| 1 | /* $Id: RTDirCreateTemp-generic.cpp 21337 2009-07-07 14:58:27Z vboxsync $ */
|
|---|
| 2 | /** @file
|
|---|
| 3 | * IPRT - RTDirCreateTemp, generic implementation.
|
|---|
| 4 | */
|
|---|
| 5 |
|
|---|
| 6 | /*
|
|---|
| 7 | * Copyright (C) 2009 Sun Microsystems, Inc.
|
|---|
| 8 | *
|
|---|
| 9 | * This file is part of VirtualBox Open Source Edition (OSE), as
|
|---|
| 10 | * available from http://www.virtualbox.org. This file is free software;
|
|---|
| 11 | * you can redistribute it and/or modify it under the terms of the GNU
|
|---|
| 12 | * General Public License (GPL) as published by the Free Software
|
|---|
| 13 | * Foundation, in version 2 as it comes in the "COPYING" file of the
|
|---|
| 14 | * VirtualBox OSE distribution. VirtualBox OSE is distributed in the
|
|---|
| 15 | * hope that it will be useful, but WITHOUT ANY WARRANTY of any kind.
|
|---|
| 16 | *
|
|---|
| 17 | * The contents of this file may alternatively be used under the terms
|
|---|
| 18 | * of the Common Development and Distribution License Version 1.0
|
|---|
| 19 | * (CDDL) only, as it comes in the "COPYING.CDDL" file of the
|
|---|
| 20 | * VirtualBox OSE distribution, in which case the provisions of the
|
|---|
| 21 | * CDDL are applicable instead of those of the GPL.
|
|---|
| 22 | *
|
|---|
| 23 | * You may elect to license modified versions of this file under the
|
|---|
| 24 | * terms and conditions of either the GPL or the CDDL or both.
|
|---|
| 25 | *
|
|---|
| 26 | * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa
|
|---|
| 27 | * Clara, CA 95054 USA or visit http://www.sun.com if you need
|
|---|
| 28 | * additional information or have any questions.
|
|---|
| 29 | */
|
|---|
| 30 |
|
|---|
| 31 |
|
|---|
| 32 | /*******************************************************************************
|
|---|
| 33 | * Header Files *
|
|---|
| 34 | *******************************************************************************/
|
|---|
| 35 | #include <iprt/dir.h>
|
|---|
| 36 | #include "internal/iprt.h"
|
|---|
| 37 |
|
|---|
| 38 | #include <iprt/assert.h>
|
|---|
| 39 | #include <iprt/err.h>
|
|---|
| 40 | #include <iprt/path.h>
|
|---|
| 41 | #include <iprt/rand.h>
|
|---|
| 42 | #include <iprt/string.h>
|
|---|
| 43 |
|
|---|
| 44 |
|
|---|
| 45 | RTDECL(int) RTDirCreateTemp(char *pszTemplate)
|
|---|
| 46 | {
|
|---|
| 47 | /*
|
|---|
| 48 | * Validate input and count X'es.
|
|---|
| 49 | *
|
|---|
| 50 | * The X'es may be trailing, or they may be a cluster of 3 or more inside
|
|---|
| 51 | * the file name.
|
|---|
| 52 | */
|
|---|
| 53 | AssertPtr(pszTemplate);
|
|---|
| 54 | unsigned cXes = 0;
|
|---|
| 55 | char *pszX = strchr(pszTemplate, '\0');
|
|---|
| 56 | if ( pszX != pszTemplate
|
|---|
| 57 | && pszX[-1] != 'X')
|
|---|
| 58 | {
|
|---|
| 59 | /* look inside the file name. */
|
|---|
| 60 | char *pszFilename = RTPathFilename(pszTemplate);
|
|---|
| 61 | if ( pszFilename
|
|---|
| 62 | && (size_t)(pszX - pszFilename) > 3)
|
|---|
| 63 | {
|
|---|
| 64 | char *pszXEnd = pszX - 1;
|
|---|
| 65 | pszFilename += 3;
|
|---|
| 66 | do
|
|---|
| 67 | {
|
|---|
| 68 | if ( pszXEnd[-1] == 'X'
|
|---|
| 69 | && pszXEnd[-2] == 'X'
|
|---|
| 70 | && pszXEnd[-3] == 'X')
|
|---|
| 71 | {
|
|---|
| 72 | pszX = pszXEnd - 3;
|
|---|
| 73 | cXes = 3;
|
|---|
| 74 | break;
|
|---|
| 75 | }
|
|---|
| 76 | } while (pszXEnd-- != pszFilename);
|
|---|
| 77 | }
|
|---|
| 78 | }
|
|---|
| 79 |
|
|---|
| 80 | /* count them */
|
|---|
| 81 | while ( pszX != pszTemplate
|
|---|
| 82 | && pszX[-1] == 'X')
|
|---|
| 83 | {
|
|---|
| 84 | pszX--;
|
|---|
| 85 | cXes++;
|
|---|
| 86 | }
|
|---|
| 87 |
|
|---|
| 88 | /* fail if none found. */
|
|---|
| 89 | if (!cXes)
|
|---|
| 90 | {
|
|---|
| 91 | AssertFailed();
|
|---|
| 92 | *pszTemplate = '\0';
|
|---|
| 93 | return VERR_INVALID_PARAMETER;
|
|---|
| 94 | }
|
|---|
| 95 |
|
|---|
| 96 | /*
|
|---|
| 97 | * Try ten thousand times.
|
|---|
| 98 | */
|
|---|
| 99 | int i = 10000;
|
|---|
| 100 | while (i-- > 0)
|
|---|
| 101 | {
|
|---|
| 102 | static char const s_sz[] = "0123456789abcdefghijklmnopqrstuvwxyz";
|
|---|
| 103 | unsigned j = cXes;
|
|---|
| 104 | while (j-- > 0)
|
|---|
| 105 | pszX[j] = s_sz[RTRandU32Ex(0, RT_ELEMENTS(s_sz) - 2)];
|
|---|
| 106 | int rc = RTDirCreate(pszTemplate, 0700);
|
|---|
| 107 | if (RT_SUCCESS(rc))
|
|---|
| 108 | return rc;
|
|---|
| 109 | if (rc != VERR_ALREADY_EXISTS)
|
|---|
| 110 | {
|
|---|
| 111 | *pszTemplate = '\0';
|
|---|
| 112 | return rc;
|
|---|
| 113 | }
|
|---|
| 114 | }
|
|---|
| 115 |
|
|---|
| 116 | /* we've given up. */
|
|---|
| 117 | *pszTemplate = '\0';
|
|---|
| 118 | return VERR_ALREADY_EXISTS;
|
|---|
| 119 | }
|
|---|
| 120 | RT_EXPORT_SYMBOL(RTDirCreateTemp);
|
|---|
| 121 |
|
|---|
