| 1 | /* $Id: dir2.cpp 96407 2022-08-22 17:43:14Z vboxsync $ */
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| 2 | /** @file
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| 3 | * IPRT - Directory Manipulation, Part 2.
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| 4 | */
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| 5 |
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| 6 | /*
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| 7 | * Copyright (C) 2006-2022 Oracle and/or its affiliates.
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| 8 | *
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| 9 | * This file is part of VirtualBox base platform packages, as
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| 10 | * available from https://www.virtualbox.org.
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| 11 | *
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| 12 | * This program is free software; you can redistribute it and/or
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| 13 | * modify it under the terms of the GNU General Public License
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| 14 | * as published by the Free Software Foundation, in version 3 of the
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| 15 | * License.
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| 16 | *
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| 17 | * This program is distributed in the hope that it will be useful, but
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| 18 | * WITHOUT ANY WARRANTY; without even the implied warranty of
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| 19 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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| 20 | * General Public License for more details.
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| 21 | *
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| 22 | * You should have received a copy of the GNU General Public License
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| 23 | * along with this program; if not, see <https://www.gnu.org/licenses>.
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| 24 | *
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| 25 | * The contents of this file may alternatively be used under the terms
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| 26 | * of the Common Development and Distribution License Version 1.0
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| 27 | * (CDDL), a copy of it is provided in the "COPYING.CDDL" file included
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| 28 | * in the VirtualBox distribution, in which case the provisions of the
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| 29 | * CDDL are applicable instead of those of the GPL.
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| 30 | *
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| 31 | * You may elect to license modified versions of this file under the
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| 32 | * terms and conditions of either the GPL or the CDDL or both.
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| 33 | *
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| 34 | * SPDX-License-Identifier: GPL-3.0-only OR CDDL-1.0
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| 35 | */
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| 36 |
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| 37 |
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| 38 | /*********************************************************************************************************************************
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| 39 | * Header Files *
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| 40 | *********************************************************************************************************************************/
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| 41 | #define LOG_GROUP RTLOGGROUP_DIR
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| 42 | #include <iprt/dir.h>
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| 43 | #include "internal/iprt.h"
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| 44 |
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| 45 | #include <iprt/alloca.h>
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| 46 | #include <iprt/assert.h>
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| 47 | #include <iprt/file.h>
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| 48 | #include <iprt/err.h>
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| 49 | #include <iprt/log.h>
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| 50 | #include <iprt/mem.h>
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| 51 | #include <iprt/param.h>
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| 52 | #include <iprt/path.h>
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| 53 | #include <iprt/string.h>
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| 54 | #include "internal/path.h"
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| 55 |
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| 56 |
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| 57 | /**
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| 58 | * Recursion worker for RTDirRemoveRecursive.
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| 59 | *
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| 60 | * @returns IPRT status code.
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| 61 | * @param pszBuf The path buffer. Contains the abs path to the
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| 62 | * directory to recurse into. Trailing slash.
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| 63 | * @param cchDir The length of the directory we're recursing into,
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| 64 | * including the trailing slash.
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| 65 | * @param cbBuf Size of the buffer @a pszBuf points to.
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| 66 | * @param pDirEntry The dir entry buffer. (Shared to save stack.)
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| 67 | * @param pObjInfo The object info buffer. (ditto)
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| 68 | * @param fFlags RTDIRRMREC_F_XXX.
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| 69 | */
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| 70 | static int rtDirRemoveRecursiveSub(char *pszBuf, size_t cchDir, size_t cbBuf, PRTDIRENTRY pDirEntry, PRTFSOBJINFO pObjInfo,
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| 71 | uint32_t fFlags)
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| 72 | {
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| 73 | AssertReturn(RTPATH_IS_SLASH(pszBuf[cchDir - 1]), VERR_INTERNAL_ERROR_4);
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| 74 |
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| 75 | /*
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| 76 | * Enumerate the directory content and dispose of it.
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| 77 | */
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| 78 | RTDIR hDir;
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| 79 | int rc = RTDirOpenFiltered(&hDir, pszBuf, RTDIRFILTER_NONE, fFlags & RTDIRRMREC_F_NO_ABS_PATH ? RTDIR_F_NO_ABS_PATH : 0);
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| 80 | if (RT_FAILURE(rc))
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| 81 | return rc;
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| 82 | while (RT_SUCCESS(rc = RTDirRead(hDir, pDirEntry, NULL)))
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| 83 | {
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| 84 | if (!RTDirEntryIsStdDotLink(pDirEntry))
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| 85 | {
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| 86 | /* Construct the full name of the entry. */
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| 87 | if (cchDir + pDirEntry->cbName + 1 /* dir slash */ >= cbBuf)
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| 88 | {
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| 89 | rc = VERR_FILENAME_TOO_LONG;
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| 90 | break;
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| 91 | }
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| 92 | memcpy(&pszBuf[cchDir], pDirEntry->szName, pDirEntry->cbName + 1);
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| 93 |
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| 94 | /* Deal with the unknown type. */
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| 95 | if (pDirEntry->enmType == RTDIRENTRYTYPE_UNKNOWN)
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| 96 | {
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| 97 | rc = RTPathQueryInfoEx(pszBuf, pObjInfo, RTFSOBJATTRADD_NOTHING, RTPATH_F_ON_LINK);
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| 98 | if (RT_SUCCESS(rc) && RTFS_IS_DIRECTORY(pObjInfo->Attr.fMode))
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| 99 | pDirEntry->enmType = RTDIRENTRYTYPE_DIRECTORY;
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| 100 | else if (RT_SUCCESS(rc) && RTFS_IS_FILE(pObjInfo->Attr.fMode))
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| 101 | pDirEntry->enmType = RTDIRENTRYTYPE_FILE;
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| 102 | else if (RT_SUCCESS(rc) && RTFS_IS_SYMLINK(pObjInfo->Attr.fMode))
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| 103 | pDirEntry->enmType = RTDIRENTRYTYPE_SYMLINK;
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| 104 | }
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| 105 |
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| 106 | /* Try the delete the fs object. */
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| 107 | switch (pDirEntry->enmType)
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| 108 | {
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| 109 | case RTDIRENTRYTYPE_FILE:
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| 110 | rc = RTFileDelete(pszBuf);
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| 111 | break;
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| 112 |
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| 113 | case RTDIRENTRYTYPE_DIRECTORY:
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| 114 | {
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| 115 | size_t cchSubDir = cchDir + pDirEntry->cbName;
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| 116 | pszBuf[cchSubDir++] = '/';
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| 117 | pszBuf[cchSubDir] = '\0';
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| 118 | rc = rtDirRemoveRecursiveSub(pszBuf, cchSubDir, cbBuf, pDirEntry, pObjInfo, fFlags);
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| 119 | if (RT_SUCCESS(rc))
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| 120 | {
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| 121 | pszBuf[cchSubDir] = '\0';
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| 122 | rc = RTDirRemove(pszBuf);
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| 123 | }
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| 124 | break;
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| 125 | }
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| 126 |
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| 127 | //case RTDIRENTRYTYPE_SYMLINK:
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| 128 | // rc = RTSymlinkDelete(pszBuf, 0);
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| 129 | // break;
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| 130 |
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| 131 | default:
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| 132 | /** @todo not implemented yet. */
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| 133 | rc = VINF_SUCCESS;
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| 134 | break;
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| 135 | }
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| 136 | if (RT_FAILURE(rc))
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| 137 | break;
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| 138 | }
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| 139 | }
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| 140 | if (rc == VERR_NO_MORE_FILES)
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| 141 | rc = VINF_SUCCESS;
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| 142 | RTDirClose(hDir);
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| 143 | return rc;
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| 144 | }
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| 145 |
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| 146 |
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| 147 | RTDECL(int) RTDirRemoveRecursive(const char *pszPath, uint32_t fFlags)
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| 148 | {
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| 149 | AssertReturn(!(fFlags & ~RTDIRRMREC_F_VALID_MASK), VERR_INVALID_PARAMETER);
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| 150 |
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| 151 | /*
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| 152 | * Allocate path buffer.
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| 153 | */
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| 154 | char *pszAbsPath;
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| 155 | size_t cbAbsPathBuf = RTPATH_BIG_MAX;
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| 156 | char *pszAbsPathFree = pszAbsPath = (char *)RTMemTmpAlloc(cbAbsPathBuf);
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| 157 | if (!pszAbsPath)
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| 158 | {
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| 159 | cbAbsPathBuf = RTPATH_MAX;
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| 160 | pszAbsPath = (char *)alloca(RTPATH_MAX);
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| 161 | }
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| 162 |
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| 163 | /*
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| 164 | * Get an absolute path because this is easier to work with and
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| 165 | * eliminates any races with changing CWD.
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| 166 | */
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| 167 | int rc;
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| 168 | if (!(fFlags & RTDIRRMREC_F_NO_ABS_PATH))
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| 169 | rc = RTPathAbs(pszPath, pszAbsPath, cbAbsPathBuf);
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| 170 | else if (*pszPath != '\0')
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| 171 | rc = RTStrCopy(pszAbsPath, cbAbsPathBuf, pszPath);
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| 172 | else
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| 173 | rc = VERR_PATH_ZERO_LENGTH;
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| 174 | if (RT_SUCCESS(rc))
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| 175 | {
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| 176 | /*
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| 177 | * This API is not permitted applied to the root of anything.
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| 178 | */
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| 179 | union
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| 180 | {
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| 181 | RTPATHPARSED Parsed;
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| 182 | uint8_t abParsed[RTPATHPARSED_MIN_SIZE];
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| 183 | } uBuf;
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| 184 | RTPathParse(pszPath, &uBuf.Parsed, sizeof(uBuf), RTPATH_STR_F_STYLE_HOST);
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| 185 | if ( uBuf.Parsed.cComps <= 1
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| 186 | && (uBuf.Parsed.fProps & RTPATH_PROP_ROOT_SLASH))
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| 187 | rc = VERR_ACCESS_DENIED;
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| 188 | else
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| 189 | {
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| 190 | /*
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| 191 | * Because of the above restriction, we never have to deal with the root
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| 192 | * slash problem and can safely strip any trailing slashes and add a
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| 193 | * definite one.
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| 194 | */
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| 195 | RTPathStripTrailingSlash(pszAbsPath);
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| 196 | size_t cchAbsPath = strlen(pszAbsPath);
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| 197 | if (cchAbsPath + 1 < cbAbsPathBuf)
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| 198 | {
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| 199 | pszAbsPath[cchAbsPath++] = RTPATH_SLASH;
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| 200 | pszAbsPath[cchAbsPath] = '\0';
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| 201 |
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| 202 | /*
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| 203 | * Check if it exists so we can return quietly if it doesn't.
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| 204 | */
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| 205 | RTFSOBJINFO SharedObjInfoBuf;
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| 206 | rc = RTPathQueryInfoEx(pszAbsPath, &SharedObjInfoBuf, RTFSOBJATTRADD_NOTHING, RTPATH_F_ON_LINK);
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| 207 | if ( rc == VERR_PATH_NOT_FOUND
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| 208 | || rc == VERR_FILE_NOT_FOUND)
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| 209 | rc = VINF_SUCCESS;
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| 210 | else if ( RT_SUCCESS(rc)
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| 211 | && RTFS_IS_DIRECTORY(SharedObjInfoBuf.Attr.fMode))
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| 212 | {
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| 213 | /*
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| 214 | * We're all set for the recursion now, so get going.
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| 215 | */
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| 216 | RTDIRENTRY SharedDirEntryBuf;
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| 217 | rc = rtDirRemoveRecursiveSub(pszAbsPath, cchAbsPath, cbAbsPathBuf,
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| 218 | &SharedDirEntryBuf, &SharedObjInfoBuf, fFlags);
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| 219 |
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| 220 | /*
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| 221 | * Remove the specified directory if desired and removing the content was successful.
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| 222 | */
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| 223 | if ( RT_SUCCESS(rc)
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| 224 | && !(fFlags & RTDIRRMREC_F_CONTENT_ONLY))
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| 225 | {
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| 226 | pszAbsPath[cchAbsPath] = 0;
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| 227 | rc = RTDirRemove(pszAbsPath);
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| 228 | }
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| 229 | }
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| 230 | else if (RT_SUCCESS(rc))
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| 231 | rc = VERR_NOT_A_DIRECTORY;
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| 232 |
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| 233 | }
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| 234 | else
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| 235 | rc = VERR_FILENAME_TOO_LONG;
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| 236 | }
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| 237 | }
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| 238 | if (pszAbsPathFree)
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| 239 | RTMemTmpFree(pszAbsPathFree);
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| 240 | return rc;
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| 241 | }
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| 242 |
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