c9579522f347fc3fda6b3f4add0b355981cd7758vboxsync/* $Id$ */
c9579522f347fc3fda6b3f4add0b355981cd7758vboxsync/** @file
c9579522f347fc3fda6b3f4add0b355981cd7758vboxsync * IPRT - Symbolic Links, Windows.
c9579522f347fc3fda6b3f4add0b355981cd7758vboxsync */
c9579522f347fc3fda6b3f4add0b355981cd7758vboxsync
c9579522f347fc3fda6b3f4add0b355981cd7758vboxsync/*
c7814cf6e1240a519cbec0441e033d0e2470ed00vboxsync * Copyright (C) 2010-2011 Oracle Corporation
c9579522f347fc3fda6b3f4add0b355981cd7758vboxsync *
c9579522f347fc3fda6b3f4add0b355981cd7758vboxsync * This file is part of VirtualBox Open Source Edition (OSE), as
c9579522f347fc3fda6b3f4add0b355981cd7758vboxsync * available from http://www.virtualbox.org. This file is free software;
c9579522f347fc3fda6b3f4add0b355981cd7758vboxsync * you can redistribute it and/or modify it under the terms of the GNU
c9579522f347fc3fda6b3f4add0b355981cd7758vboxsync * General Public License (GPL) as published by the Free Software
c9579522f347fc3fda6b3f4add0b355981cd7758vboxsync * Foundation, in version 2 as it comes in the "COPYING" file of the
c9579522f347fc3fda6b3f4add0b355981cd7758vboxsync * VirtualBox OSE distribution. VirtualBox OSE is distributed in the
c9579522f347fc3fda6b3f4add0b355981cd7758vboxsync * hope that it will be useful, but WITHOUT ANY WARRANTY of any kind.
c9579522f347fc3fda6b3f4add0b355981cd7758vboxsync *
c9579522f347fc3fda6b3f4add0b355981cd7758vboxsync * The contents of this file may alternatively be used under the terms
c9579522f347fc3fda6b3f4add0b355981cd7758vboxsync * of the Common Development and Distribution License Version 1.0
c9579522f347fc3fda6b3f4add0b355981cd7758vboxsync * (CDDL) only, as it comes in the "COPYING.CDDL" file of the
c9579522f347fc3fda6b3f4add0b355981cd7758vboxsync * VirtualBox OSE distribution, in which case the provisions of the
c9579522f347fc3fda6b3f4add0b355981cd7758vboxsync * CDDL are applicable instead of those of the GPL.
c9579522f347fc3fda6b3f4add0b355981cd7758vboxsync *
c9579522f347fc3fda6b3f4add0b355981cd7758vboxsync * You may elect to license modified versions of this file under the
c9579522f347fc3fda6b3f4add0b355981cd7758vboxsync * terms and conditions of either the GPL or the CDDL or both.
c9579522f347fc3fda6b3f4add0b355981cd7758vboxsync */
c9579522f347fc3fda6b3f4add0b355981cd7758vboxsync
c9579522f347fc3fda6b3f4add0b355981cd7758vboxsync
c9579522f347fc3fda6b3f4add0b355981cd7758vboxsync/*******************************************************************************
c9579522f347fc3fda6b3f4add0b355981cd7758vboxsync* Header Files *
c9579522f347fc3fda6b3f4add0b355981cd7758vboxsync*******************************************************************************/
c9579522f347fc3fda6b3f4add0b355981cd7758vboxsync#define LOG_GROUP RTLOGGROUP_SYMLINK
2ebdf3d2131d683bde27a65eeef2450d8834fec9vboxsync#include <Windows.h>
c9579522f347fc3fda6b3f4add0b355981cd7758vboxsync
c9579522f347fc3fda6b3f4add0b355981cd7758vboxsync#include <iprt/symlink.h>
2ebdf3d2131d683bde27a65eeef2450d8834fec9vboxsync#include "internal-r3-win.h"
c9579522f347fc3fda6b3f4add0b355981cd7758vboxsync
c9579522f347fc3fda6b3f4add0b355981cd7758vboxsync#include <iprt/assert.h>
c9579522f347fc3fda6b3f4add0b355981cd7758vboxsync#include <iprt/err.h>
c9579522f347fc3fda6b3f4add0b355981cd7758vboxsync#include <iprt/log.h>
c9579522f347fc3fda6b3f4add0b355981cd7758vboxsync#include <iprt/path.h>
c9579522f347fc3fda6b3f4add0b355981cd7758vboxsync#include <iprt/mem.h>
c9579522f347fc3fda6b3f4add0b355981cd7758vboxsync#include <iprt/string.h>
c9579522f347fc3fda6b3f4add0b355981cd7758vboxsync#include "internal/path.h"
c9579522f347fc3fda6b3f4add0b355981cd7758vboxsync
c9579522f347fc3fda6b3f4add0b355981cd7758vboxsync
c9579522f347fc3fda6b3f4add0b355981cd7758vboxsync
b06e6c768b741a16534846e399da98ffc59693dbvboxsync/*******************************************************************************
b06e6c768b741a16534846e399da98ffc59693dbvboxsync* Structures and Typedefs *
b06e6c768b741a16534846e399da98ffc59693dbvboxsync*******************************************************************************/
b06e6c768b741a16534846e399da98ffc59693dbvboxsynctypedef struct MY_REPARSE_DATA_BUFFER
b06e6c768b741a16534846e399da98ffc59693dbvboxsync{
b06e6c768b741a16534846e399da98ffc59693dbvboxsync ULONG ReparseTag;
b06e6c768b741a16534846e399da98ffc59693dbvboxsync#define MY_IO_REPARSE_TAG_SYMLINK 0xa000000c
b06e6c768b741a16534846e399da98ffc59693dbvboxsync#define MY_IO_REPARSE_TAG_MOUNT_POINT 0xa0000003
b06e6c768b741a16534846e399da98ffc59693dbvboxsync
b06e6c768b741a16534846e399da98ffc59693dbvboxsync USHORT ReparseDataLength;
b06e6c768b741a16534846e399da98ffc59693dbvboxsync USHORT Reserved;
b06e6c768b741a16534846e399da98ffc59693dbvboxsync union
b06e6c768b741a16534846e399da98ffc59693dbvboxsync {
b06e6c768b741a16534846e399da98ffc59693dbvboxsync struct
b06e6c768b741a16534846e399da98ffc59693dbvboxsync {
b06e6c768b741a16534846e399da98ffc59693dbvboxsync USHORT SubstituteNameOffset;
b06e6c768b741a16534846e399da98ffc59693dbvboxsync USHORT SubstituteNameLength;
b06e6c768b741a16534846e399da98ffc59693dbvboxsync USHORT PrintNameOffset;
b06e6c768b741a16534846e399da98ffc59693dbvboxsync USHORT PrintNameLength;
b06e6c768b741a16534846e399da98ffc59693dbvboxsync ULONG Flags;
b06e6c768b741a16534846e399da98ffc59693dbvboxsync#define MY_SYMLINK_FLAG_RELATIVE 1
b06e6c768b741a16534846e399da98ffc59693dbvboxsync WCHAR PathBuffer[1];
b06e6c768b741a16534846e399da98ffc59693dbvboxsync } SymbolicLinkReparseBuffer;
b06e6c768b741a16534846e399da98ffc59693dbvboxsync struct
b06e6c768b741a16534846e399da98ffc59693dbvboxsync {
b06e6c768b741a16534846e399da98ffc59693dbvboxsync USHORT SubstituteNameOffset;
b06e6c768b741a16534846e399da98ffc59693dbvboxsync USHORT SubstituteNameLength;
b06e6c768b741a16534846e399da98ffc59693dbvboxsync USHORT PrintNameOffset;
b06e6c768b741a16534846e399da98ffc59693dbvboxsync USHORT PrintNameLength;
b06e6c768b741a16534846e399da98ffc59693dbvboxsync WCHAR PathBuffer[1];
b06e6c768b741a16534846e399da98ffc59693dbvboxsync } MountPointReparseBuffer;
b06e6c768b741a16534846e399da98ffc59693dbvboxsync struct
b06e6c768b741a16534846e399da98ffc59693dbvboxsync {
b06e6c768b741a16534846e399da98ffc59693dbvboxsync UCHAR DataBuffer[1];
b06e6c768b741a16534846e399da98ffc59693dbvboxsync } GenericReparseBuffer;
b06e6c768b741a16534846e399da98ffc59693dbvboxsync };
b06e6c768b741a16534846e399da98ffc59693dbvboxsync} MY_REPARSE_DATA_BUFFER;
b06e6c768b741a16534846e399da98ffc59693dbvboxsync#define MY_FSCTL_GET_REPARSE_POINT CTL_CODE(FILE_DEVICE_FILE_SYSTEM, 42, METHOD_BUFFERED, FILE_ANY_ACCESS)
b06e6c768b741a16534846e399da98ffc59693dbvboxsync
b06e6c768b741a16534846e399da98ffc59693dbvboxsync
c9579522f347fc3fda6b3f4add0b355981cd7758vboxsyncRTDECL(bool) RTSymlinkExists(const char *pszSymlink)
c9579522f347fc3fda6b3f4add0b355981cd7758vboxsync{
c9579522f347fc3fda6b3f4add0b355981cd7758vboxsync bool fRc = false;
c9579522f347fc3fda6b3f4add0b355981cd7758vboxsync RTFSOBJINFO ObjInfo;
c9579522f347fc3fda6b3f4add0b355981cd7758vboxsync int rc = RTPathQueryInfoEx(pszSymlink, &ObjInfo, RTFSOBJATTRADD_NOTHING, RTPATH_F_ON_LINK);
c9579522f347fc3fda6b3f4add0b355981cd7758vboxsync if (RT_SUCCESS(rc))
c9579522f347fc3fda6b3f4add0b355981cd7758vboxsync fRc = RTFS_IS_SYMLINK(ObjInfo.Attr.fMode);
c9579522f347fc3fda6b3f4add0b355981cd7758vboxsync
c9579522f347fc3fda6b3f4add0b355981cd7758vboxsync LogFlow(("RTSymlinkExists(%p={%s}): returns %RTbool\n", pszSymlink, pszSymlink, fRc));
c9579522f347fc3fda6b3f4add0b355981cd7758vboxsync return fRc;
c9579522f347fc3fda6b3f4add0b355981cd7758vboxsync}
c9579522f347fc3fda6b3f4add0b355981cd7758vboxsync
c9579522f347fc3fda6b3f4add0b355981cd7758vboxsync
c9579522f347fc3fda6b3f4add0b355981cd7758vboxsyncRTDECL(bool) RTSymlinkIsDangling(const char *pszSymlink)
c9579522f347fc3fda6b3f4add0b355981cd7758vboxsync{
c9579522f347fc3fda6b3f4add0b355981cd7758vboxsync bool fRc = false;
c9579522f347fc3fda6b3f4add0b355981cd7758vboxsync RTFSOBJINFO ObjInfo;
c9579522f347fc3fda6b3f4add0b355981cd7758vboxsync int rc = RTPathQueryInfoEx(pszSymlink, &ObjInfo, RTFSOBJATTRADD_NOTHING, RTPATH_F_ON_LINK);
c9579522f347fc3fda6b3f4add0b355981cd7758vboxsync if (RT_SUCCESS(rc))
c9579522f347fc3fda6b3f4add0b355981cd7758vboxsync {
c9579522f347fc3fda6b3f4add0b355981cd7758vboxsync fRc = RTFS_IS_SYMLINK(ObjInfo.Attr.fMode);
c9579522f347fc3fda6b3f4add0b355981cd7758vboxsync if (fRc)
c9579522f347fc3fda6b3f4add0b355981cd7758vboxsync {
c9579522f347fc3fda6b3f4add0b355981cd7758vboxsync rc = RTPathQueryInfoEx(pszSymlink, &ObjInfo, RTFSOBJATTRADD_NOTHING, RTPATH_F_FOLLOW_LINK);
b06e6c768b741a16534846e399da98ffc59693dbvboxsync fRc = !RT_SUCCESS_NP(rc);
c9579522f347fc3fda6b3f4add0b355981cd7758vboxsync }
c9579522f347fc3fda6b3f4add0b355981cd7758vboxsync }
c9579522f347fc3fda6b3f4add0b355981cd7758vboxsync
c9579522f347fc3fda6b3f4add0b355981cd7758vboxsync LogFlow(("RTSymlinkIsDangling(%p={%s}): returns %RTbool\n", pszSymlink, pszSymlink, fRc));
c9579522f347fc3fda6b3f4add0b355981cd7758vboxsync return fRc;
c9579522f347fc3fda6b3f4add0b355981cd7758vboxsync}
c9579522f347fc3fda6b3f4add0b355981cd7758vboxsync
c9579522f347fc3fda6b3f4add0b355981cd7758vboxsync
939e2ecb812c6402abcc63e7d615c5444acfd02evboxsyncRTDECL(int) RTSymlinkCreate(const char *pszSymlink, const char *pszTarget, RTSYMLINKTYPE enmType, uint32_t fCreate)
c9579522f347fc3fda6b3f4add0b355981cd7758vboxsync{
c9579522f347fc3fda6b3f4add0b355981cd7758vboxsync /*
c9579522f347fc3fda6b3f4add0b355981cd7758vboxsync * Validate the input.
c9579522f347fc3fda6b3f4add0b355981cd7758vboxsync */
c9579522f347fc3fda6b3f4add0b355981cd7758vboxsync AssertReturn(enmType > RTSYMLINKTYPE_INVALID && enmType < RTSYMLINKTYPE_END, VERR_INVALID_PARAMETER);
c9579522f347fc3fda6b3f4add0b355981cd7758vboxsync AssertPtrReturn(pszSymlink, VERR_INVALID_POINTER);
c9579522f347fc3fda6b3f4add0b355981cd7758vboxsync AssertPtrReturn(pszTarget, VERR_INVALID_POINTER);
c9579522f347fc3fda6b3f4add0b355981cd7758vboxsync
c9579522f347fc3fda6b3f4add0b355981cd7758vboxsync /*
c9579522f347fc3fda6b3f4add0b355981cd7758vboxsync * Resolve the API.
c9579522f347fc3fda6b3f4add0b355981cd7758vboxsync */
c9579522f347fc3fda6b3f4add0b355981cd7758vboxsync typedef BOOLEAN (WINAPI *PFNCREATESYMBOLICLINKW)(LPCWSTR, LPCWSTR, DWORD);
c9579522f347fc3fda6b3f4add0b355981cd7758vboxsync static PFNCREATESYMBOLICLINKW s_pfnCreateSymbolicLinkW = NULL;
c9579522f347fc3fda6b3f4add0b355981cd7758vboxsync static bool s_fTried = FALSE;
c9579522f347fc3fda6b3f4add0b355981cd7758vboxsync if (!s_fTried)
c9579522f347fc3fda6b3f4add0b355981cd7758vboxsync {
71955773a7f477f9a159a491f765ba97e1f00e1avboxsync PFNCREATESYMBOLICLINKW pfn = (PFNCREATESYMBOLICLINKW)GetProcAddress(g_hModKernel32, "CreateSymbolicLinkW");
71955773a7f477f9a159a491f765ba97e1f00e1avboxsync if (pfn)
71955773a7f477f9a159a491f765ba97e1f00e1avboxsync s_pfnCreateSymbolicLinkW = pfn;
c9579522f347fc3fda6b3f4add0b355981cd7758vboxsync s_fTried = true;
c9579522f347fc3fda6b3f4add0b355981cd7758vboxsync }
c9579522f347fc3fda6b3f4add0b355981cd7758vboxsync if (!s_pfnCreateSymbolicLinkW)
c9579522f347fc3fda6b3f4add0b355981cd7758vboxsync {
939e2ecb812c6402abcc63e7d615c5444acfd02evboxsync LogFlow(("RTSymlinkCreate(%p={%s}, %p={%s}, %d, %#x): returns VERR_NOT_SUPPORTED - Windows API not found\n",
939e2ecb812c6402abcc63e7d615c5444acfd02evboxsync pszSymlink, pszSymlink, pszTarget, pszTarget, enmType, fCreate));
c9579522f347fc3fda6b3f4add0b355981cd7758vboxsync return VERR_NOT_SUPPORTED;
c9579522f347fc3fda6b3f4add0b355981cd7758vboxsync }
c9579522f347fc3fda6b3f4add0b355981cd7758vboxsync
c9579522f347fc3fda6b3f4add0b355981cd7758vboxsync /*
c9579522f347fc3fda6b3f4add0b355981cd7758vboxsync * Convert the paths.
c9579522f347fc3fda6b3f4add0b355981cd7758vboxsync */
c9579522f347fc3fda6b3f4add0b355981cd7758vboxsync PRTUTF16 pwszNativeSymlink;
c9579522f347fc3fda6b3f4add0b355981cd7758vboxsync int rc = RTStrToUtf16(pszSymlink, &pwszNativeSymlink);
c9579522f347fc3fda6b3f4add0b355981cd7758vboxsync if (RT_SUCCESS(rc))
c9579522f347fc3fda6b3f4add0b355981cd7758vboxsync {
c9579522f347fc3fda6b3f4add0b355981cd7758vboxsync PRTUTF16 pwszNativeTarget;
c9579522f347fc3fda6b3f4add0b355981cd7758vboxsync rc = RTStrToUtf16(pszTarget, &pwszNativeTarget);
c9579522f347fc3fda6b3f4add0b355981cd7758vboxsync if (RT_SUCCESS(rc))
c9579522f347fc3fda6b3f4add0b355981cd7758vboxsync {
54109da74885992a65e07d4e668f4900ff3e7c4evboxsync /* The link target path must use backslashes to work reliably. */
54109da74885992a65e07d4e668f4900ff3e7c4evboxsync RTUTF16 wc;
54109da74885992a65e07d4e668f4900ff3e7c4evboxsync PRTUTF16 pwsz = pwszNativeTarget;
54109da74885992a65e07d4e668f4900ff3e7c4evboxsync while ((wc = *pwsz) != '\0')
54109da74885992a65e07d4e668f4900ff3e7c4evboxsync {
54109da74885992a65e07d4e668f4900ff3e7c4evboxsync if (wc == '/')
54109da74885992a65e07d4e668f4900ff3e7c4evboxsync *pwsz = '\\';
54109da74885992a65e07d4e668f4900ff3e7c4evboxsync pwsz++;
54109da74885992a65e07d4e668f4900ff3e7c4evboxsync }
54109da74885992a65e07d4e668f4900ff3e7c4evboxsync
c9579522f347fc3fda6b3f4add0b355981cd7758vboxsync /*
c9579522f347fc3fda6b3f4add0b355981cd7758vboxsync * Massage the target path, determin the link type.
c9579522f347fc3fda6b3f4add0b355981cd7758vboxsync */
c9579522f347fc3fda6b3f4add0b355981cd7758vboxsync size_t cchTarget = strlen(pszTarget);
c9579522f347fc3fda6b3f4add0b355981cd7758vboxsync size_t cchVolSpecTarget = rtPathVolumeSpecLen(pszTarget);
b06e6c768b741a16534846e399da98ffc59693dbvboxsync#if 0 /* looks like this isn't needed after all. That makes everything much simper :-) */
c9579522f347fc3fda6b3f4add0b355981cd7758vboxsync if ( cchTarget > RT_MIN(cchVolSpecTarget, 1)
c9579522f347fc3fda6b3f4add0b355981cd7758vboxsync && RTPATH_IS_SLASH(pszTarget[cchTarget - 1]))
c9579522f347fc3fda6b3f4add0b355981cd7758vboxsync {
c9579522f347fc3fda6b3f4add0b355981cd7758vboxsync size_t cwcNativeTarget = RTUtf16Len(pwszNativeTarget);
c9579522f347fc3fda6b3f4add0b355981cd7758vboxsync size_t offFromEnd = 1;
c9579522f347fc3fda6b3f4add0b355981cd7758vboxsync while ( offFromEnd < cchTarget
c9579522f347fc3fda6b3f4add0b355981cd7758vboxsync && cchTarget - offFromEnd >= cchVolSpecTarget
c9579522f347fc3fda6b3f4add0b355981cd7758vboxsync && RTPATH_IS_SLASH(pszTarget[cchTarget - offFromEnd]))
c9579522f347fc3fda6b3f4add0b355981cd7758vboxsync {
c9579522f347fc3fda6b3f4add0b355981cd7758vboxsync Assert(offFromEnd < cwcNativeTarget);
c9579522f347fc3fda6b3f4add0b355981cd7758vboxsync pwszNativeTarget[cwcNativeTarget - offFromEnd] = 0;
c9579522f347fc3fda6b3f4add0b355981cd7758vboxsync offFromEnd++;
c9579522f347fc3fda6b3f4add0b355981cd7758vboxsync }
c9579522f347fc3fda6b3f4add0b355981cd7758vboxsync }
b06e6c768b741a16534846e399da98ffc59693dbvboxsync#endif
c9579522f347fc3fda6b3f4add0b355981cd7758vboxsync
c9579522f347fc3fda6b3f4add0b355981cd7758vboxsync if (enmType == RTSYMLINKTYPE_UNKNOWN)
c9579522f347fc3fda6b3f4add0b355981cd7758vboxsync {
c9579522f347fc3fda6b3f4add0b355981cd7758vboxsync if ( cchTarget > cchVolSpecTarget
c9579522f347fc3fda6b3f4add0b355981cd7758vboxsync && RTPATH_IS_SLASH(pszTarget[cchTarget - 1]))
c9579522f347fc3fda6b3f4add0b355981cd7758vboxsync enmType = RTSYMLINKTYPE_DIR;
c9579522f347fc3fda6b3f4add0b355981cd7758vboxsync else if (cchVolSpecTarget)
c9579522f347fc3fda6b3f4add0b355981cd7758vboxsync {
b06e6c768b741a16534846e399da98ffc59693dbvboxsync /** @todo this is subject to sharing violations. */
c9579522f347fc3fda6b3f4add0b355981cd7758vboxsync DWORD dwAttr = GetFileAttributesW(pwszNativeTarget);
c9579522f347fc3fda6b3f4add0b355981cd7758vboxsync if ( dwAttr != INVALID_FILE_ATTRIBUTES
c9579522f347fc3fda6b3f4add0b355981cd7758vboxsync && (dwAttr & FILE_ATTRIBUTE_DIRECTORY))
c9579522f347fc3fda6b3f4add0b355981cd7758vboxsync enmType = RTSYMLINKTYPE_DIR;
c9579522f347fc3fda6b3f4add0b355981cd7758vboxsync }
c9579522f347fc3fda6b3f4add0b355981cd7758vboxsync else
c9579522f347fc3fda6b3f4add0b355981cd7758vboxsync {
c9579522f347fc3fda6b3f4add0b355981cd7758vboxsync /** @todo Join the symlink directory with the target and
c9579522f347fc3fda6b3f4add0b355981cd7758vboxsync * look up the attributes on that. -lazy bird. */
c9579522f347fc3fda6b3f4add0b355981cd7758vboxsync }
c9579522f347fc3fda6b3f4add0b355981cd7758vboxsync }
c9579522f347fc3fda6b3f4add0b355981cd7758vboxsync
c9579522f347fc3fda6b3f4add0b355981cd7758vboxsync /*
c9579522f347fc3fda6b3f4add0b355981cd7758vboxsync * Create the link.
c9579522f347fc3fda6b3f4add0b355981cd7758vboxsync */
c9579522f347fc3fda6b3f4add0b355981cd7758vboxsync if (s_pfnCreateSymbolicLinkW(pwszNativeSymlink, pwszNativeTarget, enmType == RTSYMLINKTYPE_DIR))
c9579522f347fc3fda6b3f4add0b355981cd7758vboxsync rc = VINF_SUCCESS;
c9579522f347fc3fda6b3f4add0b355981cd7758vboxsync else
c9579522f347fc3fda6b3f4add0b355981cd7758vboxsync rc = RTErrConvertFromWin32(GetLastError());
c9579522f347fc3fda6b3f4add0b355981cd7758vboxsync
c9579522f347fc3fda6b3f4add0b355981cd7758vboxsync RTUtf16Free(pwszNativeTarget);
c9579522f347fc3fda6b3f4add0b355981cd7758vboxsync }
c9579522f347fc3fda6b3f4add0b355981cd7758vboxsync RTUtf16Free(pwszNativeSymlink);
c9579522f347fc3fda6b3f4add0b355981cd7758vboxsync }
c9579522f347fc3fda6b3f4add0b355981cd7758vboxsync
939e2ecb812c6402abcc63e7d615c5444acfd02evboxsync LogFlow(("RTSymlinkCreate(%p={%s}, %p={%s}, %d, %#x): returns %Rrc\n", pszSymlink, pszSymlink, pszTarget, pszTarget, enmType, fCreate, rc));
c9579522f347fc3fda6b3f4add0b355981cd7758vboxsync return rc;
c9579522f347fc3fda6b3f4add0b355981cd7758vboxsync}
c9579522f347fc3fda6b3f4add0b355981cd7758vboxsync
c9579522f347fc3fda6b3f4add0b355981cd7758vboxsync
939e2ecb812c6402abcc63e7d615c5444acfd02evboxsyncRTDECL(int) RTSymlinkDelete(const char *pszSymlink, uint32_t fDelete)
c9579522f347fc3fda6b3f4add0b355981cd7758vboxsync{
c9579522f347fc3fda6b3f4add0b355981cd7758vboxsync /*
c9579522f347fc3fda6b3f4add0b355981cd7758vboxsync * Convert the path.
c9579522f347fc3fda6b3f4add0b355981cd7758vboxsync */
c9579522f347fc3fda6b3f4add0b355981cd7758vboxsync PRTUTF16 pwszNativeSymlink;
c9579522f347fc3fda6b3f4add0b355981cd7758vboxsync int rc = RTStrToUtf16(pszSymlink, &pwszNativeSymlink);
c9579522f347fc3fda6b3f4add0b355981cd7758vboxsync if (RT_SUCCESS(rc))
c9579522f347fc3fda6b3f4add0b355981cd7758vboxsync {
c9579522f347fc3fda6b3f4add0b355981cd7758vboxsync /*
c9579522f347fc3fda6b3f4add0b355981cd7758vboxsync * We have to use different APIs depending on whether this is a
c9579522f347fc3fda6b3f4add0b355981cd7758vboxsync * directory or file link. This means we're subject to one more race
c9579522f347fc3fda6b3f4add0b355981cd7758vboxsync * than on posix at the moment. We could probably avoid this though,
c9579522f347fc3fda6b3f4add0b355981cd7758vboxsync * if we wanted to go talk with the native API layer below Win32...
c9579522f347fc3fda6b3f4add0b355981cd7758vboxsync */
c9579522f347fc3fda6b3f4add0b355981cd7758vboxsync DWORD dwAttr = GetFileAttributesW(pwszNativeSymlink);
c9579522f347fc3fda6b3f4add0b355981cd7758vboxsync if (dwAttr != INVALID_FILE_ATTRIBUTES)
c9579522f347fc3fda6b3f4add0b355981cd7758vboxsync {
c9579522f347fc3fda6b3f4add0b355981cd7758vboxsync if (dwAttr & FILE_ATTRIBUTE_REPARSE_POINT)
c9579522f347fc3fda6b3f4add0b355981cd7758vboxsync {
c9579522f347fc3fda6b3f4add0b355981cd7758vboxsync BOOL fRc;
c9579522f347fc3fda6b3f4add0b355981cd7758vboxsync if (dwAttr & FILE_ATTRIBUTE_DIRECTORY)
c9579522f347fc3fda6b3f4add0b355981cd7758vboxsync fRc = RemoveDirectoryW(pwszNativeSymlink);
c9579522f347fc3fda6b3f4add0b355981cd7758vboxsync else
c9579522f347fc3fda6b3f4add0b355981cd7758vboxsync fRc = DeleteFileW(pwszNativeSymlink);
c9579522f347fc3fda6b3f4add0b355981cd7758vboxsync if (fRc)
c9579522f347fc3fda6b3f4add0b355981cd7758vboxsync rc = VINF_SUCCESS;
c9579522f347fc3fda6b3f4add0b355981cd7758vboxsync else
c9579522f347fc3fda6b3f4add0b355981cd7758vboxsync rc = RTErrConvertFromWin32(GetLastError());
c9579522f347fc3fda6b3f4add0b355981cd7758vboxsync }
c9579522f347fc3fda6b3f4add0b355981cd7758vboxsync else
c9579522f347fc3fda6b3f4add0b355981cd7758vboxsync rc = VERR_NOT_SYMLINK;
c9579522f347fc3fda6b3f4add0b355981cd7758vboxsync }
c9579522f347fc3fda6b3f4add0b355981cd7758vboxsync else
c9579522f347fc3fda6b3f4add0b355981cd7758vboxsync rc = RTErrConvertFromWin32(GetLastError());
c9579522f347fc3fda6b3f4add0b355981cd7758vboxsync RTUtf16Free(pwszNativeSymlink);
c9579522f347fc3fda6b3f4add0b355981cd7758vboxsync }
c9579522f347fc3fda6b3f4add0b355981cd7758vboxsync
939e2ecb812c6402abcc63e7d615c5444acfd02evboxsync LogFlow(("RTSymlinkDelete(%p={%s}, %#x): returns %Rrc\n", pszSymlink, pszSymlink, fDelete, rc));
c9579522f347fc3fda6b3f4add0b355981cd7758vboxsync return rc;
c9579522f347fc3fda6b3f4add0b355981cd7758vboxsync}
c9579522f347fc3fda6b3f4add0b355981cd7758vboxsync
c9579522f347fc3fda6b3f4add0b355981cd7758vboxsync
939e2ecb812c6402abcc63e7d615c5444acfd02evboxsyncRTDECL(int) RTSymlinkRead(const char *pszSymlink, char *pszTarget, size_t cbTarget, uint32_t fRead)
c9579522f347fc3fda6b3f4add0b355981cd7758vboxsync{
c9579522f347fc3fda6b3f4add0b355981cd7758vboxsync char *pszMyTarget;
c9579522f347fc3fda6b3f4add0b355981cd7758vboxsync int rc = RTSymlinkReadA(pszSymlink, &pszMyTarget);
c9579522f347fc3fda6b3f4add0b355981cd7758vboxsync if (RT_SUCCESS(rc))
c9579522f347fc3fda6b3f4add0b355981cd7758vboxsync {
c9579522f347fc3fda6b3f4add0b355981cd7758vboxsync rc = RTStrCopy(pszTarget, cbTarget, pszMyTarget);
c9579522f347fc3fda6b3f4add0b355981cd7758vboxsync RTStrFree(pszMyTarget);
c9579522f347fc3fda6b3f4add0b355981cd7758vboxsync }
c9579522f347fc3fda6b3f4add0b355981cd7758vboxsync LogFlow(("RTSymlinkRead(%p={%s}): returns %Rrc\n", pszSymlink, pszSymlink, rc));
c9579522f347fc3fda6b3f4add0b355981cd7758vboxsync return rc;
c9579522f347fc3fda6b3f4add0b355981cd7758vboxsync}
c9579522f347fc3fda6b3f4add0b355981cd7758vboxsync
c9579522f347fc3fda6b3f4add0b355981cd7758vboxsync
c9579522f347fc3fda6b3f4add0b355981cd7758vboxsyncRTDECL(int) RTSymlinkReadA(const char *pszSymlink, char **ppszTarget)
c9579522f347fc3fda6b3f4add0b355981cd7758vboxsync{
c9579522f347fc3fda6b3f4add0b355981cd7758vboxsync AssertPtr(ppszTarget);
c9579522f347fc3fda6b3f4add0b355981cd7758vboxsync PRTUTF16 pwszNativeSymlink;
c9579522f347fc3fda6b3f4add0b355981cd7758vboxsync int rc = RTStrToUtf16(pszSymlink, &pwszNativeSymlink);
c9579522f347fc3fda6b3f4add0b355981cd7758vboxsync if (RT_SUCCESS(rc))
c9579522f347fc3fda6b3f4add0b355981cd7758vboxsync {
c9579522f347fc3fda6b3f4add0b355981cd7758vboxsync HANDLE hSymlink = CreateFileW(pwszNativeSymlink,
c9579522f347fc3fda6b3f4add0b355981cd7758vboxsync GENERIC_READ,
c9579522f347fc3fda6b3f4add0b355981cd7758vboxsync FILE_SHARE_READ | FILE_SHARE_WRITE | FILE_SHARE_DELETE,
c9579522f347fc3fda6b3f4add0b355981cd7758vboxsync NULL,
c9579522f347fc3fda6b3f4add0b355981cd7758vboxsync OPEN_EXISTING,
b06e6c768b741a16534846e399da98ffc59693dbvboxsync FILE_FLAG_OPEN_REPARSE_POINT | FILE_FLAG_BACKUP_SEMANTICS,
c9579522f347fc3fda6b3f4add0b355981cd7758vboxsync NULL);
c9579522f347fc3fda6b3f4add0b355981cd7758vboxsync if (hSymlink != INVALID_HANDLE_VALUE)
c9579522f347fc3fda6b3f4add0b355981cd7758vboxsync {
b06e6c768b741a16534846e399da98ffc59693dbvboxsync DWORD cbReturned = 0;
b06e6c768b741a16534846e399da98ffc59693dbvboxsync union
b06e6c768b741a16534846e399da98ffc59693dbvboxsync {
b06e6c768b741a16534846e399da98ffc59693dbvboxsync MY_REPARSE_DATA_BUFFER Buf;
b06e6c768b741a16534846e399da98ffc59693dbvboxsync uint8_t abBuf[16*_1K + sizeof(WCHAR)];
b06e6c768b741a16534846e399da98ffc59693dbvboxsync } u;
b06e6c768b741a16534846e399da98ffc59693dbvboxsync if (DeviceIoControl(hSymlink,
b06e6c768b741a16534846e399da98ffc59693dbvboxsync MY_FSCTL_GET_REPARSE_POINT,
b06e6c768b741a16534846e399da98ffc59693dbvboxsync NULL /*pInBuffer */,
b06e6c768b741a16534846e399da98ffc59693dbvboxsync 0 /*cbInBuffer */,
b06e6c768b741a16534846e399da98ffc59693dbvboxsync &u.Buf,
b06e6c768b741a16534846e399da98ffc59693dbvboxsync sizeof(u) - sizeof(WCHAR),
b06e6c768b741a16534846e399da98ffc59693dbvboxsync &cbReturned,
b06e6c768b741a16534846e399da98ffc59693dbvboxsync NULL /*pOverlapped*/))
b06e6c768b741a16534846e399da98ffc59693dbvboxsync {
b06e6c768b741a16534846e399da98ffc59693dbvboxsync if (u.Buf.ReparseTag == MY_IO_REPARSE_TAG_SYMLINK)
b06e6c768b741a16534846e399da98ffc59693dbvboxsync {
b06e6c768b741a16534846e399da98ffc59693dbvboxsync PWCHAR pwszTarget = &u.Buf.SymbolicLinkReparseBuffer.PathBuffer[0];
b06e6c768b741a16534846e399da98ffc59693dbvboxsync pwszTarget += u.Buf.SymbolicLinkReparseBuffer.SubstituteNameOffset / 2;
b06e6c768b741a16534846e399da98ffc59693dbvboxsync pwszTarget[u.Buf.SymbolicLinkReparseBuffer.SubstituteNameLength / 2] = 0;
b06e6c768b741a16534846e399da98ffc59693dbvboxsync if ( !(u.Buf.SymbolicLinkReparseBuffer.Flags & MY_SYMLINK_FLAG_RELATIVE)
b06e6c768b741a16534846e399da98ffc59693dbvboxsync && pwszTarget[0] == '\\'
b06e6c768b741a16534846e399da98ffc59693dbvboxsync && pwszTarget[1] == '?'
b06e6c768b741a16534846e399da98ffc59693dbvboxsync && pwszTarget[2] == '?'
b06e6c768b741a16534846e399da98ffc59693dbvboxsync && pwszTarget[3] == '\\'
b06e6c768b741a16534846e399da98ffc59693dbvboxsync && pwszTarget[4] != 0
b06e6c768b741a16534846e399da98ffc59693dbvboxsync )
b06e6c768b741a16534846e399da98ffc59693dbvboxsync pwszTarget += 4;
b06e6c768b741a16534846e399da98ffc59693dbvboxsync rc = RTUtf16ToUtf8(pwszTarget, ppszTarget);
b06e6c768b741a16534846e399da98ffc59693dbvboxsync }
b06e6c768b741a16534846e399da98ffc59693dbvboxsync else
b06e6c768b741a16534846e399da98ffc59693dbvboxsync rc = VERR_NOT_SYMLINK;
b06e6c768b741a16534846e399da98ffc59693dbvboxsync }
b06e6c768b741a16534846e399da98ffc59693dbvboxsync else
b06e6c768b741a16534846e399da98ffc59693dbvboxsync rc = RTErrConvertFromWin32(GetLastError());
c9579522f347fc3fda6b3f4add0b355981cd7758vboxsync CloseHandle(hSymlink);
c9579522f347fc3fda6b3f4add0b355981cd7758vboxsync }
c9579522f347fc3fda6b3f4add0b355981cd7758vboxsync else
c9579522f347fc3fda6b3f4add0b355981cd7758vboxsync rc = RTErrConvertFromWin32(GetLastError());
c9579522f347fc3fda6b3f4add0b355981cd7758vboxsync RTUtf16Free(pwszNativeSymlink);
c9579522f347fc3fda6b3f4add0b355981cd7758vboxsync }
c9579522f347fc3fda6b3f4add0b355981cd7758vboxsync
c9579522f347fc3fda6b3f4add0b355981cd7758vboxsync if (RT_SUCCESS(rc))
c9579522f347fc3fda6b3f4add0b355981cd7758vboxsync LogFlow(("RTSymlinkReadA(%p={%s},%p): returns %Rrc *ppszTarget=%p:{%s}\n", pszSymlink, pszSymlink, ppszTarget, rc, *ppszTarget, *ppszTarget));
c9579522f347fc3fda6b3f4add0b355981cd7758vboxsync else
c9579522f347fc3fda6b3f4add0b355981cd7758vboxsync LogFlow(("RTSymlinkReadA(%p={%s},%p): returns %Rrc\n", pszSymlink, pszSymlink, ppszTarget, rc));
c9579522f347fc3fda6b3f4add0b355981cd7758vboxsync return rc;
c9579522f347fc3fda6b3f4add0b355981cd7758vboxsync}
c9579522f347fc3fda6b3f4add0b355981cd7758vboxsync