/* $Id$ */ /** @file * IPRT - Directory relative base APIs, NT implementation */ /* * Copyright (C) 2006-2023 Oracle and/or its affiliates. * * This file is part of VirtualBox base platform packages, as * available from https://www.virtualbox.org. * * This program is free software; you can redistribute it and/or * modify it under the terms of the GNU General Public License * as published by the Free Software Foundation, in version 3 of the * License. * * This program is distributed in the hope that it will be useful, but * WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU * General Public License for more details. * * You should have received a copy of the GNU General Public License * along with this program; if not, see . * * The contents of this file may alternatively be used under the terms * of the Common Development and Distribution License Version 1.0 * (CDDL), a copy of it is provided in the "COPYING.CDDL" file included * in the VirtualBox distribution, in which case the provisions of the * CDDL are applicable instead of those of the GPL. * * You may elect to license modified versions of this file under the * terms and conditions of either the GPL or the CDDL or both. * * SPDX-License-Identifier: GPL-3.0-only OR CDDL-1.0 */ /********************************************************************************************************************************* * Header Files * *********************************************************************************************************************************/ #define LOG_GROUP RTLOGGROUP_DIR #include #include "internal-r3-nt.h" #include #include #include #include #include #include #include #include "internal/dir.h" #include "internal/file.h" #include "internal/fs.h" #include "internal/path.h" /********************************************************************************************************************************* * Defined Constants And Macros * *********************************************************************************************************************************/ /** Getst the RTNTPATHRELATIVEASCENT value for RTNtPathRelativeFromUtf8. */ #define RTDIRREL_NT_GET_ASCENT(a_pThis) \ ( !(pThis->fFlags & RTDIR_F_DENY_ASCENT) ? kRTNtPathRelativeAscent_Allow : kRTNtPathRelativeAscent_Fail ) /** * Helper that builds a full path for a directory relative path. * * @returns IPRT status code. * @param pThis The directory. * @param pszPathDst The destination buffer. * @param cbPathDst The size of the destination buffer. * @param pszRelPath The relative path. */ static int rtDirRelBuildFullPath(PRTDIRINTERNAL pThis, char *pszPathDst, size_t cbPathDst, const char *pszRelPath) { AssertMsgReturn(!RTPathStartsWithRoot(pszRelPath), ("pszRelPath='%s'\n", pszRelPath), VERR_PATH_IS_NOT_RELATIVE); /* * Let's hope we can avoid checking for ascension. * * Note! We don't take symbolic links into account here. That can be * done later if desired. */ if ( !(pThis->fFlags & RTDIR_F_DENY_ASCENT) || strstr(pszRelPath, "..") == NULL) { size_t const cchRelPath = strlen(pszRelPath); size_t const cchDirPath = pThis->cchPath; if (cchDirPath + cchRelPath < cbPathDst) { memcpy(pszPathDst, pThis->pszPath, cchDirPath); memcpy(&pszPathDst[cchDirPath], pszRelPath, cchRelPath); pszPathDst[cchDirPath + cchRelPath] = '\0'; return VINF_SUCCESS; } return VERR_FILENAME_TOO_LONG; } /* * Calc the absolute path using the directory as a base, then check if the result * still starts with the full directory path. * * This ASSUMES that pThis->pszPath is an absolute path. */ int rc = RTPathAbsEx(pThis->pszPath, pszRelPath, RTPATH_STR_F_STYLE_HOST, pszPathDst, &cbPathDst); if (RT_SUCCESS(rc)) { if (RTPathStartsWith(pszPathDst, pThis->pszPath)) return VINF_SUCCESS; return VERR_PATH_NOT_FOUND; } return rc; } /* * * * RTFile stuff. * RTFile stuff. * RTFile stuff. * * */ RTDECL(int) RTDirRelFileOpen(RTDIR hDir, const char *pszRelFilename, uint64_t fOpen, PRTFILE phFile) { PRTDIRINTERNAL pThis = hDir; AssertPtrReturn(pThis, VERR_INVALID_HANDLE); AssertReturn(pThis->u32Magic == RTDIR_MAGIC, VERR_INVALID_HANDLE); /* * Validate and convert flags. */ uint32_t fDesiredAccess; uint32_t fObjAttribs; uint32_t fFileAttribs; uint32_t fShareAccess; uint32_t fCreateDisposition; uint32_t fCreateOptions; int rc = rtFileNtValidateAndConvertFlags(fOpen, &fDesiredAccess, &fObjAttribs, &fFileAttribs, &fShareAccess, &fCreateDisposition, &fCreateOptions); if (RT_SUCCESS(rc)) { /* * Convert and normalize the path. */ UNICODE_STRING NtName; HANDLE hRoot = pThis->hDir; rc = RTNtPathRelativeFromUtf8(&NtName, &hRoot, pszRelFilename, RTDIRREL_NT_GET_ASCENT(pThis), pThis->enmInfoClass == FileMaximumInformation); if (RT_SUCCESS(rc)) { HANDLE hFile = RTNT_INVALID_HANDLE_VALUE; IO_STATUS_BLOCK Ios = RTNT_IO_STATUS_BLOCK_INITIALIZER; OBJECT_ATTRIBUTES ObjAttr; InitializeObjectAttributes(&ObjAttr, &NtName, fObjAttribs, hRoot, NULL /*pSecDesc*/); NTSTATUS rcNt = NtCreateFile(&hFile, fDesiredAccess, &ObjAttr, &Ios, NULL /* AllocationSize*/, fFileAttribs, fShareAccess, fCreateDisposition, fCreateOptions, NULL /*EaBuffer*/, 0 /*EaLength*/); if (NT_SUCCESS(rcNt)) { rc = RTFileFromNative(phFile, (uintptr_t)hFile); if (RT_FAILURE(rc)) NtClose(hFile); } else rc = RTErrConvertFromNtStatus(rcNt); RTNtPathFree(&NtName, NULL); } } return rc; } /* * * * RTDir stuff. * RTDir stuff. * RTDir stuff. * * */ /** * Helper for cooking up a path string for rtDirOpenRelativeOrHandle. * * @returns IPRT status code. * @param pszDst The destination buffer. * @param cbDst The size of the destination buffer. * @param pThis The directory this is relative to. * @param pNtPath The NT path with a possibly relative path. * @param fRelative Whether @a pNtPath is relative or not. * @param pszPath The input path. */ static int rtDirRelJoinPathForDirOpen(char *pszDst, size_t cbDst, PRTDIRINTERNAL pThis, PUNICODE_STRING pNtPath, bool fRelative, const char *pszPath) { int rc; if (fRelative) { size_t cchRel = 0; rc = RTUtf16CalcUtf8LenEx(pNtPath->Buffer, pNtPath->Length / sizeof(RTUTF16), &cchRel); AssertRC(rc); if (RT_SUCCESS(rc)) { if (pThis->cchPath + cchRel < cbDst) { size_t cchBase = pThis->cchPath; memcpy(pszDst, pThis->pszPath, cchBase); pszDst += cchBase; cbDst -= cchBase; rc = RTUtf16ToUtf8Ex(pNtPath->Buffer, pNtPath->Length / sizeof(RTUTF16), &pszDst, cbDst, NULL); } else rc = VERR_FILENAME_TOO_LONG; } } else { /** @todo would be better to convert pNtName to DOS/WIN path here, * as it is absolute and doesn't need stuff resolved. */ rc = RTPathJoin(pszDst, cbDst, pThis->pszPath, pszPath); } return rc; } RTDECL(int) RTDirRelDirOpen(RTDIR hDir, const char *pszDir, RTDIR *phDir) { return RTDirRelDirOpenFiltered(hDir, pszDir, RTDIRFILTER_NONE, 0 /*fFlags*/, phDir); } RTDECL(int) RTDirRelDirOpenFiltered(RTDIR hDir, const char *pszDirAndFilter, RTDIRFILTER enmFilter, uint32_t fFlags, RTDIR *phDir) { PRTDIRINTERNAL pThis = hDir; AssertPtrReturn(pThis, VERR_INVALID_HANDLE); AssertReturn(pThis->u32Magic == RTDIR_MAGIC, VERR_INVALID_HANDLE); /* * Convert and normalize the path. */ UNICODE_STRING NtName; HANDLE hRoot = pThis->hDir; int rc = RTNtPathRelativeFromUtf8(&NtName, &hRoot, pszDirAndFilter, RTDIRREL_NT_GET_ASCENT(pThis), pThis->enmInfoClass == FileMaximumInformation); if (RT_SUCCESS(rc)) { char szAbsDirAndFilter[RTPATH_MAX]; rc = rtDirRelJoinPathForDirOpen(szAbsDirAndFilter, sizeof(szAbsDirAndFilter), pThis, &NtName, hRoot != NULL, pszDirAndFilter); if (RT_SUCCESS(rc)) { /* Drop the filter from the NT name. */ switch (enmFilter) { case RTDIRFILTER_NONE: break; case RTDIRFILTER_WINNT: case RTDIRFILTER_UNIX: case RTDIRFILTER_UNIX_UPCASED: { size_t cwc = NtName.Length / sizeof(RTUTF16); while ( cwc > 0 && NtName.Buffer[cwc - 1] != '\\') cwc--; NtName.Buffer[cwc] = '\0'; NtName.Length = (uint16_t)(cwc * sizeof(RTUTF16)); break; } default: AssertFailedBreak(); } rc = rtDirOpenRelativeOrHandle(phDir, szAbsDirAndFilter, enmFilter, fFlags, (uintptr_t)hRoot, &NtName); } RTNtPathFree(&NtName, NULL); } return rc; } RTDECL(int) RTDirRelDirCreate(RTDIR hDir, const char *pszRelPath, RTFMODE fMode, uint32_t fCreate, RTDIR *phSubDir) { PRTDIRINTERNAL pThis = hDir; AssertPtrReturn(pThis, VERR_INVALID_HANDLE); AssertReturn(pThis->u32Magic == RTDIR_MAGIC, VERR_INVALID_HANDLE); AssertReturn(!(fCreate & ~RTDIRCREATE_FLAGS_VALID_MASK), VERR_INVALID_FLAGS); fMode = rtFsModeNormalize(fMode, pszRelPath, 0, RTFS_TYPE_DIRECTORY); AssertReturn(rtFsModeIsValidPermissions(fMode), VERR_INVALID_FMODE); AssertPtrNullReturn(phSubDir, VERR_INVALID_POINTER); /* * Convert and normalize the path. */ UNICODE_STRING NtName; HANDLE hRoot = pThis->hDir; int rc = RTNtPathRelativeFromUtf8(&NtName, &hRoot, pszRelPath, RTDIRREL_NT_GET_ASCENT(pThis), pThis->enmInfoClass == FileMaximumInformation); if (RT_SUCCESS(rc)) { HANDLE hNewDir = RTNT_INVALID_HANDLE_VALUE; IO_STATUS_BLOCK Ios = RTNT_IO_STATUS_BLOCK_INITIALIZER; OBJECT_ATTRIBUTES ObjAttr; InitializeObjectAttributes(&ObjAttr, &NtName, 0 /*fAttrib*/, hRoot, NULL); ULONG fDirAttribs = (fCreate & RTFS_DOS_MASK_NT) >> RTFS_DOS_SHIFT; if (!(fCreate & RTDIRCREATE_FLAGS_NOT_CONTENT_INDEXED_DONT_SET)) fDirAttribs |= FILE_ATTRIBUTE_NOT_CONTENT_INDEXED; if (!fDirAttribs) fDirAttribs = FILE_ATTRIBUTE_NORMAL; NTSTATUS rcNt = NtCreateFile(&hNewDir, phSubDir ? FILE_WRITE_ATTRIBUTES | FILE_READ_ATTRIBUTES | FILE_LIST_DIRECTORY | FILE_TRAVERSE | SYNCHRONIZE : SYNCHRONIZE, &ObjAttr, &Ios, NULL /*AllocationSize*/, fDirAttribs, FILE_SHARE_READ | FILE_SHARE_WRITE, FILE_CREATE, FILE_DIRECTORY_FILE | FILE_OPEN_FOR_BACKUP_INTENT | FILE_SYNCHRONOUS_IO_NONALERT, NULL /*EaBuffer*/, 0 /*EaLength*/); /* Just in case someone takes offence at FILE_ATTRIBUTE_NOT_CONTENT_INDEXED. */ if ( ( rcNt == STATUS_INVALID_PARAMETER || rcNt == STATUS_INVALID_PARAMETER_7) && (fDirAttribs & FILE_ATTRIBUTE_NOT_CONTENT_INDEXED) && (fCreate & RTDIRCREATE_FLAGS_NOT_CONTENT_INDEXED_NOT_CRITICAL) ) { fDirAttribs &= ~FILE_ATTRIBUTE_NOT_CONTENT_INDEXED; if (!fDirAttribs) fDirAttribs = FILE_ATTRIBUTE_NORMAL; rcNt = NtCreateFile(&hNewDir, phSubDir ? FILE_WRITE_ATTRIBUTES | FILE_READ_ATTRIBUTES | FILE_LIST_DIRECTORY | FILE_TRAVERSE | SYNCHRONIZE : SYNCHRONIZE, &ObjAttr, &Ios, NULL /*AllocationSize*/, fDirAttribs, FILE_SHARE_READ | FILE_SHARE_WRITE, FILE_CREATE, FILE_DIRECTORY_FILE | FILE_OPEN_FOR_BACKUP_INTENT | FILE_SYNCHRONOUS_IO_NONALERT, NULL /*EaBuffer*/, 0 /*EaLength*/); } if (NT_SUCCESS(rcNt)) { if (!phSubDir) { NtClose(hNewDir); rc = VINF_SUCCESS; } else { char szAbsDirAndFilter[RTPATH_MAX]; rc = rtDirRelJoinPathForDirOpen(szAbsDirAndFilter, sizeof(szAbsDirAndFilter), pThis, &NtName, hRoot != NULL, pszRelPath); if (RT_SUCCESS(rc)) rc = rtDirOpenRelativeOrHandle(phSubDir, pszRelPath, RTDIRFILTER_NONE, 0 /*fFlags*/, (uintptr_t)hNewDir, NULL /*pvNativeRelative*/); if (RT_FAILURE(rc)) NtClose(hNewDir); } } else rc = RTErrConvertFromNtStatus(rcNt); RTNtPathFree(&NtName, NULL); } return rc; } RTDECL(int) RTDirRelDirRemove(RTDIR hDir, const char *pszRelPath) { PRTDIRINTERNAL pThis = hDir; AssertPtrReturn(pThis, VERR_INVALID_HANDLE); AssertReturn(pThis->u32Magic == RTDIR_MAGIC, VERR_INVALID_HANDLE); /* * Convert and normalize the path. */ UNICODE_STRING NtName; HANDLE hRoot = pThis->hDir; int rc = RTNtPathRelativeFromUtf8(&NtName, &hRoot, pszRelPath, RTDIRREL_NT_GET_ASCENT(pThis), pThis->enmInfoClass == FileMaximumInformation); if (RT_SUCCESS(rc)) { HANDLE hSubDir = RTNT_INVALID_HANDLE_VALUE; IO_STATUS_BLOCK Ios = RTNT_IO_STATUS_BLOCK_INITIALIZER; OBJECT_ATTRIBUTES ObjAttr; InitializeObjectAttributes(&ObjAttr, &NtName, 0 /*fAttrib*/, hRoot, NULL); NTSTATUS rcNt = NtCreateFile(&hSubDir, DELETE | SYNCHRONIZE, &ObjAttr, &Ios, NULL /*AllocationSize*/, FILE_ATTRIBUTE_NORMAL, FILE_SHARE_DELETE | FILE_SHARE_READ | FILE_SHARE_WRITE, FILE_OPEN, FILE_DIRECTORY_FILE | FILE_OPEN_FOR_BACKUP_INTENT | FILE_SYNCHRONOUS_IO_NONALERT | FILE_OPEN_REPARSE_POINT, NULL /*EaBuffer*/, 0 /*EaLength*/); if (NT_SUCCESS(rcNt)) { FILE_DISPOSITION_INFORMATION DispInfo; DispInfo.DeleteFile = TRUE; RTNT_IO_STATUS_BLOCK_REINIT(&Ios); rcNt = NtSetInformationFile(hSubDir, &Ios, &DispInfo, sizeof(DispInfo), FileDispositionInformation); NTSTATUS rcNt2 = NtClose(hSubDir); if (!NT_SUCCESS(rcNt2) && NT_SUCCESS(rcNt)) rcNt = rcNt2; } if (NT_SUCCESS(rcNt)) rc = VINF_SUCCESS; else rc = RTErrConvertFromNtStatus(rcNt); RTNtPathFree(&NtName, NULL); } return rc; } /* * * RTPath stuff. * RTPath stuff. * RTPath stuff. * * */ RTDECL(int) RTDirRelPathQueryInfo(RTDIR hDir, const char *pszRelPath, PRTFSOBJINFO pObjInfo, RTFSOBJATTRADD enmAddAttr, uint32_t fFlags) { PRTDIRINTERNAL pThis = hDir; AssertPtrReturn(pThis, VERR_INVALID_HANDLE); AssertReturn(pThis->u32Magic == RTDIR_MAGIC, VERR_INVALID_HANDLE); /* * Validate and convert flags. */ UNICODE_STRING NtName; HANDLE hRoot = pThis->hDir; int rc = RTNtPathRelativeFromUtf8(&NtName, &hRoot, pszRelPath, RTDIRREL_NT_GET_ASCENT(pThis), pThis->enmInfoClass == FileMaximumInformation); if (RT_SUCCESS(rc)) { if (NtName.Length != 0 || hRoot == NULL) rc = rtPathNtQueryInfoWorker(hRoot, &NtName, pObjInfo, enmAddAttr, fFlags, pszRelPath); else rc = RTDirQueryInfo(hDir, pObjInfo, enmAddAttr); RTNtPathFree(&NtName, NULL); } return rc; } RTDECL(int) RTDirRelPathSetMode(RTDIR hDir, const char *pszRelPath, RTFMODE fMode, uint32_t fFlags) { PRTDIRINTERNAL pThis = hDir; AssertPtrReturn(pThis, VERR_INVALID_HANDLE); AssertReturn(pThis->u32Magic == RTDIR_MAGIC, VERR_INVALID_HANDLE); fMode = rtFsModeNormalize(fMode, pszRelPath, 0, 0); AssertReturn(rtFsModeIsValidPermissions(fMode), VERR_INVALID_FMODE); AssertMsgReturn(RTPATH_F_IS_VALID(fFlags, 0), ("%#x\n", fFlags), VERR_INVALID_FLAGS); /* * Convert and normalize the path. */ UNICODE_STRING NtName; HANDLE hRoot = pThis->hDir; int rc = RTNtPathRelativeFromUtf8(&NtName, &hRoot, pszRelPath, RTDIRREL_NT_GET_ASCENT(pThis), pThis->enmInfoClass == FileMaximumInformation); if (RT_SUCCESS(rc)) { HANDLE hSubDir = RTNT_INVALID_HANDLE_VALUE; IO_STATUS_BLOCK Ios = RTNT_IO_STATUS_BLOCK_INITIALIZER; OBJECT_ATTRIBUTES ObjAttr; InitializeObjectAttributes(&ObjAttr, &NtName, 0 /*fAttrib*/, hRoot, NULL); ULONG fOpenOptions = FILE_OPEN_FOR_BACKUP_INTENT | FILE_SYNCHRONOUS_IO_NONALERT | FILE_OPEN_REPARSE_POINT; if (fFlags & RTPATH_F_ON_LINK) fOpenOptions |= FILE_OPEN_REPARSE_POINT; NTSTATUS rcNt = NtCreateFile(&hSubDir, FILE_WRITE_ATTRIBUTES | SYNCHRONIZE, &ObjAttr, &Ios, NULL /*AllocationSize*/, FILE_ATTRIBUTE_NORMAL, FILE_SHARE_DELETE | FILE_SHARE_READ | FILE_SHARE_WRITE, FILE_OPEN, fOpenOptions, NULL /*EaBuffer*/, 0 /*EaLength*/); if (NT_SUCCESS(rcNt)) { rc = rtNtFileSetModeWorker(hSubDir, fMode); rcNt = NtClose(hSubDir); if (!NT_SUCCESS(rcNt) && RT_SUCCESS(rc)) rc = RTErrConvertFromNtStatus(rcNt); } else rc = RTErrConvertFromNtStatus(rcNt); RTNtPathFree(&NtName, NULL); } return rc; } RTDECL(int) RTDirRelPathSetTimes(RTDIR hDir, const char *pszRelPath, PCRTTIMESPEC pAccessTime, PCRTTIMESPEC pModificationTime, PCRTTIMESPEC pChangeTime, PCRTTIMESPEC pBirthTime, uint32_t fFlags) { PRTDIRINTERNAL pThis = hDir; AssertPtrReturn(pThis, VERR_INVALID_HANDLE); AssertReturn(pThis->u32Magic == RTDIR_MAGIC, VERR_INVALID_HANDLE); char szPath[RTPATH_MAX]; int rc = rtDirRelBuildFullPath(pThis, szPath, sizeof(szPath), pszRelPath); if (RT_SUCCESS(rc)) rc = RTPathSetTimesEx(szPath, pAccessTime, pModificationTime, pChangeTime, pBirthTime, fFlags); return rc; } RTDECL(int) RTDirRelPathSetOwner(RTDIR hDir, const char *pszRelPath, uint32_t uid, uint32_t gid, uint32_t fFlags) { PRTDIRINTERNAL pThis = hDir; AssertPtrReturn(pThis, VERR_INVALID_HANDLE); AssertReturn(pThis->u32Magic == RTDIR_MAGIC, VERR_INVALID_HANDLE); char szPath[RTPATH_MAX]; int rc = rtDirRelBuildFullPath(pThis, szPath, sizeof(szPath), pszRelPath); if (RT_SUCCESS(rc)) { #ifndef RT_OS_WINDOWS rc = RTPathSetOwnerEx(szPath, uid, gid, fFlags); #else rc = VERR_NOT_IMPLEMENTED; RT_NOREF(uid, gid, fFlags); #endif } return rc; } RTDECL(int) RTDirRelPathRename(RTDIR hDirSrc, const char *pszSrc, RTDIR hDirDst, const char *pszDst, unsigned fRename) { PRTDIRINTERNAL pThis = hDirSrc; AssertPtrReturn(pThis, VERR_INVALID_HANDLE); AssertReturn(pThis->u32Magic == RTDIR_MAGIC, VERR_INVALID_HANDLE); PRTDIRINTERNAL pThat = hDirDst; if (pThat != pThis) { AssertPtrReturn(pThat, VERR_INVALID_HANDLE); AssertReturn(pThat->u32Magic != RTDIR_MAGIC, VERR_INVALID_HANDLE); } char szSrcPath[RTPATH_MAX]; int rc = rtDirRelBuildFullPath(pThis, szSrcPath, sizeof(szSrcPath), pszSrc); if (RT_SUCCESS(rc)) { char szDstPath[RTPATH_MAX]; rc = rtDirRelBuildFullPath(pThis, szDstPath, sizeof(szDstPath), pszDst); if (RT_SUCCESS(rc)) rc = RTPathRename(szSrcPath, szDstPath, fRename); } return rc; } RTDECL(int) RTDirRelPathUnlink(RTDIR hDir, const char *pszRelPath, uint32_t fUnlink) { PRTDIRINTERNAL pThis = hDir; AssertPtrReturn(pThis, VERR_INVALID_HANDLE); AssertReturn(pThis->u32Magic == RTDIR_MAGIC, VERR_INVALID_HANDLE); char szPath[RTPATH_MAX]; int rc = rtDirRelBuildFullPath(pThis, szPath, sizeof(szPath), pszRelPath); if (RT_SUCCESS(rc)) rc = RTPathUnlink(szPath, fUnlink); return rc; } /* * * RTSymlink stuff. * RTSymlink stuff. * RTSymlink stuff. * * */ RTDECL(int) RTDirRelSymlinkCreate(RTDIR hDir, const char *pszSymlink, const char *pszTarget, RTSYMLINKTYPE enmType, uint32_t fCreate) { PRTDIRINTERNAL pThis = hDir; AssertPtrReturn(pThis, VERR_INVALID_HANDLE); AssertReturn(pThis->u32Magic == RTDIR_MAGIC, VERR_INVALID_HANDLE); char szPath[RTPATH_MAX]; int rc = rtDirRelBuildFullPath(pThis, szPath, sizeof(szPath), pszSymlink); if (RT_SUCCESS(rc)) rc = RTSymlinkCreate(szPath, pszTarget, enmType, fCreate); return rc; } RTDECL(int) RTDirRelSymlinkRead(RTDIR hDir, const char *pszSymlink, char *pszTarget, size_t cbTarget, uint32_t fRead) { PRTDIRINTERNAL pThis = hDir; AssertPtrReturn(pThis, VERR_INVALID_HANDLE); AssertReturn(pThis->u32Magic == RTDIR_MAGIC, VERR_INVALID_HANDLE); char szPath[RTPATH_MAX]; int rc = rtDirRelBuildFullPath(pThis, szPath, sizeof(szPath), pszSymlink); if (RT_SUCCESS(rc)) rc = RTSymlinkRead(szPath, pszTarget, cbTarget, fRead); return rc; }