| 1 | /* $Id: RTPathAbsExDup.cpp 78090 2019-04-10 14:19:04Z vboxsync $ */
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| 2 | /** @file
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| 3 | * IPRT - RTPathAbsExDup
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| 4 | */
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| 5 |
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| 6 | /*
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| 7 | * Copyright (C) 2006-2019 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/errcore.h>
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| 34 | #include <iprt/param.h>
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| 35 | #include <iprt/string.h>
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| 36 |
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| 37 |
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| 38 |
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| 39 | /**
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| 40 | * Same as RTPathAbsEx only the result is RTStrDup()'ed.
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| 41 | *
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| 42 | * @returns Pointer to the absolute path. Use RTStrFree() to free this string.
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| 43 | * @returns NULL if RTPathAbsEx() or RTStrDup() fails.
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| 44 | * @param pszBase The base path to act like a current directory.
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| 45 | * When NULL, the actual cwd is used (i.e. the call
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| 46 | * is equivalent to RTPathAbs(pszPath, ...).
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| 47 | * @param pszPath The path to resolve.
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| 48 | */
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| 49 | RTDECL(char *) RTPathAbsExDup(const char *pszBase, const char *pszPath)
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| 50 | {
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| 51 | char szPath[RTPATH_MAX];
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| 52 | size_t cbPath = sizeof(szPath);
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| 53 | int rc = RTPathAbsExEx(pszBase, pszPath, RTPATH_STR_F_STYLE_HOST, szPath, &cbPath);
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| 54 | if (RT_SUCCESS(rc))
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| 55 | return RTStrDup(szPath);
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| 56 |
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| 57 | if (rc == VERR_BUFFER_OVERFLOW)
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| 58 | {
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| 59 | size_t cbPrevPath = sizeof(szPath);
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| 60 | uint32_t cTries = 6;
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| 61 | while (cTries-- > 0)
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| 62 | {
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| 63 | cbPath = RT_MAX(RT_ALIGN_Z(cbPath + 16, 64), cbPrevPath + 256);
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| 64 | cbPrevPath = cbPath;
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| 65 | char *pszAbsPath = (char *)RTStrAlloc(cbPath);
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| 66 | if (pszAbsPath)
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| 67 | {
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| 68 | rc = RTPathAbsExEx(pszBase, pszPath, RTPATH_STR_F_STYLE_HOST, pszAbsPath, &cbPath);
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| 69 | if (RT_SUCCESS(rc))
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| 70 | return pszAbsPath;
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| 71 | RTStrFree(pszAbsPath);
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| 72 | }
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| 73 | else
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| 74 | break;
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| 75 | }
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| 76 | }
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| 77 | return NULL;
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| 78 | }
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| 79 |
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