| 1 | /* $Id: fs.cpp 19171 2009-04-24 15:35:54Z vboxsync $ */
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| 2 | /** @file
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| 3 | * IPRT - File System.
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| 4 | */
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| 5 |
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| 6 | /*
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| 7 | * Copyright (C) 2006-2007 Sun Microsystems, Inc.
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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 | * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa
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| 27 | * Clara, CA 95054 USA or visit http://www.sun.com if you need
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| 28 | * additional information or have any questions.
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| 29 | */
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| 30 |
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| 31 |
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| 32 | /*******************************************************************************
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| 33 | * Header Files *
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| 34 | *******************************************************************************/
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| 35 | #ifndef RT_OS_WINDOWS
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| 36 | # define RTTIME_INCL_TIMESPEC
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| 37 | # include <sys/time.h>
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| 38 | #endif
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| 39 |
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| 40 | #include <iprt/fs.h>
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| 41 | #include <iprt/assert.h>
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| 42 | #include <iprt/time.h>
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| 43 | #include <iprt/string.h>
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| 44 | #include <iprt/path.h>
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| 45 | #include <iprt/ctype.h>
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| 46 | #include "internal/fs.h"
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| 47 |
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| 48 |
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| 49 | /**
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| 50 | * Converts dos-style attributes to Unix attributes.
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| 51 | *
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| 52 | * @returns
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| 53 | * @param fMode The mode mask containing dos-style attibutes only.
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| 54 | * @param pszName The filename which this applies to (exe check).
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| 55 | * @param cbName The length of that filename. (optional, set 0)
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| 56 | */
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| 57 | RTFMODE rtFsModeFromDos(RTFMODE fMode, const char *pszName, size_t cbName)
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| 58 | {
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| 59 | fMode &= ~((1 << RTFS_DOS_SHIFT) - 1);
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| 60 |
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| 61 | /* everything is readable. */
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| 62 | fMode |= RTFS_UNIX_IRUSR | RTFS_UNIX_IRGRP | RTFS_UNIX_IROTH;
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| 63 | if (fMode & RTFS_DOS_DIRECTORY)
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| 64 | /* directories are executable. */
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| 65 | fMode |= RTFS_TYPE_DIRECTORY | RTFS_UNIX_IXUSR | RTFS_UNIX_IXGRP | RTFS_UNIX_IXOTH;
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| 66 | else
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| 67 | {
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| 68 | fMode |= RTFS_TYPE_FILE;
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| 69 | if (!cbName && pszName)
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| 70 | cbName = strlen(pszName);
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| 71 | if (cbName >= 4 && pszName[cbName - 4] == '.')
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| 72 | {
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| 73 | /* check for executable extension. */
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| 74 | const char *pszExt = &pszName[cbName - 3];
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| 75 | char szExt[4];
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| 76 | szExt[0] = tolower(pszExt[0]);
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| 77 | szExt[1] = tolower(pszExt[1]);
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| 78 | szExt[2] = tolower(pszExt[2]);
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| 79 | szExt[3] = '\0';
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| 80 | if ( !memcmp(szExt, "exe", 4)
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| 81 | || !memcmp(szExt, "bat", 4)
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| 82 | || !memcmp(szExt, "com", 4)
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| 83 | || !memcmp(szExt, "cmd", 4)
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| 84 | || !memcmp(szExt, "btm", 4)
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| 85 | )
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| 86 | fMode |= RTFS_UNIX_IXUSR | RTFS_UNIX_IXGRP | RTFS_UNIX_IXOTH;
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| 87 | }
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| 88 | }
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| 89 | /* writable? */
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| 90 | if (!(fMode & RTFS_DOS_READONLY))
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| 91 | fMode |= RTFS_UNIX_IWUSR | RTFS_UNIX_IWGRP | RTFS_UNIX_IWOTH;
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| 92 | return fMode;
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| 93 | }
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| 94 |
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| 95 |
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| 96 | /**
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| 97 | * Converts Unix attributes to Dos-style attributes.
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| 98 | *
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| 99 | * @returns File mode mask.
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| 100 | * @param fMode The mode mask containing dos-style attibutes only.
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| 101 | * @param pszName The filename which this applies to (hidden check).
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| 102 | * @param cbName The length of that filename. (optional, set 0)
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| 103 | */
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| 104 | RTFMODE rtFsModeFromUnix(RTFMODE fMode, const char *pszName, size_t cbName)
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| 105 | {
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| 106 | fMode &= RTFS_UNIX_MASK;
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| 107 |
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| 108 | if (!(fMode & (RTFS_UNIX_IWUSR | RTFS_UNIX_IWGRP | RTFS_UNIX_IWOTH)))
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| 109 | fMode |= RTFS_DOS_READONLY;
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| 110 | if (RTFS_IS_DIRECTORY(fMode))
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| 111 | fMode |= RTFS_DOS_DIRECTORY;
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| 112 | if (!(fMode & RTFS_DOS_MASK))
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| 113 | fMode |= RTFS_DOS_NT_NORMAL;
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| 114 | if (!(fMode & RTFS_DOS_HIDDEN) && pszName)
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| 115 | {
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| 116 | pszName = RTPathFilename(pszName);
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| 117 | if (pszName && *pszName == '.')
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| 118 | fMode |= RTFS_DOS_HIDDEN;
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| 119 | }
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| 120 | return fMode;
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| 121 | }
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| 122 |
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| 123 |
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| 124 | /**
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| 125 | * Normalizes the give mode mask.
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| 126 | *
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| 127 | * It will create the missing unix or dos mask from the other (one
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| 128 | * of them is required by all APIs), and guess the file type if that's
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| 129 | * missing.
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| 130 | *
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| 131 | * @returns Normalized file mode.
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| 132 | * @param fMode The mode mask that may contain a partial/incomplete mask.
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| 133 | * @param pszName The filename which this applies to (exe check).
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| 134 | * @param cbName The length of that filename. (optional, set 0)
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| 135 | */
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| 136 | RTFMODE rtFsModeNormalize(RTFMODE fMode, const char *pszName, size_t cbName)
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| 137 | {
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| 138 | if (!(fMode & RTFS_UNIX_MASK))
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| 139 | fMode = rtFsModeFromDos(fMode, pszName, cbName);
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| 140 | else if (!(fMode & RTFS_DOS_MASK))
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| 141 | fMode = rtFsModeFromUnix(fMode, pszName, cbName);
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| 142 | else if (!(fMode & RTFS_TYPE_MASK))
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| 143 | fMode |= fMode & RTFS_DOS_DIRECTORY ? RTFS_TYPE_DIRECTORY : RTFS_TYPE_FILE;
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| 144 | else if (RTFS_IS_DIRECTORY(fMode))
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| 145 | fMode |= RTFS_DOS_DIRECTORY;
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| 146 | return fMode;
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| 147 | }
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| 148 |
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| 149 |
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| 150 | /**
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| 151 | * Checks if the file mode is valid or not.
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| 152 | *
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| 153 | * @return true if valid.
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| 154 | * @return false if invalid, done bitching.
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| 155 | * @param fMode The file mode.
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| 156 | */
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| 157 | bool rtFsModeIsValid(RTFMODE fMode)
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| 158 | {
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| 159 | AssertMsgReturn( (!RTFS_IS_DIRECTORY(fMode) && !(fMode & RTFS_DOS_DIRECTORY))
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| 160 | || (RTFS_IS_DIRECTORY(fMode) && (fMode & RTFS_DOS_DIRECTORY)),
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| 161 | ("%RTfmode\n", fMode), false);
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| 162 | AssertMsgReturn(RTFS_TYPE_MASK & fMode,
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| 163 | ("%RTfmode\n", fMode), false);
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| 164 | /** @todo more checks! */
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| 165 | return true;
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| 166 | }
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| 167 |
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| 168 |
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| 169 | /**
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| 170 | * Checks if the file mode is valid as a permission mask or not.
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| 171 | *
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| 172 | * @return true if valid.
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| 173 | * @return false if invalid, done bitching.
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| 174 | * @param fMode The file mode.
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| 175 | */
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| 176 | bool rtFsModeIsValidPermissions(RTFMODE fMode)
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| 177 | {
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| 178 | AssertMsgReturn( (!RTFS_IS_DIRECTORY(fMode) && !(fMode & RTFS_DOS_DIRECTORY))
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| 179 | || (RTFS_IS_DIRECTORY(fMode) && (fMode & RTFS_DOS_DIRECTORY)),
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| 180 | ("%RTfmode\n", fMode), false);
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| 181 | /** @todo more checks! */
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| 182 | return true;
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| 183 | }
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| 184 |
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| 185 |
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| 186 | #ifndef RT_OS_WINDOWS
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| 187 | /**
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| 188 | * Internal worker function which setups RTFSOBJINFO based on a UNIX stat struct.
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| 189 | *
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| 190 | * @param pObjInfo The file system object info structure to setup.
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| 191 | * @param pStat The stat structure to use.
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| 192 | * @param pszName The filename which this applies to (exe/hidden check).
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| 193 | * @param cbName The length of that filename. (optional, set 0)
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| 194 | */
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| 195 | void rtFsConvertStatToObjInfo(PRTFSOBJINFO pObjInfo, const struct stat *pStat, const char *pszName, unsigned cbName)
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| 196 | {
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| 197 | pObjInfo->cbObject = pStat->st_size;
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| 198 | pObjInfo->cbAllocated = pStat->st_size;
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| 199 |
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| 200 | #ifdef HAVE_STAT_NSEC
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| 201 | RTTimeSpecAddNano(RTTimeSpecSetSeconds(&pObjInfo->AccessTime, pStat->st_atime), pStat->st_atimensec);
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| 202 | RTTimeSpecAddNano(RTTimeSpecSetSeconds(&pObjInfo->ModificationTime, pStat->st_mtime), pStat->st_mtimensec);
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| 203 | RTTimeSpecAddNano(RTTimeSpecSetSeconds(&pObjInfo->ChangeTime, pStat->st_ctime), pStat->st_ctimensec);
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| 204 | #ifdef HAVE_STAT_BIRTHTIME
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| 205 | RTTimeSpecAddNano(RTTimeSpecSetSeconds(&pObjInfo->BirthTime, pStat->st_birthtime), pStat->st_birthtimensec);
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| 206 | #endif
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| 207 |
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| 208 | #elif defined(HAVE_STAT_TIMESPEC_BRIEF)
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| 209 | RTTimeSpecSetTimespec(&pObjInfo->AccessTime, &pStat->st_atim);
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| 210 | RTTimeSpecSetTimespec(&pObjInfo->ModificationTime, &pStat->st_mtim);
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| 211 | RTTimeSpecSetTimespec(&pObjInfo->ChangeTime, &pStat->st_ctim);
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| 212 | # ifdef HAVE_STAT_BIRTHTIME
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| 213 | RTTimeSpecSetTimespec(&pObjInfo->BirthTime, &pStat->st_birthtim);
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| 214 | # endif
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| 215 |
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| 216 | #elif defined(HAVE_STAT_TIMESPEC)
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| 217 | RTTimeSpecSetTimespec(&pObjInfo->AccessTime, pStat->st_atimespec);
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| 218 | RTTimeSpecSetTimespec(&pObjInfo->ModificationTime, pStat->st_mtimespec);
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| 219 | RTTimeSpecSetTimespec(&pObjInfo->ChangeTime, pStat->st_ctimespec);
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| 220 | # ifdef HAVE_STAT_BIRTHTIME
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| 221 | RTTimeSpecSetTimespec(&pObjInfo->BirthTime, pStat->st_birthtimespec);
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| 222 | # endif
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| 223 |
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| 224 | #else /* just the normal stuff */
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| 225 | RTTimeSpecSetSeconds(&pObjInfo->AccessTime, pStat->st_atime);
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| 226 | RTTimeSpecSetSeconds(&pObjInfo->ModificationTime, pStat->st_mtime);
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| 227 | RTTimeSpecSetSeconds(&pObjInfo->ChangeTime, pStat->st_ctime);
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| 228 | # ifdef HAVE_STAT_BIRTHTIME
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| 229 | RTTimeSpecSetSeconds(&pObjInfo->BirthTime, pStat->st_birthtime);
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| 230 | # endif
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| 231 | #endif
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| 232 | #ifndef HAVE_STAT_BIRTHTIME
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| 233 | pObjInfo->BirthTime = pObjInfo->ChangeTime;
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| 234 | #endif
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| 235 |
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| 236 |
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| 237 | /* the file mode */
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| 238 | RTFMODE fMode = pStat->st_mode & RTFS_UNIX_MASK;
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| 239 | Assert(RTFS_UNIX_ISUID == S_ISUID);
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| 240 | Assert(RTFS_UNIX_ISGID == S_ISGID);
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| 241 | #ifdef S_ISTXT
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| 242 | Assert(RTFS_UNIX_ISTXT == S_ISTXT);
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| 243 | #elif defined(S_ISVTX)
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| 244 | Assert(RTFS_UNIX_ISTXT == S_ISVTX);
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| 245 | #else
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| 246 | #error "S_ISVTX / S_ISTXT isn't defined"
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| 247 | #endif
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| 248 | Assert(RTFS_UNIX_IRWXU == S_IRWXU);
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| 249 | Assert(RTFS_UNIX_IRUSR == S_IRUSR);
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| 250 | Assert(RTFS_UNIX_IWUSR == S_IWUSR);
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| 251 | Assert(RTFS_UNIX_IXUSR == S_IXUSR);
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| 252 | Assert(RTFS_UNIX_IRWXG == S_IRWXG);
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| 253 | Assert(RTFS_UNIX_IRGRP == S_IRGRP);
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| 254 | Assert(RTFS_UNIX_IWGRP == S_IWGRP);
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| 255 | Assert(RTFS_UNIX_IXGRP == S_IXGRP);
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| 256 | Assert(RTFS_UNIX_IRWXO == S_IRWXO);
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| 257 | Assert(RTFS_UNIX_IROTH == S_IROTH);
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| 258 | Assert(RTFS_UNIX_IWOTH == S_IWOTH);
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| 259 | Assert(RTFS_UNIX_IXOTH == S_IXOTH);
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| 260 | Assert(RTFS_TYPE_FIFO == S_IFIFO);
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| 261 | Assert(RTFS_TYPE_DEV_CHAR == S_IFCHR);
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| 262 | Assert(RTFS_TYPE_DIRECTORY == S_IFDIR);
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| 263 | Assert(RTFS_TYPE_DEV_BLOCK == S_IFBLK);
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| 264 | Assert(RTFS_TYPE_FILE == S_IFREG);
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| 265 | Assert(RTFS_TYPE_SYMLINK == S_IFLNK);
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| 266 | Assert(RTFS_TYPE_SOCKET == S_IFSOCK);
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| 267 | #ifdef S_IFWHT
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| 268 | Assert(RTFS_TYPE_WHITEOUT == S_IFWHT);
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| 269 | #endif
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| 270 | Assert(RTFS_TYPE_MASK == S_IFMT);
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| 271 |
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| 272 | pObjInfo->Attr.fMode = rtFsModeFromUnix(fMode, pszName, cbName);
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| 273 |
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| 274 | /* additional unix attribs */
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| 275 | pObjInfo->Attr.enmAdditional = RTFSOBJATTRADD_UNIX;
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| 276 | pObjInfo->Attr.u.Unix.uid = pStat->st_uid;
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| 277 | pObjInfo->Attr.u.Unix.gid = pStat->st_gid;
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| 278 | pObjInfo->Attr.u.Unix.cHardlinks = pStat->st_nlink;
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| 279 | pObjInfo->Attr.u.Unix.INodeIdDevice = pStat->st_dev;
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| 280 | pObjInfo->Attr.u.Unix.INodeId = pStat->st_ino;
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| 281 | #ifdef HAVE_STAT_FLAGS
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| 282 | pObjInfo->Attr.u.Unix.fFlags = pStat->st_flags;
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| 283 | #else
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| 284 | pObjInfo->Attr.u.Unix.fFlags = 0;
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| 285 | #endif
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| 286 | #ifdef HAVE_STAT_GEN
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| 287 | pObjInfo->Attr.u.Unix.GenerationId = pStat->st_gen;
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| 288 | #else
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| 289 | pObjInfo->Attr.u.Unix.GenerationId = 0;
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| 290 | #endif
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| 291 | pObjInfo->Attr.u.Unix.Device = pStat->st_rdev;
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| 292 | }
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| 293 |
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| 294 | #endif /* !RT_OS_WINDOWS */
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