| 1 | /* $Id: RTRmDir.cpp 82968 2020-02-04 10:35:17Z vboxsync $ */
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| 2 | /** @file
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| 3 | * IPRT - Removes directory.
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| 4 | */
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| 5 |
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| 6 | /*
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| 7 | * Copyright (C) 2013-2020 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 <iprt/path.h>
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| 32 | #include <iprt/err.h>
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| 33 | #include <iprt/initterm.h>
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| 34 | #include <iprt/message.h>
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| 35 |
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| 36 | #include <iprt/vfs.h>
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| 37 | #include <iprt/string.h>
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| 38 | #include <iprt/stream.h>
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| 39 | #include <iprt/getopt.h>
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| 40 | #include <iprt/buildconfig.h>
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| 41 |
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| 42 |
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| 43 | /*********************************************************************************************************************************
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| 44 | * Structures and Typedefs *
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| 45 | *********************************************************************************************************************************/
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| 46 | typedef struct RTCMDRMDIROPTS
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| 47 | {
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| 48 | /** -v, --verbose */
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| 49 | bool fVerbose;
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| 50 | /** -p, --parents */
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| 51 | bool fParents;
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| 52 | /** Don't fail if directories that aren't empty. */
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| 53 | bool fIgnoreNotEmpty;
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| 54 | /** Don't fail a directory doesn't exist (i.e. has already been removed). */
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| 55 | bool fIgnoreNonExisting;
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| 56 | /** Whether to always use the VFS chain API (for testing). */
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| 57 | bool fAlwaysUseChainApi;
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| 58 | } RTCMDRMDIROPTS;
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| 59 |
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| 60 |
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| 61 | /**
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| 62 | * Create one directory and any missing parent directories.
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| 63 | *
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| 64 | * @returns exit code
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| 65 | * @param pOpts The mkdir option.
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| 66 | * @param pszDir The path to the new directory.
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| 67 | */
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| 68 | static int rtCmdRmDirOneWithParents(RTCMDRMDIROPTS const *pOpts, const char *pszDir)
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| 69 | {
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| 70 | /* We need a copy we can work with here. */
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| 71 | char *pszCopy = RTStrDup(pszDir);
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| 72 | if (!pszCopy)
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| 73 | return RTMsgErrorExitFailure("Out of string memory!");
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| 74 |
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| 75 | int rc;
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| 76 | if (!pOpts->fAlwaysUseChainApi && !RTVfsChainIsSpec(pszDir) )
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| 77 | {
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| 78 | size_t cchCopy = strlen(pszCopy);
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| 79 | do
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| 80 | {
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| 81 | rc = RTDirRemove(pszCopy);
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| 82 | if (RT_SUCCESS(rc))
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| 83 | {
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| 84 | if (pOpts->fVerbose)
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| 85 | RTPrintf("%s\n", pszCopy);
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| 86 | }
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| 87 | else if ((rc == VERR_PATH_NOT_FOUND || rc == VERR_FILE_NOT_FOUND) && pOpts->fIgnoreNonExisting)
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| 88 | rc = VINF_SUCCESS;
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| 89 | else
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| 90 | {
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| 91 | if ((rc == VERR_DIR_NOT_EMPTY || rc == VERR_SHARING_VIOLATION) && pOpts->fIgnoreNotEmpty)
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| 92 | rc = VINF_SUCCESS;
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| 93 | else
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| 94 | RTMsgError("Failed to remove directory '%s': %Rrc", pszCopy, rc);
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| 95 | break;
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| 96 | }
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| 97 |
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| 98 | /* Strip off a component. */
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| 99 | while (cchCopy > 0 && RTPATH_IS_SLASH(pszCopy[cchCopy - 1]))
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| 100 | cchCopy--;
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| 101 | while (cchCopy > 0 && !RTPATH_IS_SLASH(pszCopy[cchCopy - 1]))
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| 102 | cchCopy--;
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| 103 | while (cchCopy > 0 && RTPATH_IS_SLASH(pszCopy[cchCopy - 1]))
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| 104 | cchCopy--;
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| 105 | pszCopy[cchCopy] = '\0';
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| 106 | } while (cchCopy > 0);
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| 107 | }
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| 108 | else
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| 109 | {
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| 110 | /*
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| 111 | * Strip the final path element from the pszDir spec.
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| 112 | */
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| 113 | char *pszFinalPath;
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| 114 | char *pszSpec;
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| 115 | uint32_t offError;
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| 116 | rc = RTVfsChainSplitOffFinalPath(pszCopy, &pszSpec, &pszFinalPath, &offError);
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| 117 | if (RT_SUCCESS(rc))
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| 118 | {
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| 119 | /*
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| 120 | * Open the root director/whatever.
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| 121 | */
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| 122 | RTERRINFOSTATIC ErrInfo;
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| 123 | RTVFSDIR hVfsBaseDir;
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| 124 | if (pszSpec)
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| 125 | {
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| 126 | rc = RTVfsChainOpenDir(pszSpec, 0 /*fOpen*/, &hVfsBaseDir, &offError, RTErrInfoInitStatic(&ErrInfo));
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| 127 | if (RT_FAILURE(rc))
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| 128 | RTVfsChainMsgError("RTVfsChainOpenDir", pszSpec, rc, offError, &ErrInfo.Core);
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| 129 | else if (!pszFinalPath)
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| 130 | pszFinalPath = RTStrEnd(pszSpec, RTSTR_MAX);
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| 131 | }
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| 132 | else if (!RTPathStartsWithRoot(pszFinalPath))
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| 133 | {
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| 134 | rc = RTVfsDirOpenNormal(".", 0 /*fOpen*/, &hVfsBaseDir);
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| 135 | if (RT_FAILURE(rc))
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| 136 | RTMsgError("Failed to open '.' (for %s): %Rrc", rc, pszFinalPath);
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| 137 | }
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| 138 | else
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| 139 | {
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| 140 | char *pszRoot = pszFinalPath;
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| 141 | pszFinalPath = RTPathSkipRootSpec(pszFinalPath);
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| 142 | char const chSaved = *pszFinalPath;
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| 143 | *pszFinalPath = '\0';
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| 144 | rc = RTVfsDirOpenNormal(pszRoot, 0 /*fOpen*/, &hVfsBaseDir);
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| 145 | *pszFinalPath = chSaved;
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| 146 | if (RT_FAILURE(rc))
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| 147 | RTMsgError("Failed to open root dir for '%s': %Rrc", rc, pszRoot);
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| 148 | }
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| 149 |
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| 150 | /*
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| 151 | * Walk the path component by component, starting at the end.
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| 152 | */
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| 153 | if (RT_SUCCESS(rc))
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| 154 | {
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| 155 | size_t cchFinalPath = strlen(pszFinalPath);
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| 156 | while (RT_SUCCESS(rc) && cchFinalPath > 0)
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| 157 | {
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| 158 | rc = RTVfsDirRemoveDir(hVfsBaseDir, pszFinalPath, 0 /*fFlags*/);
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| 159 | if (RT_SUCCESS(rc))
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| 160 | {
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| 161 | if (pOpts->fVerbose)
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| 162 | RTPrintf("%s\n", pszCopy);
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| 163 | }
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| 164 | else if ((rc == VERR_PATH_NOT_FOUND || rc == VERR_FILE_NOT_FOUND) && pOpts->fIgnoreNonExisting)
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| 165 | rc = VINF_SUCCESS;
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| 166 | else
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| 167 | {
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| 168 | if ((rc == VERR_DIR_NOT_EMPTY || rc == VERR_SHARING_VIOLATION) && pOpts->fIgnoreNotEmpty)
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| 169 | rc = VINF_SUCCESS;
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| 170 | else if (pszSpec)
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| 171 | RTMsgError("Failed to remove directory '%s:%s': %Rrc", pszSpec, pszFinalPath, rc);
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| 172 | else
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| 173 | RTMsgError("Failed to remove directory '%s': %Rrc", pszFinalPath, rc);
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| 174 | break;
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| 175 | }
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| 176 |
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| 177 | /* Strip off a component. */
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| 178 | while (cchFinalPath > 0 && RTPATH_IS_SLASH(pszFinalPath[cchFinalPath - 1]))
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| 179 | cchFinalPath--;
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| 180 | while (cchFinalPath > 0 && !RTPATH_IS_SLASH(pszFinalPath[cchFinalPath - 1]))
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| 181 | cchFinalPath--;
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| 182 | while (cchFinalPath > 0 && RTPATH_IS_SLASH(pszFinalPath[cchFinalPath - 1]))
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| 183 | cchFinalPath--;
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| 184 | pszFinalPath[cchFinalPath] = '\0';
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| 185 | }
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| 186 |
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| 187 | RTVfsDirRelease(hVfsBaseDir);
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| 188 | }
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| 189 | }
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| 190 | else
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| 191 | RTVfsChainMsgError("RTVfsChainOpenParentDir", pszCopy, rc, offError, NULL);
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| 192 | }
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| 193 | RTStrFree(pszCopy);
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| 194 | return RT_SUCCESS(rc) ? RTEXITCODE_SUCCESS : RTEXITCODE_FAILURE;
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| 195 | }
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| 196 |
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| 197 |
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| 198 | /**
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| 199 | * Removes one directory.
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| 200 | *
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| 201 | * @returns exit code
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| 202 | * @param pOpts The mkdir option.
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| 203 | * @param pszDir The path to the new directory.
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| 204 | */
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| 205 | static RTEXITCODE rtCmdRmDirOne(RTCMDRMDIROPTS const *pOpts, const char *pszDir)
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| 206 | {
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| 207 | int rc;
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| 208 | if (!pOpts->fAlwaysUseChainApi && !RTVfsChainIsSpec(pszDir) )
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| 209 | rc = RTDirRemove(pszDir);
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| 210 | else
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| 211 | {
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| 212 | RTVFSDIR hVfsDir;
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| 213 | const char *pszChild;
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| 214 | uint32_t offError;
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| 215 | RTERRINFOSTATIC ErrInfo;
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| 216 | rc = RTVfsChainOpenParentDir(pszDir, 0 /*fOpen*/, &hVfsDir, &pszChild, &offError, RTErrInfoInitStatic(&ErrInfo));
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| 217 | if (RT_SUCCESS(rc))
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| 218 | {
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| 219 | rc = RTVfsDirRemoveDir(hVfsDir, pszChild, 0 /*fFlags*/);
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| 220 | RTVfsDirRelease(hVfsDir);
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| 221 | }
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| 222 | else
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| 223 | return RTVfsChainMsgErrorExitFailure("RTVfsChainOpenParentDir", pszDir, rc, offError, &ErrInfo.Core);
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| 224 | }
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| 225 | if (RT_SUCCESS(rc))
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| 226 | {
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| 227 | if (pOpts->fVerbose)
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| 228 | RTPrintf("%s\n", pszDir);
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| 229 | return RTEXITCODE_SUCCESS;
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| 230 | }
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| 231 | if ((rc == VERR_DIR_NOT_EMPTY || rc == VERR_SHARING_VIOLATION) && pOpts->fIgnoreNotEmpty)
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| 232 | return RTEXITCODE_SUCCESS; /** @todo be verbose about this? */
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| 233 | if ((rc == VERR_PATH_NOT_FOUND || rc == VERR_FILE_NOT_FOUND) && pOpts->fIgnoreNonExisting)
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| 234 | return RTEXITCODE_SUCCESS; /** @todo be verbose about this? */
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| 235 | return RTMsgErrorExitFailure("Failed to remove '%s': %Rrc", pszDir, rc);
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| 236 | }
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| 237 |
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| 238 |
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| 239 | static RTEXITCODE RTCmdRmDir(unsigned cArgs, char **papszArgs)
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| 240 | {
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| 241 | /*
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| 242 | * Parse the command line.
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| 243 | */
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| 244 | static const RTGETOPTDEF s_aOptions[] =
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| 245 | {
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| 246 | /* operations */
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| 247 | { "--parents", 'p', RTGETOPT_REQ_NOTHING },
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| 248 | { "--ignore-fail-on-non-empty", 'F', RTGETOPT_REQ_NOTHING },
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| 249 | { "--ignore-non-existing", 'E', RTGETOPT_REQ_NOTHING },
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| 250 | { "--always-use-vfs-chain-api", 'A', RTGETOPT_REQ_NOTHING },
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| 251 | { "--verbose", 'v', RTGETOPT_REQ_NOTHING },
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| 252 | };
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| 253 |
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| 254 | RTGETOPTSTATE GetState;
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| 255 | int rc = RTGetOptInit(&GetState, cArgs, papszArgs, s_aOptions, RT_ELEMENTS(s_aOptions), 1,
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| 256 | RTGETOPTINIT_FLAGS_OPTS_FIRST);
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| 257 | if (RT_FAILURE(rc))
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| 258 | return RTMsgErrorExit(RTEXITCODE_FAILURE, "RTGetOpt failed: %Rrc", rc);
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| 259 |
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| 260 | RTCMDRMDIROPTS Opts;
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| 261 | Opts.fVerbose = false;
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| 262 | Opts.fParents = false;
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| 263 | Opts.fIgnoreNotEmpty = false;
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| 264 | Opts.fIgnoreNonExisting = false;
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| 265 | Opts.fAlwaysUseChainApi = false;
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| 266 |
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| 267 | RTGETOPTUNION ValueUnion;
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| 268 | while ( (rc = RTGetOpt(&GetState, &ValueUnion)) != 0
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| 269 | && rc != VINF_GETOPT_NOT_OPTION)
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| 270 | {
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| 271 | switch (rc)
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| 272 | {
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| 273 | case 'p':
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| 274 | Opts.fParents = true;
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| 275 | break;
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| 276 |
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| 277 | case 'v':
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| 278 | Opts.fVerbose = true;
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| 279 | break;
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| 280 |
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| 281 | case 'A':
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| 282 | Opts.fAlwaysUseChainApi = true;
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| 283 | break;
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| 284 |
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| 285 | case 'E':
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| 286 | Opts.fIgnoreNonExisting = true;
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| 287 | break;
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| 288 |
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| 289 | case 'F':
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| 290 | Opts.fIgnoreNotEmpty = true;
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| 291 | break;
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| 292 |
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| 293 | case 'h':
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| 294 | RTPrintf("Usage: %s [options] <dir> [..]\n"
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| 295 | "\n"
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| 296 | "Removes empty directories.\n"
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| 297 | "\n"
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| 298 | "Options:\n"
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| 299 | " -p, --parent\n"
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| 300 | " Remove specified parent directories too.\n"
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| 301 | " -F, --ignore-fail-on-non-empty\n"
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| 302 | " Do not fail if a directory is not empty, just ignore it.\n"
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| 303 | " This is really handy with the -p option.\n"
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| 304 | " -E, --ignore-non-existing\n"
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| 305 | " Do not fail if a specified directory is not there.\n"
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| 306 | " -v, --verbose\n"
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| 307 | " Tell which directories get remove.\n"
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| 308 | " -A, --always-use-vfs-chain-api\n"
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| 309 | " Always use the VFS API.\n"
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| 310 | , papszArgs[0]);
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| 311 | return RTEXITCODE_SUCCESS;
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| 312 |
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| 313 | case 'V':
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| 314 | RTPrintf("%sr%d\n", RTBldCfgVersion(), RTBldCfgRevision());
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| 315 | return RTEXITCODE_SUCCESS;
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| 316 |
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| 317 | default:
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| 318 | return RTGetOptPrintError(rc, &ValueUnion);
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| 319 | }
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| 320 | }
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| 321 |
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| 322 |
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| 323 | /*
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| 324 | * No files means error.
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| 325 | */
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| 326 | if (rc != VINF_GETOPT_NOT_OPTION)
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| 327 | return RTMsgErrorExit(RTEXITCODE_FAILURE, "No directories specified.\n");
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| 328 |
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| 329 | /*
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| 330 | * Work thru the specified dirs.
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| 331 | */
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| 332 | RTEXITCODE rcExit = RTEXITCODE_SUCCESS;
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| 333 | while (rc == VINF_GETOPT_NOT_OPTION)
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| 334 | {
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| 335 | if (Opts.fParents)
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| 336 | rc = rtCmdRmDirOneWithParents(&Opts, ValueUnion.psz);
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| 337 | else
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| 338 | rc = rtCmdRmDirOne(&Opts, ValueUnion.psz);
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| 339 | if (RT_FAILURE(rc))
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| 340 | rcExit = RTEXITCODE_FAILURE;
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| 341 |
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| 342 | /* next */
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| 343 | rc = RTGetOpt(&GetState, &ValueUnion);
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| 344 | }
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| 345 | if (rc != 0)
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| 346 | rcExit = RTGetOptPrintError(rc, &ValueUnion);
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| 347 |
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| 348 | return rcExit;
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| 349 | }
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| 350 |
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| 351 |
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| 352 | int main(int argc, char **argv)
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| 353 | {
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| 354 | int rc = RTR3InitExe(argc, &argv, 0);
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| 355 | if (RT_FAILURE(rc))
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| 356 | return RTMsgInitFailure(rc);
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| 357 | return RTCmdRmDir(argc, argv);
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| 358 | }
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| 359 |
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