1 | /* $Id: pathint-nt.cpp 98103 2023-01-17 14:15:46Z vboxsync $ */
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2 | /** @file
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3 | * IPRT - Native NT, Internal Path stuff.
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4 | */
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5 |
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6 | /*
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7 | * Copyright (C) 2006-2023 Oracle and/or its affiliates.
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8 | *
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9 | * This file is part of VirtualBox base platform packages, as
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10 | * available from https://www.virtualbox.org.
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11 | *
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12 | * This program is free software; you can redistribute it and/or
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13 | * modify it under the terms of the GNU General Public License
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14 | * as published by the Free Software Foundation, in version 3 of the
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15 | * License.
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16 | *
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17 | * This program is distributed in the hope that it will be useful, but
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18 | * WITHOUT ANY WARRANTY; without even the implied warranty of
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19 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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20 | * General Public License for more details.
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21 | *
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22 | * You should have received a copy of the GNU General Public License
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23 | * along with this program; if not, see <https://www.gnu.org/licenses>.
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24 | *
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25 | * The contents of this file may alternatively be used under the terms
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26 | * of the Common Development and Distribution License Version 1.0
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27 | * (CDDL), a copy of it is provided in the "COPYING.CDDL" file included
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28 | * in the VirtualBox distribution, in which case the provisions of the
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29 | * CDDL are applicable instead of those of the GPL.
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30 | *
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31 | * You may elect to license modified versions of this file under the
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32 | * terms and conditions of either the GPL or the CDDL or both.
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33 | *
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34 | * SPDX-License-Identifier: GPL-3.0-only OR CDDL-1.0
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35 | */
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36 |
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37 |
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38 | /*********************************************************************************************************************************
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39 | * Header Files *
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40 | *********************************************************************************************************************************/
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41 | #define LOG_GROUP RTLOGGROUP_FS
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42 | #include "internal-r3-nt.h"
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43 |
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44 | #include <iprt/assert.h>
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45 | #include <iprt/err.h>
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46 | #include <iprt/mem.h>
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47 | #include <iprt/path.h>
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48 | #include <iprt/string.h>
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49 | #include <iprt/utf16.h>
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50 |
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51 |
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52 | /*********************************************************************************************************************************
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53 | * Global Variables *
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54 | *********************************************************************************************************************************/
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55 | static char const g_szPrefixUnc[] = "\\??\\UNC\\";
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56 | static char const g_szPrefix[] = "\\??\\";
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57 | static char const g_szPrefixNt3xUnc[] = "\\DosDevices\\UNC\\";
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58 | static char const g_szPrefixNt3x[] = "\\DosDevices\\";
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59 |
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60 |
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61 | /**
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62 | * Handles the pass thru case for UTF-8 input.
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63 | * Win32 path uses "\\?\" prefix which is converted to "\??\" NT prefix.
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64 | *
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65 | * @returns IPRT status code.
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66 | * @param pNtName Where to return the NT name.
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67 | * @param phRootDir Where to return the root handle, if applicable.
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68 | * @param pszPath The UTF-8 path.
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69 | */
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70 | static int rtNtPathFromWinUtf8PassThru(struct _UNICODE_STRING *pNtName, PHANDLE phRootDir, const char *pszPath)
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71 | {
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72 | PRTUTF16 pwszPath = NULL;
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73 | size_t cwcLen;
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74 | int rc = RTStrToUtf16Ex(pszPath, RTSTR_MAX, &pwszPath, 0, &cwcLen);
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75 | if (RT_SUCCESS(rc))
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76 | {
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77 | if (cwcLen < _32K - 1)
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78 | {
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79 | *phRootDir = NULL;
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80 | if (RT_MAKE_U64(RTNtCurrentPeb()->OSMinorVersion, RTNtCurrentPeb()->OSMajorVersion) >= RT_MAKE_U64(0, 4))
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81 | {
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82 | pwszPath[0] = '\\';
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83 | pwszPath[1] = '?';
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84 | pwszPath[2] = '?';
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85 | pwszPath[3] = '\\';
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86 |
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87 | pNtName->Buffer = pwszPath;
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88 | pNtName->Length = (uint16_t)(cwcLen * sizeof(RTUTF16));
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89 | pNtName->MaximumLength = pNtName->Length + sizeof(RTUTF16);
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90 | return VINF_SUCCESS;
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91 | }
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92 |
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93 | rc = RTUtf16Realloc(&pwszPath, cwcLen + sizeof(g_szPrefixNt3x));
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94 | if (RT_SUCCESS(rc))
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95 | {
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96 | memmove(&pwszPath[sizeof(g_szPrefixNt3x) - 1], &pwszPath[4], (cwcLen - 4 + 1) * sizeof(RTUTF16));
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97 | for (uint32_t i = 0; i < sizeof(g_szPrefixNt3x) - 1; i++)
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98 | pwszPath[i] = g_szPrefixNt3x[i];
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99 |
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100 | pNtName->Buffer = pwszPath;
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101 | pNtName->Length = (uint16_t)((cwcLen - 4 + sizeof(g_szPrefixNt3x) - 1) * sizeof(RTUTF16));
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102 | pNtName->MaximumLength = pNtName->Length + sizeof(RTUTF16);
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103 | return VINF_SUCCESS;
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104 | }
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105 | }
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106 |
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107 | RTUtf16Free(pwszPath);
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108 | rc = VERR_FILENAME_TOO_LONG;
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109 | }
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110 | return rc;
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111 | }
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112 |
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113 |
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114 | /**
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115 | * Handles the pass thru case for UTF-16 input.
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116 | * Win32 path uses "\\?\" prefix which is converted to "\??\" NT prefix.
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117 | *
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118 | * @returns IPRT status code.
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119 | * @param pNtName Where to return the NT name.
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120 | * @param phRootDir Stores NULL here, as we don't use it.
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121 | * @param pwszWinPath The UTF-16 windows-style path.
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122 | * @param cwcWinPath The length of the windows-style input path.
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123 | */
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124 | static int rtNtPathFromWinUtf16PassThru(struct _UNICODE_STRING *pNtName, PHANDLE phRootDir,
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125 | PCRTUTF16 pwszWinPath, size_t cwcWinPath)
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126 | {
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127 | /* Check length and allocate memory for it. */
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128 | int rc;
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129 | if (cwcWinPath < _32K - 1)
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130 | {
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131 |
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132 | size_t const cwcExtraPrefix = RT_MAKE_U64(RTNtCurrentPeb()->OSMinorVersion, RTNtCurrentPeb()->OSMajorVersion)
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133 | >= RT_MAKE_U64(0, 4)
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134 | ? 0 : sizeof(g_szPrefixNt3x) - 1 - 4;
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135 | PRTUTF16 pwszNtPath = (PRTUTF16)RTUtf16Alloc((cwcExtraPrefix + cwcWinPath + 1) * sizeof(RTUTF16));
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136 | if (pwszNtPath)
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137 | {
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138 | /* Intialize the path. */
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139 | if (!cwcExtraPrefix)
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140 | {
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141 | pwszNtPath[0] = '\\';
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142 | pwszNtPath[1] = '?';
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143 | pwszNtPath[2] = '?';
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144 | pwszNtPath[3] = '\\';
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145 | }
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146 | else
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147 | for (uint32_t i = 0; i < sizeof(g_szPrefixNt3x) - 1; i++)
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148 | pwszNtPath[i] = g_szPrefixNt3x[i];
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149 | memcpy(pwszNtPath + cwcExtraPrefix + 4, pwszWinPath + 4, (cwcWinPath - 4) * sizeof(RTUTF16));
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150 | pwszNtPath[cwcExtraPrefix + cwcWinPath] = '\0';
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151 |
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152 | /* Initialize the return values. */
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153 | pNtName->Buffer = pwszNtPath;
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154 | pNtName->Length = (uint16_t)(cwcExtraPrefix + cwcWinPath * sizeof(RTUTF16));
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155 | pNtName->MaximumLength = pNtName->Length + sizeof(RTUTF16);
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156 | *phRootDir = NULL;
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157 |
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158 | rc = VINF_SUCCESS;
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159 | }
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160 | else
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161 | rc = VERR_NO_UTF16_MEMORY;
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162 | }
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163 | else
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164 | rc = VERR_FILENAME_TOO_LONG;
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165 | return rc;
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166 | }
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167 |
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168 |
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169 |
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170 |
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171 |
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172 | /**
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173 | * Converts the path to UTF-16 and sets all the return values.
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174 | *
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175 | * @returns IPRT status code.
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176 | * @param pNtName Where to return the NT name.
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177 | * @param phRootDir Where to return the root handle, if applicable.
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178 | * @param pszPath The UTF-8 path.
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179 | */
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180 | static int rtNtPathUtf8ToUniStr(struct _UNICODE_STRING *pNtName, PHANDLE phRootDir, const char *pszPath)
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181 | {
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182 | PRTUTF16 pwszPath = NULL;
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183 | size_t cwcLen;
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184 | int rc = RTStrToUtf16Ex(pszPath, RTSTR_MAX, &pwszPath, 0, &cwcLen);
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185 | if (RT_SUCCESS(rc))
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186 | {
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187 | if (cwcLen < _32K - 1)
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188 | {
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189 | pNtName->Buffer = pwszPath;
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190 | pNtName->Length = (uint16_t)(cwcLen * sizeof(RTUTF16));
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191 | pNtName->MaximumLength = pNtName->Length + sizeof(RTUTF16);
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192 | *phRootDir = NULL;
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193 | return VINF_SUCCESS;
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194 | }
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195 |
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196 | RTUtf16Free(pwszPath);
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197 | rc = VERR_FILENAME_TOO_LONG;
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198 | }
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199 | return rc;
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200 | }
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201 |
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202 |
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203 | /**
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204 | * Converts a windows-style path to NT format and encoding.
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205 | *
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206 | * @returns IPRT status code.
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207 | * @param pNtName Where to return the NT name. Free using
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208 | * rtTNtPathToNative.
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209 | * @param phRootDir Where to return the root handle, if applicable.
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210 | * @param pszPath The UTF-8 path.
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211 | */
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212 | static int rtNtPathToNative(struct _UNICODE_STRING *pNtName, PHANDLE phRootDir, const char *pszPath)
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213 | {
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214 | /** @todo This code sucks a bit performance wise, esp. calling
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215 | * generic RTPathAbs. Too many buffers involved, I think. */
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216 |
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217 | /*
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218 | * Very simple conversion of a win32-like path into an NT path.
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219 | */
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220 | const char *pszPrefix;
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221 | size_t cchPrefix;
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222 | if (RT_MAKE_U64(RTNtCurrentPeb()->OSMinorVersion, RTNtCurrentPeb()->OSMajorVersion) >= RT_MAKE_U64(0, 4))
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223 | {
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224 | pszPrefix = g_szPrefix;
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225 | cchPrefix = sizeof(g_szPrefix) - 1;
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226 | }
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227 | else
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228 | {
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229 | pszPrefix = g_szPrefixNt3x;
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230 | cchPrefix = sizeof(g_szPrefixNt3x) - 1;
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231 | }
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232 |
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233 | size_t cchSkip = 0;
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234 | if ( RTPATH_IS_SLASH(pszPath[0])
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235 | && RTPATH_IS_SLASH(pszPath[1])
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236 | && !RTPATH_IS_SLASH(pszPath[2])
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237 | && pszPath[2])
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238 | {
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239 | #ifdef IPRT_WITH_NT_PATH_PASSTHRU
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240 | /*
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241 | * Special trick: The path starts with RTPATH_NT_PASSTHRU_PREFIX, we will skip past the bang and pass it thru.
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242 | */
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243 | if ( pszPath[2] == ':'
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244 | && pszPath[3] == 'i'
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245 | && pszPath[4] == 'p'
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246 | && pszPath[5] == 'r'
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247 | && pszPath[6] == 't'
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248 | && pszPath[7] == 'n'
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249 | && pszPath[8] == 't'
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250 | && pszPath[9] == ':'
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251 | && RTPATH_IS_SLASH(pszPath[10]))
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252 | return rtNtPathUtf8ToUniStr(pNtName, phRootDir, pszPath + 10);
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253 | #endif
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254 |
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255 | if ( pszPath[2] == '?'
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256 | && RTPATH_IS_SLASH(pszPath[3]))
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257 | return rtNtPathFromWinUtf8PassThru(pNtName, phRootDir, pszPath);
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258 |
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259 | if ( pszPath[2] == '.'
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260 | && RTPATH_IS_SLASH(pszPath[3]))
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261 | {
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262 | /*
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263 | * Device path.
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264 | * Note! I suspect \\.\stuff\..\otherstuff may be handled differently by windows.
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265 | */
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266 | cchSkip = 4;
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267 | }
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268 | else
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269 | {
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270 | /* UNC */
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271 | if (RT_MAKE_U64(RTNtCurrentPeb()->OSMinorVersion, RTNtCurrentPeb()->OSMajorVersion) >= RT_MAKE_U64(0, 4))
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272 | {
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273 | pszPrefix = g_szPrefixUnc;
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274 | cchPrefix = sizeof(g_szPrefixUnc) - 1;
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275 | }
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276 | else
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277 | {
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278 | pszPrefix = g_szPrefixNt3xUnc;
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279 | cchPrefix = sizeof(g_szPrefixNt3xUnc) - 1;
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280 | }
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281 | cchSkip = 2;
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282 | }
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283 | }
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284 |
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285 | /*
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286 | * Straighten out all .. and uncessary . references and convert slashes.
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287 | */
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288 | char szAbsPathBuf[RTPATH_MAX];
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289 | size_t cbAbsPath = sizeof(szAbsPathBuf) - (cchPrefix - cchSkip);
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290 | char *pszAbsPath = szAbsPathBuf;
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291 | char *pszAbsPathFree = NULL;
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292 | int rc = RTPathAbsEx(NULL, pszPath, RTPATH_STR_F_STYLE_DOS, &pszAbsPath[cchPrefix - cchSkip], &cbAbsPath);
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293 | if (RT_SUCCESS(rc))
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294 | { /* likely */ }
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295 | else if (rc == VERR_BUFFER_OVERFLOW)
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296 | {
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297 | unsigned cTries = 8;
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298 | size_t cbAbsPathBuf = RTPATH_MAX;
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299 | for (;;)
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300 | {
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301 | cbAbsPathBuf = RT_MAX(RT_ALIGN_Z((cchPrefix - cchSkip) + cbAbsPath + 32, 64), cbAbsPathBuf + 256);
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302 | if (cTries == 1)
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303 | cbAbsPathBuf = RT_MAX(cbAbsPathBuf, RTPATH_BIG_MAX * 2);
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304 | pszAbsPathFree = pszAbsPath = (char *)RTMemTmpAlloc(cbAbsPathBuf);
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305 | if (!pszAbsPath)
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306 | return VERR_NO_TMP_MEMORY;
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307 |
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308 | cbAbsPath = cbAbsPathBuf - (cchPrefix - cchSkip);
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309 | rc = RTPathAbsEx(NULL, pszPath, RTPATH_STR_F_STYLE_DOS, &pszAbsPath[cchPrefix - cchSkip], &cbAbsPath);
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310 | if (RT_SUCCESS(rc))
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311 | break;
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312 | RTMemTmpFree(pszAbsPathFree);
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313 | pszAbsPathFree = NULL;
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314 | if (rc != VERR_BUFFER_OVERFLOW)
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315 | return rc;
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316 | if (--cTries == 0)
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317 | return VERR_FILENAME_TOO_LONG;
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318 | }
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319 | }
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320 | else
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321 | return rc;
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322 |
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323 | /*
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324 | * Add prefix and convert it to UTF16.
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325 | */
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326 | memcpy(pszAbsPath, pszPrefix, cchPrefix);
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327 | rc = rtNtPathUtf8ToUniStr(pNtName, phRootDir, pszAbsPath);
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328 |
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329 | if (pszAbsPathFree)
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330 | RTMemTmpFree(pszAbsPathFree);
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331 | return rc;
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332 | }
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333 |
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334 |
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335 | /**
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336 | * Converts a windows-style path to NT format and encoding.
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337 | *
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338 | * @returns IPRT status code.
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339 | * @param pNtName Where to return the NT name. Free using
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340 | * RTNtPathToNative.
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341 | * @param phRootDir Where to return the root handle, if applicable.
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342 | * @param pszPath The UTF-8 path.
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343 | */
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344 | RTDECL(int) RTNtPathFromWinUtf8(struct _UNICODE_STRING *pNtName, PHANDLE phRootDir, const char *pszPath)
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345 | {
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346 | return rtNtPathToNative(pNtName, phRootDir, pszPath);
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347 | }
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348 |
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349 |
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350 | /**
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351 | * Converts a UTF-16 windows-style path to NT format.
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352 | *
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353 | * @returns IPRT status code.
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354 | * @param pNtName Where to return the NT name. Free using
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355 | * RTNtPathFree.
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356 | * @param phRootDir Where to return the root handle, if applicable.
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357 | * @param pwszWinPath The UTF-16 windows-style path.
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358 | * @param cwcWinPath The max length of the windows-style path in
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359 | * RTUTF16 units. Use RTSTR_MAX if unknown and @a
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360 | * pwszWinPath is correctly terminated.
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361 | */
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362 | RTDECL(int) RTNtPathFromWinUtf16Ex(struct _UNICODE_STRING *pNtName, HANDLE *phRootDir, PCRTUTF16 pwszWinPath, size_t cwcWinPath)
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363 | {
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364 | /*
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365 | * Validate the input, calculating the correct length.
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366 | */
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367 | if (cwcWinPath == 0 || *pwszWinPath == '\0')
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368 | return VERR_INVALID_NAME;
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369 |
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370 | RTUtf16NLenEx(pwszWinPath, cwcWinPath, &cwcWinPath);
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371 | int rc = RTUtf16ValidateEncodingEx(pwszWinPath, cwcWinPath, 0);
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372 | if (RT_FAILURE(rc))
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373 | return rc;
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374 |
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375 | /*
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376 | * Very simple conversion of a win32-like path into an NT path.
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377 | */
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378 | const char *pszPrefix = g_szPrefix;
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379 | size_t cchPrefix = sizeof(g_szPrefix) - 1;
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380 | size_t cchSkip = 0;
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381 |
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382 | if ( RTPATH_IS_SLASH(pwszWinPath[0])
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383 | && cwcWinPath >= 3
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384 | && RTPATH_IS_SLASH(pwszWinPath[1])
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385 | && !RTPATH_IS_SLASH(pwszWinPath[2]) )
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386 | {
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387 | #ifdef IPRT_WITH_NT_PATH_PASSTHRU
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388 | /*
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389 | * Special trick: The path starts with RTPATH_NT_PASSTHRU_PREFIX, we will skip past the bang and pass it thru.
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390 | */
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391 | if ( cwcWinPath >= sizeof(RTPATH_NT_PASSTHRU_PREFIX) - 1U
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392 | && pwszWinPath[2] == ':'
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393 | && pwszWinPath[3] == 'i'
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394 | && pwszWinPath[4] == 'p'
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395 | && pwszWinPath[5] == 'r'
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396 | && pwszWinPath[6] == 't'
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397 | && pwszWinPath[7] == 'n'
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398 | && pwszWinPath[8] == 't'
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399 | && pwszWinPath[9] == ':'
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400 | && RTPATH_IS_SLASH(pwszWinPath[10]) )
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401 | {
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402 | pwszWinPath += 10;
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403 | cwcWinPath -= 10;
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404 | if (cwcWinPath < _32K - 1)
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405 | {
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406 | PRTUTF16 pwszNtPath = RTUtf16Alloc((cwcWinPath + 1) * sizeof(RTUTF16));
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407 | if (pwszNtPath)
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408 | {
|
---|
409 | memcpy(pwszNtPath, pwszWinPath, cwcWinPath * sizeof(RTUTF16));
|
---|
410 | pwszNtPath[cwcWinPath] = '\0';
|
---|
411 | pNtName->Buffer = pwszNtPath;
|
---|
412 | pNtName->Length = (uint16_t)(cwcWinPath * sizeof(RTUTF16));
|
---|
413 | pNtName->MaximumLength = pNtName->Length + sizeof(RTUTF16);
|
---|
414 | *phRootDir = NULL;
|
---|
415 | return VINF_SUCCESS;
|
---|
416 | }
|
---|
417 | rc = VERR_NO_UTF16_MEMORY;
|
---|
418 | }
|
---|
419 | else
|
---|
420 | rc = VERR_FILENAME_TOO_LONG;
|
---|
421 | return rc;
|
---|
422 | }
|
---|
423 | #endif
|
---|
424 |
|
---|
425 | if ( pwszWinPath[2] == '?'
|
---|
426 | && cwcWinPath >= 4
|
---|
427 | && RTPATH_IS_SLASH(pwszWinPath[3]))
|
---|
428 | return rtNtPathFromWinUtf16PassThru(pNtName, phRootDir, pwszWinPath, cwcWinPath);
|
---|
429 |
|
---|
430 | if ( pwszWinPath[2] == '.'
|
---|
431 | && cwcWinPath >= 4
|
---|
432 | && RTPATH_IS_SLASH(pwszWinPath[3]))
|
---|
433 | {
|
---|
434 | /*
|
---|
435 | * Device path.
|
---|
436 | * Note! I suspect \\.\stuff\..\otherstuff may be handled differently by windows.
|
---|
437 | */
|
---|
438 | cchSkip = 4;
|
---|
439 | }
|
---|
440 | else
|
---|
441 | {
|
---|
442 | /* UNC */
|
---|
443 | pszPrefix = g_szPrefixUnc;
|
---|
444 | cchPrefix = sizeof(g_szPrefixUnc) - 1;
|
---|
445 | cchSkip = 2;
|
---|
446 | }
|
---|
447 | }
|
---|
448 |
|
---|
449 | /*
|
---|
450 | * Straighten out all .. and unnecessary . references and convert slashes.
|
---|
451 | */
|
---|
452 | /* UTF-16 -> UTF-8 (relative path) */
|
---|
453 | char szRelPath[RTPATH_MAX];
|
---|
454 | char *pszRelPathFree = NULL;
|
---|
455 | char *pszRelPath = szRelPath;
|
---|
456 | size_t cchRelPath;
|
---|
457 | rc = RTUtf16ToUtf8Ex(pwszWinPath, cwcWinPath, &pszRelPath, sizeof(szRelPath), &cchRelPath);
|
---|
458 | if (RT_SUCCESS(rc))
|
---|
459 | { /* likely */ }
|
---|
460 | else if (rc == VERR_BUFFER_OVERFLOW)
|
---|
461 | {
|
---|
462 | pszRelPath = NULL;
|
---|
463 | rc = RTUtf16ToUtf8Ex(pwszWinPath, cwcWinPath, &pszRelPath, 0, &cchRelPath);
|
---|
464 | if (RT_SUCCESS(rc))
|
---|
465 | pszRelPathFree = pszRelPath;
|
---|
466 | }
|
---|
467 | if (RT_SUCCESS(rc))
|
---|
468 | {
|
---|
469 | /* Relative -> Absolute. */
|
---|
470 | char szAbsPathBuf[RTPATH_MAX];
|
---|
471 | char *pszAbsPathFree = NULL;
|
---|
472 | char *pszAbsPath = szAbsPathBuf;
|
---|
473 | size_t cbAbsPath = sizeof(szAbsPathBuf) - (cchPrefix - cchSkip);
|
---|
474 | rc = RTPathAbsEx(NULL, szRelPath, RTPATH_STR_F_STYLE_DOS, &pszAbsPath[cchPrefix - cchSkip], &cbAbsPath);
|
---|
475 | if (RT_SUCCESS(rc))
|
---|
476 | { /* likely */ }
|
---|
477 | else if (rc == VERR_BUFFER_OVERFLOW)
|
---|
478 | {
|
---|
479 | unsigned cTries = 8;
|
---|
480 | size_t cbAbsPathBuf = RTPATH_MAX;
|
---|
481 | for (;;)
|
---|
482 | {
|
---|
483 | cbAbsPathBuf = RT_MAX(RT_ALIGN_Z((cchPrefix - cchSkip) + cbAbsPath + 32, 64), cbAbsPathBuf + 256);
|
---|
484 | if (cTries == 1)
|
---|
485 | cbAbsPathBuf = RT_MAX(cbAbsPathBuf, RTPATH_BIG_MAX * 2);
|
---|
486 | pszAbsPathFree = pszAbsPath = (char *)RTMemTmpAlloc(cbAbsPathBuf);
|
---|
487 | if (!pszAbsPath)
|
---|
488 | {
|
---|
489 | rc = VERR_NO_TMP_MEMORY;
|
---|
490 | break;
|
---|
491 | }
|
---|
492 |
|
---|
493 | cbAbsPath = cbAbsPathBuf - (cchPrefix - cchSkip);
|
---|
494 | rc = RTPathAbsEx(NULL, szRelPath, RTPATH_STR_F_STYLE_DOS, &pszAbsPath[cchPrefix - cchSkip], &cbAbsPath);
|
---|
495 | if (RT_SUCCESS(rc))
|
---|
496 | break;
|
---|
497 |
|
---|
498 | RTMemTmpFree(pszAbsPathFree);
|
---|
499 | pszAbsPathFree = NULL;
|
---|
500 | if (rc != VERR_BUFFER_OVERFLOW)
|
---|
501 | break;
|
---|
502 | if (--cTries == 0)
|
---|
503 | {
|
---|
504 | rc = VERR_FILENAME_TOO_LONG;
|
---|
505 | break;
|
---|
506 | }
|
---|
507 | }
|
---|
508 |
|
---|
509 | }
|
---|
510 | if (pszRelPathFree)
|
---|
511 | RTStrFree(pszRelPathFree);
|
---|
512 |
|
---|
513 | if (RT_SUCCESS(rc))
|
---|
514 | {
|
---|
515 | /*
|
---|
516 | * Add prefix
|
---|
517 | */
|
---|
518 | memcpy(pszAbsPath, pszPrefix, cchPrefix);
|
---|
519 |
|
---|
520 | /*
|
---|
521 | * Remove trailing '.' that is used to specify no extension in the Win32/DOS world.
|
---|
522 | */
|
---|
523 | size_t cchAbsPath = strlen(pszAbsPath);
|
---|
524 | if ( cchAbsPath > 2
|
---|
525 | && pszAbsPath[cchAbsPath - 1] == '.')
|
---|
526 | {
|
---|
527 | char const ch = pszAbsPath[cchAbsPath - 2];
|
---|
528 | if ( ch != '/'
|
---|
529 | && ch != '\\'
|
---|
530 | && ch != ':'
|
---|
531 | && ch != '.')
|
---|
532 | pszAbsPath[--cchAbsPath] = '\0';
|
---|
533 | }
|
---|
534 |
|
---|
535 | /*
|
---|
536 | * Finally convert to UNICODE_STRING.
|
---|
537 | */
|
---|
538 | rc = rtNtPathUtf8ToUniStr(pNtName, phRootDir, pszAbsPath);
|
---|
539 |
|
---|
540 | if (pszAbsPathFree)
|
---|
541 | RTMemTmpFree(pszAbsPathFree);
|
---|
542 | }
|
---|
543 | }
|
---|
544 | return rc;
|
---|
545 | }
|
---|
546 |
|
---|
547 |
|
---|
548 | /**
|
---|
549 | * Ensures that the NT string has sufficient storage to hold @a cwcMin RTUTF16
|
---|
550 | * chars plus a terminator.
|
---|
551 | *
|
---|
552 | * The NT string must have been returned by RTNtPathFromWinUtf8 or
|
---|
553 | * RTNtPathFromWinUtf16Ex.
|
---|
554 | *
|
---|
555 | * @returns IPRT status code.
|
---|
556 | * @param pNtName The NT path string.
|
---|
557 | * @param cwcMin The minimum number of RTUTF16 chars. Max 32767.
|
---|
558 | * @sa RTNtPathFree
|
---|
559 | */
|
---|
560 | RTDECL(int) RTNtPathEnsureSpace(struct _UNICODE_STRING *pNtName, size_t cwcMin)
|
---|
561 | {
|
---|
562 | if (pNtName->MaximumLength / sizeof(RTUTF16) > cwcMin)
|
---|
563 | return VINF_SUCCESS;
|
---|
564 |
|
---|
565 | AssertReturn(cwcMin < _64K / sizeof(RTUTF16), VERR_OUT_OF_RANGE);
|
---|
566 |
|
---|
567 | size_t const cbMin = (cwcMin + 1) * sizeof(RTUTF16);
|
---|
568 | int rc = RTUtf16Realloc(&pNtName->Buffer, cbMin);
|
---|
569 | if (RT_SUCCESS(rc))
|
---|
570 | pNtName->MaximumLength = (uint16_t)cbMin;
|
---|
571 | return rc;
|
---|
572 | }
|
---|
573 |
|
---|
574 |
|
---|
575 | /**
|
---|
576 | * Gets the NT path to the object represented by the given handle.
|
---|
577 | *
|
---|
578 | * @returns IPRT status code.
|
---|
579 | * @param pNtName Where to return the NT path. Free using
|
---|
580 | * RTNtPathFree.
|
---|
581 | * @param hHandle The handle.
|
---|
582 | * @param cwcExtra How much extra space is needed.
|
---|
583 | */
|
---|
584 | RTDECL(int) RTNtPathFromHandle(struct _UNICODE_STRING *pNtName, HANDLE hHandle, size_t cwcExtra)
|
---|
585 | {
|
---|
586 | /*
|
---|
587 | * Query the name into a buffer.
|
---|
588 | */
|
---|
589 | ULONG cbBuf = _2K;
|
---|
590 | PUNICODE_STRING pUniStrBuf = (PUNICODE_STRING)RTMemTmpAllocZ(cbBuf);
|
---|
591 | if (!pUniStrBuf)
|
---|
592 | return VERR_NO_TMP_MEMORY;
|
---|
593 |
|
---|
594 | ULONG cbNameBuf = cbBuf;
|
---|
595 | NTSTATUS rcNt = NtQueryObject(hHandle, ObjectNameInformation, pUniStrBuf, cbBuf, &cbNameBuf);
|
---|
596 | while ( rcNt == STATUS_BUFFER_OVERFLOW
|
---|
597 | || rcNt == STATUS_BUFFER_TOO_SMALL)
|
---|
598 | {
|
---|
599 | do
|
---|
600 | cbBuf *= 2;
|
---|
601 | while (cbBuf <= cbNameBuf);
|
---|
602 | RTMemTmpFree(pUniStrBuf);
|
---|
603 | pUniStrBuf = (PUNICODE_STRING)RTMemTmpAllocZ(cbBuf);
|
---|
604 | if (!pUniStrBuf)
|
---|
605 | return VERR_NO_TMP_MEMORY;
|
---|
606 |
|
---|
607 | cbNameBuf = cbBuf;
|
---|
608 | rcNt = NtQueryObject(hHandle, ObjectNameInformation, pUniStrBuf, cbBuf, &cbNameBuf);
|
---|
609 | }
|
---|
610 | int rc;
|
---|
611 | if (NT_SUCCESS(rcNt))
|
---|
612 | {
|
---|
613 | /*
|
---|
614 | * Copy the result into the return string.
|
---|
615 | */
|
---|
616 | size_t cbNeeded = cwcExtra * sizeof(RTUTF16) + pUniStrBuf->Length + sizeof(RTUTF16);
|
---|
617 | if (cbNeeded < _64K)
|
---|
618 | {
|
---|
619 | pNtName->Length = pUniStrBuf->Length;
|
---|
620 | pNtName->MaximumLength = (uint16_t)cbNeeded;
|
---|
621 | pNtName->Buffer = RTUtf16Alloc(cbNeeded);
|
---|
622 | if (pNtName->Buffer)
|
---|
623 | {
|
---|
624 | memcpy(pNtName->Buffer, pUniStrBuf->Buffer, pUniStrBuf->Length);
|
---|
625 | pNtName->Buffer[pUniStrBuf->Length / sizeof(RTUTF16)] = '\0';
|
---|
626 | rc = VINF_SUCCESS;
|
---|
627 | }
|
---|
628 | else
|
---|
629 | rc = VERR_NO_UTF16_MEMORY;
|
---|
630 | }
|
---|
631 | else
|
---|
632 | rc = VERR_FILENAME_TOO_LONG;
|
---|
633 | }
|
---|
634 | else
|
---|
635 | rc = RTErrConvertFromNtStatus(rcNt);
|
---|
636 | RTMemTmpFree(pUniStrBuf);
|
---|
637 | return rc;
|
---|
638 | }
|
---|
639 |
|
---|
640 | static int rtNtPathRelativeToAbs(struct _UNICODE_STRING *pNtName, HANDLE *phRootDir)
|
---|
641 | {
|
---|
642 | int rc;
|
---|
643 | if (pNtName->Length == 0)
|
---|
644 | {
|
---|
645 | RTUtf16Free(pNtName->Buffer);
|
---|
646 | rc = RTNtPathFromHandle(pNtName, *phRootDir, pNtName->Length / sizeof(RTUTF16) + 2);
|
---|
647 | if (RT_SUCCESS(rc))
|
---|
648 | {
|
---|
649 | *phRootDir = NULL;
|
---|
650 | return VINF_SUCCESS;
|
---|
651 | }
|
---|
652 | }
|
---|
653 | else
|
---|
654 | {
|
---|
655 |
|
---|
656 | UNICODE_STRING RootDir;
|
---|
657 | size_t const cwcAppend = pNtName->Length / sizeof(RTUTF16);
|
---|
658 | rc = RTNtPathFromHandle(&RootDir, *phRootDir, cwcAppend + 2);
|
---|
659 | if (RT_SUCCESS(rc))
|
---|
660 | {
|
---|
661 | size_t cwcRoot = RootDir.Length / sizeof(RTUTF16);
|
---|
662 | if (RootDir.Buffer[cwcRoot - 1] != '\\')
|
---|
663 | RootDir.Buffer[cwcRoot++] = '\\';
|
---|
664 | memcpy(&RootDir.Buffer[cwcRoot], pNtName->Buffer, cwcAppend * sizeof(RTUTF16));
|
---|
665 | RTUtf16Free(pNtName->Buffer);
|
---|
666 | pNtName->Length = (uint16_t)((cwcRoot + cwcAppend) * sizeof(RTUTF16));
|
---|
667 | pNtName->MaximumLength = RootDir.MaximumLength;
|
---|
668 | pNtName->Buffer = RootDir.Buffer;
|
---|
669 |
|
---|
670 | *phRootDir = NULL;
|
---|
671 | return VINF_SUCCESS;
|
---|
672 | }
|
---|
673 | RTUtf16Free(pNtName->Buffer);
|
---|
674 | }
|
---|
675 | pNtName->Length = 0;
|
---|
676 | pNtName->MaximumLength = 0;
|
---|
677 | pNtName->Buffer = NULL;
|
---|
678 | return rc;
|
---|
679 | }
|
---|
680 |
|
---|
681 |
|
---|
682 | /**
|
---|
683 | * Rewinds the path back to the start of the previous component.
|
---|
684 | *
|
---|
685 | * Will preserve root slash.
|
---|
686 | *
|
---|
687 | * @returns Pointer to character after the start-of-component slash, or
|
---|
688 | * pwszStart.
|
---|
689 | * @param pwcEnd The current end of the path.
|
---|
690 | * @param pwszStart The start of the path.
|
---|
691 | */
|
---|
692 | static PRTUTF16 rtNtPathGetPrevComponent(PRTUTF16 pwcEnd, PRTUTF16 pwszStart)
|
---|
693 | {
|
---|
694 | if ((uintptr_t)pwcEnd > (uintptr_t)pwszStart)
|
---|
695 | {
|
---|
696 | RTUTF16 wc = pwcEnd[-1];
|
---|
697 | if ( (wc == '\\' || wc == '/')
|
---|
698 | && (uintptr_t)(pwcEnd - pwszStart) != 1)
|
---|
699 | pwcEnd--;
|
---|
700 |
|
---|
701 | while ( (uintptr_t)pwcEnd > (uintptr_t)pwszStart
|
---|
702 | && (wc = pwcEnd[-1]) != '\\'
|
---|
703 | && (wc = pwcEnd[-1]) != '/')
|
---|
704 | pwcEnd--;
|
---|
705 | }
|
---|
706 | return pwcEnd;
|
---|
707 | }
|
---|
708 |
|
---|
709 |
|
---|
710 | /**
|
---|
711 | * Converts a relative windows-style path to relative NT format and encoding.
|
---|
712 | *
|
---|
713 | * @returns IPRT status code.
|
---|
714 | * @param pNtName Where to return the NT name. Free using
|
---|
715 | * rtTNtPathToNative with phRootDir set to NULL.
|
---|
716 | * @param phRootDir On input, the handle to the directory the path
|
---|
717 | * is relative to. On output, the handle to
|
---|
718 | * specify as root directory in the object
|
---|
719 | * attributes when accessing the path. If
|
---|
720 | * enmAscent is kRTNtPathRelativeAscent_Allow, it
|
---|
721 | * may have been set to NULL.
|
---|
722 | * @param pszPath The relative UTF-8 path.
|
---|
723 | * @param enmAscent How to handle ascent.
|
---|
724 | * @param fMustReturnAbsolute Must convert to an absolute path. This
|
---|
725 | * is necessary if the root dir is a NT directory
|
---|
726 | * object (e.g. /Devices) since they cannot parse
|
---|
727 | * relative paths it seems.
|
---|
728 | */
|
---|
729 | RTDECL(int) RTNtPathRelativeFromUtf8(struct _UNICODE_STRING *pNtName, PHANDLE phRootDir, const char *pszPath,
|
---|
730 | RTNTPATHRELATIVEASCENT enmAscent, bool fMustReturnAbsolute)
|
---|
731 | {
|
---|
732 | size_t cwcMax;
|
---|
733 | int rc = RTStrCalcUtf16LenEx(pszPath, RTSTR_MAX, &cwcMax);
|
---|
734 | if (RT_FAILURE(rc))
|
---|
735 | return rc;
|
---|
736 | if (cwcMax + 2 >= _32K)
|
---|
737 | return VERR_FILENAME_TOO_LONG;
|
---|
738 |
|
---|
739 | PRTUTF16 pwszDst;
|
---|
740 | pNtName->Length = 0;
|
---|
741 | pNtName->MaximumLength = (uint16_t)((cwcMax + 2) * sizeof(RTUTF16));
|
---|
742 | pNtName->Buffer = pwszDst = RTUtf16Alloc((cwcMax + 2) * sizeof(RTUTF16));
|
---|
743 | if (!pwszDst)
|
---|
744 | return VERR_NO_UTF16_MEMORY;
|
---|
745 |
|
---|
746 | PRTUTF16 pwszDstCur = pwszDst;
|
---|
747 | PRTUTF16 pwszDstComp = pwszDst;
|
---|
748 | for (;;)
|
---|
749 | {
|
---|
750 | RTUNICP uc;
|
---|
751 | rc = RTStrGetCpEx(&pszPath, &uc);
|
---|
752 | if (RT_SUCCESS(rc))
|
---|
753 | {
|
---|
754 | switch (uc)
|
---|
755 | {
|
---|
756 | default:
|
---|
757 | pwszDstCur = RTUtf16PutCp(pwszDstCur, uc);
|
---|
758 | break;
|
---|
759 |
|
---|
760 | case '\\':
|
---|
761 | case '/':
|
---|
762 | if (pwszDstCur != pwszDstComp)
|
---|
763 | pwszDstComp = pwszDstCur = RTUtf16PutCp(pwszDstCur, '\\');
|
---|
764 | /* else: only one slash between components. */
|
---|
765 | break;
|
---|
766 |
|
---|
767 | case '.':
|
---|
768 | if (pwszDstCur == pwszDstComp)
|
---|
769 | {
|
---|
770 | /*
|
---|
771 | * Single dot changes nothing.
|
---|
772 | */
|
---|
773 | char ch2 = *pszPath;
|
---|
774 | if (ch2 == '\0')
|
---|
775 | {
|
---|
776 | /* Trailing single dot means we need to drop trailing slash. */
|
---|
777 | if (pwszDstCur != pwszDst)
|
---|
778 | pwszDstCur--;
|
---|
779 | *pwszDstCur = '\0';
|
---|
780 | pNtName->Length = (uint16_t)((uintptr_t)pwszDstCur - (uintptr_t)pwszDst);
|
---|
781 | if (!fMustReturnAbsolute || *phRootDir == NULL)
|
---|
782 | return VINF_SUCCESS;
|
---|
783 | return rtNtPathRelativeToAbs(pNtName, phRootDir);
|
---|
784 | }
|
---|
785 |
|
---|
786 | if (ch2 == '\\' || ch2 == '/')
|
---|
787 | {
|
---|
788 | pszPath++; /* Ignore lone dot followed but another component. */
|
---|
789 | break;
|
---|
790 | }
|
---|
791 |
|
---|
792 | /*
|
---|
793 | * Two dots drops off the last directory component. This gets complicated
|
---|
794 | * when we start out without any path and we need to consult enmAscent.
|
---|
795 | */
|
---|
796 | if (ch2 == '.')
|
---|
797 | {
|
---|
798 | char ch3 = pszPath[1];
|
---|
799 | if ( ch3 == '\\'
|
---|
800 | || ch3 == '/'
|
---|
801 | || ch3 == '\0')
|
---|
802 | {
|
---|
803 | /* Drop a path component. */
|
---|
804 | if (pwszDstComp != pwszDst)
|
---|
805 | pwszDstComp = pwszDstCur = rtNtPathGetPrevComponent(pwszDstCur, pwszDst);
|
---|
806 | /* Hit the start, which is a bit complicated. */
|
---|
807 | else
|
---|
808 | switch (enmAscent)
|
---|
809 | {
|
---|
810 | case kRTNtPathRelativeAscent_Allow:
|
---|
811 | if (*phRootDir != NULL)
|
---|
812 | {
|
---|
813 | RTUtf16Free(pwszDst);
|
---|
814 | rc = RTNtPathFromHandle(pNtName, *phRootDir, cwcMax + 2);
|
---|
815 | if (RT_FAILURE(rc))
|
---|
816 | return rc;
|
---|
817 |
|
---|
818 | *phRootDir = NULL;
|
---|
819 | pwszDst = pNtName->Buffer;
|
---|
820 | pwszDstCur = &pwszDst[pNtName->Length / sizeof(RTUTF16)];
|
---|
821 | if ( pwszDst != pwszDstCur
|
---|
822 | && pwszDstCur[-1] != '\\'
|
---|
823 | && pwszDstCur[-1] != '/')
|
---|
824 | *pwszDstCur++ = '\\';
|
---|
825 | pwszDstComp = pwszDstCur = rtNtPathGetPrevComponent(pwszDstCur, pwszDst);
|
---|
826 | }
|
---|
827 | /* else: ignore attempt to ascend beyond the NT root (won't get here). */
|
---|
828 | break;
|
---|
829 |
|
---|
830 | case kRTNtPathRelativeAscent_Ignore:
|
---|
831 | /* nothing to do here */
|
---|
832 | break;
|
---|
833 |
|
---|
834 | default:
|
---|
835 | case kRTNtPathRelativeAscent_Fail:
|
---|
836 | RTUtf16Free(pwszDst);
|
---|
837 | return VERR_PATH_NOT_FOUND;
|
---|
838 | }
|
---|
839 |
|
---|
840 | if (ch3 == '\0')
|
---|
841 | {
|
---|
842 | *pwszDstCur = '\0';
|
---|
843 | pNtName->Length = (uint16_t)((uintptr_t)pwszDstCur - (uintptr_t)pwszDst);
|
---|
844 | if (!fMustReturnAbsolute || *phRootDir == NULL)
|
---|
845 | return VINF_SUCCESS;
|
---|
846 | return rtNtPathRelativeToAbs(pNtName, phRootDir);
|
---|
847 | }
|
---|
848 | pszPath += 2;
|
---|
849 | break;
|
---|
850 | }
|
---|
851 | }
|
---|
852 | }
|
---|
853 |
|
---|
854 | /* Neither '.' nor '..'. */
|
---|
855 | pwszDstCur = RTUtf16PutCp(pwszDstCur, '.');
|
---|
856 | break;
|
---|
857 |
|
---|
858 | case '\0':
|
---|
859 | *pwszDstCur = '\0';
|
---|
860 | pNtName->Length = (uint16_t)((uintptr_t)pwszDstCur - (uintptr_t)pwszDst);
|
---|
861 | if (!fMustReturnAbsolute || *phRootDir == NULL)
|
---|
862 | return VINF_SUCCESS;
|
---|
863 | return rtNtPathRelativeToAbs(pNtName, phRootDir);
|
---|
864 | }
|
---|
865 | }
|
---|
866 | }
|
---|
867 | }
|
---|
868 |
|
---|
869 |
|
---|
870 | /**
|
---|
871 | * Frees the native path and root handle.
|
---|
872 | *
|
---|
873 | * @param pNtName The NT path after a successful rtNtPathToNative
|
---|
874 | * call or RTNtPathRelativeFromUtf8.
|
---|
875 | * @param phRootDir The root handle variable from rtNtPathToNative,
|
---|
876 | * but NOT RTNtPathRelativeFromUtf8.
|
---|
877 | */
|
---|
878 | static void rtNtPathFreeNative(struct _UNICODE_STRING *pNtName, PHANDLE phRootDir)
|
---|
879 | {
|
---|
880 | RTUtf16Free(pNtName->Buffer);
|
---|
881 | pNtName->Buffer = NULL;
|
---|
882 |
|
---|
883 | RT_NOREF_PV(phRootDir); /* never returned by rtNtPathToNative, shouldn't be freed in connection with RTNtPathRelativeFromUtf8 */
|
---|
884 | }
|
---|
885 |
|
---|
886 |
|
---|
887 | /**
|
---|
888 | * Frees the native path and root handle.
|
---|
889 | *
|
---|
890 | * @param pNtName The NT path after a successful rtNtPathToNative
|
---|
891 | * call or RTNtPathRelativeFromUtf8.
|
---|
892 | * @param phRootDir The root handle variable from rtNtPathToNative,
|
---|
893 | */
|
---|
894 | RTDECL(void) RTNtPathFree(struct _UNICODE_STRING *pNtName, HANDLE *phRootDir)
|
---|
895 | {
|
---|
896 | rtNtPathFreeNative(pNtName, phRootDir);
|
---|
897 | }
|
---|
898 |
|
---|
899 |
|
---|
900 | /**
|
---|
901 | * Wrapper around NtCreateFile.
|
---|
902 | *
|
---|
903 | * @returns IPRT status code.
|
---|
904 | * @param pszPath The UTF-8 path.
|
---|
905 | * @param fDesiredAccess See NtCreateFile.
|
---|
906 | * @param fFileAttribs See NtCreateFile.
|
---|
907 | * @param fShareAccess See NtCreateFile.
|
---|
908 | * @param fCreateDisposition See NtCreateFile.
|
---|
909 | * @param fCreateOptions See NtCreateFile.
|
---|
910 | * @param fObjAttribs The OBJECT_ATTRIBUTES::Attributes value, see
|
---|
911 | * NtCreateFile and InitializeObjectAttributes.
|
---|
912 | * @param phHandle Where to return the handle.
|
---|
913 | * @param puAction Where to return the action taken. Optional.
|
---|
914 | */
|
---|
915 | RTDECL(int) RTNtPathOpen(const char *pszPath, ACCESS_MASK fDesiredAccess, ULONG fFileAttribs, ULONG fShareAccess,
|
---|
916 | ULONG fCreateDisposition, ULONG fCreateOptions, ULONG fObjAttribs,
|
---|
917 | PHANDLE phHandle, PULONG_PTR puAction)
|
---|
918 | {
|
---|
919 | *phHandle = RTNT_INVALID_HANDLE_VALUE;
|
---|
920 |
|
---|
921 | HANDLE hRootDir;
|
---|
922 | UNICODE_STRING NtName;
|
---|
923 | int rc = rtNtPathToNative(&NtName, &hRootDir, pszPath);
|
---|
924 | if (RT_SUCCESS(rc))
|
---|
925 | {
|
---|
926 | HANDLE hFile = RTNT_INVALID_HANDLE_VALUE;
|
---|
927 | IO_STATUS_BLOCK Ios = RTNT_IO_STATUS_BLOCK_INITIALIZER;
|
---|
928 | OBJECT_ATTRIBUTES ObjAttr;
|
---|
929 | InitializeObjectAttributes(&ObjAttr, &NtName, fObjAttribs, hRootDir, NULL);
|
---|
930 |
|
---|
931 | NTSTATUS rcNt = NtCreateFile(&hFile,
|
---|
932 | fDesiredAccess,
|
---|
933 | &ObjAttr,
|
---|
934 | &Ios,
|
---|
935 | NULL /* AllocationSize*/,
|
---|
936 | fFileAttribs,
|
---|
937 | fShareAccess,
|
---|
938 | fCreateDisposition,
|
---|
939 | fCreateOptions,
|
---|
940 | NULL /*EaBuffer*/,
|
---|
941 | 0 /*EaLength*/);
|
---|
942 | if (NT_SUCCESS(rcNt))
|
---|
943 | {
|
---|
944 | if (puAction)
|
---|
945 | *puAction = Ios.Information;
|
---|
946 | *phHandle = hFile;
|
---|
947 | rc = VINF_SUCCESS;
|
---|
948 | }
|
---|
949 | else
|
---|
950 | rc = RTErrConvertFromNtStatus(rcNt);
|
---|
951 | rtNtPathFreeNative(&NtName, &hRootDir);
|
---|
952 | }
|
---|
953 | return rc;
|
---|
954 | }
|
---|
955 |
|
---|
956 |
|
---|
957 | /**
|
---|
958 | * Wrapper around NtCreateFile.
|
---|
959 | *
|
---|
960 | * @returns IPRT status code.
|
---|
961 | * @param pszPath The UTF-8 path.
|
---|
962 | * @param fDesiredAccess See NtCreateFile.
|
---|
963 | * @param fShareAccess See NtCreateFile.
|
---|
964 | * @param fCreateOptions See NtCreateFile.
|
---|
965 | * @param fObjAttribs The OBJECT_ATTRIBUTES::Attributes value, see
|
---|
966 | * NtCreateFile and InitializeObjectAttributes.
|
---|
967 | * @param phHandle Where to return the handle.
|
---|
968 | * @param pfObjDir If not NULL, the variable pointed to will be set
|
---|
969 | * to @c true if we opened an object directory and
|
---|
970 | * @c false if we opened an directory file (normal
|
---|
971 | * directory).
|
---|
972 | */
|
---|
973 | RTDECL(int) RTNtPathOpenDir(const char *pszPath, ACCESS_MASK fDesiredAccess, ULONG fShareAccess, ULONG fCreateOptions,
|
---|
974 | ULONG fObjAttribs, PHANDLE phHandle, bool *pfObjDir)
|
---|
975 | {
|
---|
976 | *phHandle = RTNT_INVALID_HANDLE_VALUE;
|
---|
977 |
|
---|
978 | HANDLE hRootDir;
|
---|
979 | UNICODE_STRING NtName;
|
---|
980 | int rc = rtNtPathToNative(&NtName, &hRootDir, pszPath);
|
---|
981 | if (RT_SUCCESS(rc))
|
---|
982 | {
|
---|
983 | if (pfObjDir)
|
---|
984 | {
|
---|
985 | *pfObjDir = false;
|
---|
986 | #ifdef IPRT_WITH_NT_PATH_PASSTHRU
|
---|
987 | if ( !RTPATH_IS_SLASH(pszPath[0])
|
---|
988 | || !RTPATH_IS_SLASH(pszPath[1])
|
---|
989 | || pszPath[2] != ':'
|
---|
990 | || pszPath[3] != 'i'
|
---|
991 | || pszPath[4] != 'p'
|
---|
992 | || pszPath[5] != 'r'
|
---|
993 | || pszPath[6] != 't'
|
---|
994 | || pszPath[7] != 'n'
|
---|
995 | || pszPath[8] != 't'
|
---|
996 | || pszPath[9] != ':'
|
---|
997 | || !RTPATH_IS_SLASH(pszPath[10]) )
|
---|
998 | #endif
|
---|
999 | pfObjDir = NULL;
|
---|
1000 | }
|
---|
1001 | rc = RTNtPathOpenDirEx(hRootDir, &NtName, fDesiredAccess, fShareAccess, fCreateOptions, fObjAttribs, phHandle, pfObjDir);
|
---|
1002 | rtNtPathFreeNative(&NtName, &hRootDir);
|
---|
1003 | }
|
---|
1004 | return rc;
|
---|
1005 | }
|
---|
1006 |
|
---|
1007 |
|
---|
1008 |
|
---|
1009 | /**
|
---|
1010 | * Wrapper around NtCreateFile, extended version.
|
---|
1011 | *
|
---|
1012 | * @returns IPRT status code.
|
---|
1013 | * @param hRootDir The root director the path is relative to. NULL
|
---|
1014 | * if none.
|
---|
1015 | * @param pNtName The NT path.
|
---|
1016 | * @param fDesiredAccess See NtCreateFile.
|
---|
1017 | * @param fShareAccess See NtCreateFile.
|
---|
1018 | * @param fCreateOptions See NtCreateFile.
|
---|
1019 | * @param fObjAttribs The OBJECT_ATTRIBUTES::Attributes value, see
|
---|
1020 | * NtCreateFile and InitializeObjectAttributes.
|
---|
1021 | * @param phHandle Where to return the handle.
|
---|
1022 | * @param pfObjDir If not NULL, the variable pointed to will be set
|
---|
1023 | * to @c true if we opened an object directory and
|
---|
1024 | * @c false if we opened an directory file (normal
|
---|
1025 | * directory).
|
---|
1026 | */
|
---|
1027 | RTDECL(int) RTNtPathOpenDirEx(HANDLE hRootDir, struct _UNICODE_STRING *pNtName, ACCESS_MASK fDesiredAccess, ULONG fShareAccess,
|
---|
1028 | ULONG fCreateOptions, ULONG fObjAttribs, PHANDLE phHandle, bool *pfObjDir)
|
---|
1029 | {
|
---|
1030 | *phHandle = RTNT_INVALID_HANDLE_VALUE;
|
---|
1031 |
|
---|
1032 | HANDLE hFile = RTNT_INVALID_HANDLE_VALUE;
|
---|
1033 | IO_STATUS_BLOCK Ios = RTNT_IO_STATUS_BLOCK_INITIALIZER;
|
---|
1034 | OBJECT_ATTRIBUTES ObjAttr;
|
---|
1035 | InitializeObjectAttributes(&ObjAttr, pNtName, fObjAttribs, hRootDir, NULL);
|
---|
1036 |
|
---|
1037 | NTSTATUS rcNt = NtCreateFile(&hFile,
|
---|
1038 | fDesiredAccess,
|
---|
1039 | &ObjAttr,
|
---|
1040 | &Ios,
|
---|
1041 | NULL /* AllocationSize*/,
|
---|
1042 | FILE_ATTRIBUTE_NORMAL,
|
---|
1043 | fShareAccess,
|
---|
1044 | FILE_OPEN,
|
---|
1045 | fCreateOptions,
|
---|
1046 | NULL /*EaBuffer*/,
|
---|
1047 | 0 /*EaLength*/);
|
---|
1048 | if (NT_SUCCESS(rcNt))
|
---|
1049 | {
|
---|
1050 | if (pfObjDir)
|
---|
1051 | *pfObjDir = false;
|
---|
1052 | *phHandle = hFile;
|
---|
1053 | return VINF_SUCCESS;
|
---|
1054 | }
|
---|
1055 |
|
---|
1056 | /*
|
---|
1057 | * Try add a slash in case this is a device object with a file system attached.
|
---|
1058 | */
|
---|
1059 | if ( rcNt == STATUS_INVALID_PARAMETER
|
---|
1060 | && pNtName->Length < _64K - 4
|
---|
1061 | && ( pNtName->Length == 0
|
---|
1062 | || pNtName->Buffer[pNtName->Length / sizeof(RTUTF16)] != '\\') )
|
---|
1063 | {
|
---|
1064 | UNICODE_STRING NtTmp;
|
---|
1065 | NtTmp.Length = pNtName->Length + 2;
|
---|
1066 | NtTmp.MaximumLength = NtTmp.Length + 2;
|
---|
1067 | NtTmp.Buffer = (PRTUTF16)RTMemTmpAlloc(NtTmp.MaximumLength);
|
---|
1068 | if (NtTmp.Buffer)
|
---|
1069 | {
|
---|
1070 | memcpy(NtTmp.Buffer, pNtName->Buffer, pNtName->Length);
|
---|
1071 | NtTmp.Buffer[pNtName->Length / sizeof(RTUTF16)] = '\\';
|
---|
1072 | NtTmp.Buffer[pNtName->Length / sizeof(RTUTF16) + 1] = '\0';
|
---|
1073 |
|
---|
1074 | hFile = RTNT_INVALID_HANDLE_VALUE;
|
---|
1075 | Ios.Status = -1;
|
---|
1076 | Ios.Information = 0;
|
---|
1077 | ObjAttr.ObjectName = &NtTmp;
|
---|
1078 |
|
---|
1079 | rcNt = NtCreateFile(&hFile,
|
---|
1080 | fDesiredAccess,
|
---|
1081 | &ObjAttr,
|
---|
1082 | &Ios,
|
---|
1083 | NULL /* AllocationSize*/,
|
---|
1084 | FILE_ATTRIBUTE_NORMAL,
|
---|
1085 | fShareAccess,
|
---|
1086 | FILE_OPEN,
|
---|
1087 | fCreateOptions,
|
---|
1088 | NULL /*EaBuffer*/,
|
---|
1089 | 0 /*EaLength*/);
|
---|
1090 | RTMemTmpFree(NtTmp.Buffer);
|
---|
1091 | if (NT_SUCCESS(rcNt))
|
---|
1092 | {
|
---|
1093 | if (pfObjDir)
|
---|
1094 | *pfObjDir = false;
|
---|
1095 | *phHandle = hFile;
|
---|
1096 | return VINF_SUCCESS;
|
---|
1097 | }
|
---|
1098 | ObjAttr.ObjectName = pNtName;
|
---|
1099 | }
|
---|
1100 | }
|
---|
1101 |
|
---|
1102 | /*
|
---|
1103 | * Try open it as a directory object if it makes sense.
|
---|
1104 | */
|
---|
1105 | if ( pfObjDir
|
---|
1106 | && ( rcNt == STATUS_OBJECT_NAME_INVALID
|
---|
1107 | || rcNt == STATUS_OBJECT_TYPE_MISMATCH ))
|
---|
1108 | {
|
---|
1109 | /* Strip trailing slash. */
|
---|
1110 | struct _UNICODE_STRING NtName2 = *pNtName;
|
---|
1111 | if ( NtName2.Length > 2
|
---|
1112 | && RTPATH_IS_SLASH(NtName2.Buffer[(NtName2.Length / 2) - 1]))
|
---|
1113 | NtName2.Length -= 2;
|
---|
1114 | ObjAttr.ObjectName = &NtName2;
|
---|
1115 |
|
---|
1116 | /* Rought conversion of the access flags. */
|
---|
1117 | ULONG fObjDesiredAccess = 0;
|
---|
1118 | if ( (fDesiredAccess & GENERIC_ALL)
|
---|
1119 | || (fDesiredAccess & STANDARD_RIGHTS_ALL) == STANDARD_RIGHTS_ALL)
|
---|
1120 | fObjDesiredAccess = DIRECTORY_ALL_ACCESS;
|
---|
1121 | else
|
---|
1122 | {
|
---|
1123 | if (fDesiredAccess & (GENERIC_WRITE | STANDARD_RIGHTS_WRITE | FILE_WRITE_DATA))
|
---|
1124 | fObjDesiredAccess |= DIRECTORY_CREATE_OBJECT | DIRECTORY_CREATE_OBJECT | DIRECTORY_CREATE_SUBDIRECTORY;
|
---|
1125 |
|
---|
1126 | if ( (fDesiredAccess & (GENERIC_READ | STANDARD_RIGHTS_READ | FILE_LIST_DIRECTORY))
|
---|
1127 | || !fObjDesiredAccess)
|
---|
1128 | fObjDesiredAccess |= DIRECTORY_QUERY;
|
---|
1129 |
|
---|
1130 | if (fDesiredAccess & FILE_TRAVERSE)
|
---|
1131 | fObjDesiredAccess |= DIRECTORY_TRAVERSE;
|
---|
1132 | }
|
---|
1133 |
|
---|
1134 | rcNt = NtOpenDirectoryObject(&hFile, fObjDesiredAccess, &ObjAttr);
|
---|
1135 | if (NT_SUCCESS(rcNt))
|
---|
1136 | {
|
---|
1137 | *pfObjDir = true;
|
---|
1138 | *phHandle = hFile;
|
---|
1139 | return VINF_SUCCESS;
|
---|
1140 | }
|
---|
1141 | }
|
---|
1142 |
|
---|
1143 | return RTErrConvertFromNtStatus(rcNt);
|
---|
1144 | }
|
---|
1145 |
|
---|
1146 |
|
---|
1147 |
|
---|
1148 | /**
|
---|
1149 | * Closes an handled open by rtNtPathOpen.
|
---|
1150 | *
|
---|
1151 | * @returns IPRT status code
|
---|
1152 | * @param hHandle The handle value.
|
---|
1153 | */
|
---|
1154 | RTDECL(int) RTNtPathClose(HANDLE hHandle)
|
---|
1155 | {
|
---|
1156 | NTSTATUS rcNt = NtClose(hHandle);
|
---|
1157 | if (NT_SUCCESS(rcNt))
|
---|
1158 | return VINF_SUCCESS;
|
---|
1159 | return RTErrConvertFromNtStatus(rcNt);
|
---|
1160 | }
|
---|
1161 |
|
---|