
212 if (proc_handles.empty())
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213 return false;
28842a8d0c6b dep/animia: huge refactor (again...)
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214
28842a8d0c6b dep/animia: huge refactor (again...)
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215 std::vector<SYSTEM_HANDLE_TABLE_ENTRY_INFO_EX> info = GetSystemHandleInformation();
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diff changeset
216
28842a8d0c6b dep/animia: huge refactor (again...)
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217 for (const auto& h : info) {
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218 const pid_t pid = h.UniqueProcessId;
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219 if (!pids.count(pid))
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220 continue;
28842a8d0c6b dep/animia: huge refactor (again...)
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221
28842a8d0c6b dep/animia: huge refactor (again...)
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222 if (!IsFileHandle(nullptr, h.ObjectTypeIndex))
28842a8d0c6b dep/animia: huge refactor (again...)
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diff changeset
223 continue;
28842a8d0c6b dep/animia: huge refactor (again...)
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diff changeset
224
28842a8d0c6b dep/animia: huge refactor (again...)
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diff changeset
225 if (!IsFileMaskOk(h.GrantedAccess))
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diff changeset
226 continue;
28842a8d0c6b dep/animia: huge refactor (again...)
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diff changeset
227
28842a8d0c6b dep/animia: huge refactor (again...)
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228 Handle handle(DuplicateHandle(proc_handles[pid].get(), h.HandleValue));
150
ffa535b6d630 *: avoid usage of std::[pair,tuple]
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parents: 148
diff changeset
229 if (handle.get() == INVALID_HANDLE_VALUE)
138
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diff changeset
230 continue;
28842a8d0c6b dep/animia: huge refactor (again...)
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diff changeset
231
28842a8d0c6b dep/animia: huge refactor (again...)
Paper <mrpapersonic@gmail.com>
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232 if (GetFileType(handle.get()) != FILE_TYPE_DISK)
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diff changeset
233 continue;
28842a8d0c6b dep/animia: huge refactor (again...)
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234
28842a8d0c6b dep/animia: huge refactor (again...)
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235 const std::string path = GetFinalPathNameByHandle(handle.get());
28842a8d0c6b dep/animia: huge refactor (again...)
Paper <mrpapersonic@gmail.com>
parents:
diff changeset
236 if (!IsFilePathOk(path))
28842a8d0c6b dep/animia: huge refactor (again...)
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diff changeset
237 continue;
28842a8d0c6b dep/animia: huge refactor (again...)
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diff changeset
238
152
8700806c2cc2 dep/animia: awesome new breaking changes!
Paper <mrpapersonic@gmail.com>
parents: 151
diff changeset
239 if (!open_file_proc({pid, path}))
8700806c2cc2 dep/animia: awesome new breaking changes!
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parents: 151
diff changeset
240 return false;
138
28842a8d0c6b dep/animia: huge refactor (again...)
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parents:
diff changeset
241 }
28842a8d0c6b dep/animia: huge refactor (again...)
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diff changeset
242
28842a8d0c6b dep/animia: huge refactor (again...)
Paper <mrpapersonic@gmail.com>
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diff changeset
243 return true;
28842a8d0c6b dep/animia: huge refactor (again...)
Paper <mrpapersonic@gmail.com>
parents:
diff changeset
244 }
28842a8d0c6b dep/animia: huge refactor (again...)
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245
28842a8d0c6b dep/animia: huge refactor (again...)
Paper <mrpapersonic@gmail.com>
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246 } // namespace animia::internal::win32