| 1 | /* $Id: RTPathAbsEx.cpp 69111 2017-10-17 14:26:02Z vboxsync $ */
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| 2 | /** @file
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| 3 | * IPRT - RTPathAbsEx
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| 4 | */
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| 5 |
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| 6 | /*
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| 7 | * Copyright (C) 2006-2017 Oracle Corporation
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| 8 | *
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| 9 | * This file is part of VirtualBox Open Source Edition (OSE), as
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| 10 | * available from http://www.virtualbox.org. This file is free software;
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| 11 | * you can redistribute it and/or modify it under the terms of the GNU
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| 12 | * General Public License (GPL) as published by the Free Software
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| 13 | * Foundation, in version 2 as it comes in the "COPYING" file of the
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| 14 | * VirtualBox OSE distribution. VirtualBox OSE is distributed in the
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| 15 | * hope that it will be useful, but WITHOUT ANY WARRANTY of any kind.
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| 16 | *
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| 17 | * The contents of this file may alternatively be used under the terms
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| 18 | * of the Common Development and Distribution License Version 1.0
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| 19 | * (CDDL) only, as it comes in the "COPYING.CDDL" file of the
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| 20 | * VirtualBox OSE distribution, in which case the provisions of the
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| 21 | * CDDL are applicable instead of those of the GPL.
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| 22 | *
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| 23 | * You may elect to license modified versions of this file under the
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| 24 | * terms and conditions of either the GPL or the CDDL or both.
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| 25 | */
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| 26 |
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| 27 |
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| 28 | /*********************************************************************************************************************************
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| 29 | * Header Files *
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| 30 | *********************************************************************************************************************************/
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| 31 | #include "internal/iprt.h"
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| 32 | #include <iprt/path.h>
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| 33 | #include <iprt/err.h>
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| 34 | #include <iprt/param.h>
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| 35 | #include <iprt/string.h>
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| 36 | #include "internal/path.h"
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| 37 |
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| 38 |
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| 39 |
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| 40 | /**
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| 41 | * Get the absolute path (no symlinks, no . or .. components), assuming the
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| 42 | * given base path as the current directory. The resulting path doesn't have
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| 43 | * to exist.
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| 44 | *
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| 45 | * @returns iprt status code.
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| 46 | * @param pszBase The base path to act like a current directory.
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| 47 | * When NULL, the actual cwd is used (i.e. the call
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| 48 | * is equivalent to RTPathAbs(pszPath, ...).
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| 49 | * @param pszPath The path to resolve.
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| 50 | * @param pszAbsPath Where to store the absolute path.
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| 51 | * @param cchAbsPath Size of the buffer.
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| 52 | */
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| 53 | RTDECL(int) RTPathAbsEx(const char *pszBase, const char *pszPath, char *pszAbsPath, size_t cchAbsPath)
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| 54 | {
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| 55 | if ( pszBase
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| 56 | && pszPath
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| 57 | && !rtPathVolumeSpecLen(pszPath)
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| 58 | )
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| 59 | {
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| 60 | #if defined(RT_OS_WINDOWS)
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| 61 | /* The format for very long paths is not supported. */
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| 62 | if ( RTPATH_IS_SLASH(pszBase[0])
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| 63 | && RTPATH_IS_SLASH(pszBase[1])
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| 64 | && pszBase[2] == '?'
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| 65 | && RTPATH_IS_SLASH(pszBase[3])
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| 66 | )
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| 67 | return VERR_INVALID_NAME;
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| 68 | #endif
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| 69 |
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| 70 | /** @todo there are a couple of things which isn't 100% correct, although the
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| 71 | * current code will have to do for now, no time to fix.
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| 72 | *
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| 73 | * 1) On Windows & OS/2 we confuse '/' with an abspath spec and will
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| 74 | * not necessarily resolve it on the right drive.
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| 75 | * 2) A trailing slash in the base might cause UNC names to be created.
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| 76 | */
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| 77 | size_t const cchPath = strlen(pszPath);
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| 78 | char szTmpPath[RTPATH_MAX];
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| 79 | if (RTPATH_IS_SLASH(pszPath[0]))
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| 80 | {
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| 81 | /* join the disk name from base and the path (DOS systems only) */
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| 82 | size_t const cchVolSpec = rtPathVolumeSpecLen(pszBase);
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| 83 | if (cchVolSpec + cchPath + 1 > sizeof(szTmpPath))
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| 84 | return VERR_FILENAME_TOO_LONG;
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| 85 | memcpy(szTmpPath, pszBase, cchVolSpec);
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| 86 | memcpy(&szTmpPath[cchVolSpec], pszPath, cchPath + 1);
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| 87 | }
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| 88 | else
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| 89 | {
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| 90 | /* join the base path and the path */
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| 91 | size_t const cchBase = strlen(pszBase);
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| 92 | if (cchBase + 1 + cchPath + 1 > sizeof(szTmpPath))
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| 93 | return VERR_FILENAME_TOO_LONG;
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| 94 | memcpy(szTmpPath, pszBase, cchBase);
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| 95 | szTmpPath[cchBase] = RTPATH_DELIMITER;
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| 96 | memcpy(&szTmpPath[cchBase + 1], pszPath, cchPath + 1);
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| 97 | }
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| 98 | return RTPathAbs(szTmpPath, pszAbsPath, cchAbsPath);
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| 99 | }
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| 100 |
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| 101 | /* Fallback to the non *Ex version */
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| 102 | return RTPathAbs(pszPath, pszAbsPath, cchAbsPath);
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| 103 | }
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| 104 |
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