| 1 | /* $Id: RTPathAbsDup.cpp 78048 2019-04-09 01:21:09Z vboxsync $ */
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| 2 | /** @file
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| 3 | * IPRT - RTPathAbsDup
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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.alldomusa.eu.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 |
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| 34 | #include <iprt/err.h>
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| 35 | #include <iprt/param.h>
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| 36 | #include <iprt/string.h>
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| 37 |
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| 38 |
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| 39 | /**
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| 40 | * Same as RTPathAbs only the result is RTStrDup()'ed.
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| 41 | *
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| 42 | * @returns Pointer to real path. Use RTStrFree() to free this string.
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| 43 | * @returns NULL if RTPathAbs() or RTStrDup() fails.
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| 44 | * @param pszPath The path to resolve.
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| 45 | */
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| 46 | RTDECL(char *) RTPathAbsDup(const char *pszPath)
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| 47 | {
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| 48 | /* Try with a static buffer first. */
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| 49 | char szPath[RTPATH_MAX];
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| 50 | int rc = RTPathAbs(pszPath, szPath, sizeof(szPath));
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| 51 | if (RT_SUCCESS(rc))
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| 52 | return RTStrDup(szPath);
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| 53 |
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| 54 | /* If it looks like we ran out of buffer space, double the size until
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| 55 | we reach 64 KB. */
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| 56 | if (rc == VERR_FILENAME_TOO_LONG || rc == VERR_BUFFER_OVERFLOW)
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| 57 | {
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| 58 | size_t cbBuf = RTPATH_MAX;
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| 59 | do
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| 60 | {
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| 61 | cbBuf *= 2;
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| 62 | char *pszBuf = RTStrAlloc(cbBuf);
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| 63 | if (!pszBuf)
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| 64 | break;
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| 65 | rc = RTPathAbs(pszPath, pszBuf, cbBuf);
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| 66 | if (RT_SUCCESS(rc))
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| 67 | return pszBuf;
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| 68 | RTStrFree(pszBuf);
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| 69 | } while (cbBuf <= _32K);
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| 70 | }
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| 71 | return NULL;
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| 72 | }
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| 73 |
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