| 1 | /* $Id: fs.cpp 1 1970-01-01 00:00:00Z vboxsync $ */
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| 2 | /** @file
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| 3 | * InnoTek Portable Runtime - 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 InnoTek Systemberatung GmbH
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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 as published by the Free Software Foundation,
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| 13 | * in version 2 as it comes in the "COPYING" file of the VirtualBox OSE
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| 14 | * distribution. VirtualBox OSE is distributed in the hope that it will
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| 15 | * be useful, but WITHOUT ANY WARRANTY of any kind.
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| 16 | *
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| 17 | * If you received this file as part of a commercial VirtualBox
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| 18 | * distribution, then only the terms of your commercial VirtualBox
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| 19 | * license agreement apply instead of the previous paragraph.
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| 20 | */
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| 21 |
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| 22 |
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| 23 | /*******************************************************************************
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| 24 | * Header Files *
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| 25 | *******************************************************************************/
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| 26 | #ifndef __WIN__
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| 27 | # define RTTIME_INCL_TIMESPEC
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| 28 | # include <sys/time.h>
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| 29 | #endif
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| 30 |
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| 31 | #include <iprt/fs.h>
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| 32 | #include <iprt/assert.h>
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| 33 | #include <iprt/time.h>
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| 34 | #include <iprt/string.h>
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| 35 | #include <iprt/ctype.h>
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| 36 | #include "internal/fs.h"
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| 37 |
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| 38 |
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| 39 | /**
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| 40 | * Converts dos-style attributes to Unix attributes.
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| 41 | *
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| 42 | * @returns
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| 43 | * @param fMode The mode mask containing dos-style attibutes only.
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| 44 | * @param pszName The filename which this applies to (exe check).
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| 45 | * @param cbName The length of that filename. (optional, set 0)
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| 46 | */
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| 47 | RTFMODE rtFsModeFromDos(RTFMODE fMode, const char *pszName, unsigned cbName)
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| 48 | {
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| 49 | fMode &= ~((1 << RTFS_DOS_SHIFT) - 1);
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| 50 |
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| 51 | /* everything is readable. */
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| 52 | fMode |= RTFS_UNIX_IRUSR | RTFS_UNIX_IRGRP | RTFS_UNIX_IROTH;
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| 53 | if (fMode & RTFS_DOS_DIRECTORY)
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| 54 | /* directories are executable. */
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| 55 | fMode |= RTFS_TYPE_DIRECTORY | RTFS_UNIX_IXUSR | RTFS_UNIX_IXGRP | RTFS_UNIX_IXOTH;
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| 56 | else
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| 57 | {
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| 58 | fMode |= RTFS_TYPE_FILE;
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| 59 | if (!cbName && pszName)
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| 60 | cbName = strlen(pszName);
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| 61 | if (cbName >= 4 && pszName[cbName - 4] == '.')
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| 62 | {
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| 63 | /* check for executable extension. */
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| 64 | const char *pszExt = &pszName[cbName - 3];
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| 65 | char szExt[4];
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| 66 | szExt[0] = tolower(pszExt[0]);
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| 67 | szExt[1] = tolower(pszExt[1]);
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| 68 | szExt[2] = tolower(pszExt[2]);
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| 69 | szExt[3] = '\0';
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| 70 | if ( !memcmp(szExt, "exe", 4)
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| 71 | || !memcmp(szExt, "bat", 4)
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| 72 | || !memcmp(szExt, "com", 4)
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| 73 | || !memcmp(szExt, "cmd", 4)
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| 74 | || !memcmp(szExt, "btm", 4)
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| 75 | )
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| 76 | fMode |= RTFS_UNIX_IXUSR | RTFS_UNIX_IXGRP | RTFS_UNIX_IXOTH;
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| 77 | }
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| 78 | }
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| 79 | /* writable? */
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| 80 | if (!(fMode & RTFS_DOS_READONLY))
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| 81 | fMode |= RTFS_UNIX_IWUSR | RTFS_UNIX_IWGRP | RTFS_UNIX_IWOTH;
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| 82 | return fMode;
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| 83 | }
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| 84 |
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| 85 |
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| 86 | /**
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| 87 | * Converts Unix attributes to Dos-style attributes.
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| 88 | *
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| 89 | * @returns
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| 90 | * @param fMode The mode mask containing dos-style attibutes only.
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| 91 | */
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| 92 | RTFMODE rtFsModeFromUnix(RTFMODE fMode)
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| 93 | {
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| 94 | fMode &= RTFS_UNIX_MASK;
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| 95 |
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| 96 | if (!(fMode & (RTFS_UNIX_IWUSR | RTFS_UNIX_IWGRP | RTFS_UNIX_IWOTH)))
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| 97 | fMode |= RTFS_DOS_READONLY;
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| 98 | if (RTFS_IS_DIRECTORY(fMode))
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| 99 | fMode |= RTFS_DOS_DIRECTORY;
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| 100 | if (!(fMode & RTFS_DOS_MASK))
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| 101 | fMode |= RTFS_DOS_NT_NORMAL;
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| 102 | return fMode;
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| 103 | }
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| 104 |
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| 105 |
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| 106 | /**
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| 107 | * Converts dos-style attributes to Unix attributes.
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| 108 | *
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| 109 | * @returns Normalized file mode.
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| 110 | * @param fMode The mode mask containing dos-style attibutes only.
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| 111 | * @param pszName The filename which this applies to (exe check).
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| 112 | * @param cbName The length of that filename. (optional, set 0)
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| 113 | */
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| 114 | RTFMODE rtFsModeNormalize(RTFMODE fMode, const char *pszName, unsigned cbName)
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| 115 | {
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| 116 | if (!(fMode & RTFS_UNIX_MASK))
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| 117 | rtFsModeFromDos(fMode, pszName, cbName);
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| 118 | else if (!(fMode & RTFS_DOS_MASK))
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| 119 | rtFsModeFromUnix(fMode);
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| 120 | else if (!(fMode & RTFS_TYPE_MASK))
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| 121 | fMode |= fMode & RTFS_DOS_DIRECTORY ? RTFS_TYPE_DIRECTORY : RTFS_TYPE_FILE;
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| 122 | else if (RTFS_IS_DIRECTORY(fMode))
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| 123 | fMode |= RTFS_DOS_DIRECTORY;
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| 124 | return fMode;
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| 125 | }
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| 126 |
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| 127 |
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| 128 | /**
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| 129 | * Checks if the file mode is valid or not.
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| 130 | *
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| 131 | * @return true if valid.
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| 132 | * @return false if invalid, done bitching.
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| 133 | * @param fMode The file mode.
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| 134 | */
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| 135 | bool rtFsModeIsValid(RTFMODE fMode)
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| 136 | {
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| 137 | AssertMsgReturn( (!RTFS_IS_DIRECTORY(fMode) && !(fMode & RTFS_DOS_DIRECTORY))
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| 138 | || (RTFS_IS_DIRECTORY(fMode) && (fMode & RTFS_DOS_DIRECTORY)),
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| 139 | ("%RTfmode\n", fMode), false);
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| 140 | AssertMsgReturn(RTFS_TYPE_MASK & fMode,
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| 141 | ("%RTfmode\n", fMode), false);
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| 142 | /** @todo more checks! */
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| 143 | return true;
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| 144 | }
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| 145 |
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| 146 |
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| 147 | /**
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| 148 | * Checks if the file mode is valid as a permission mask or not.
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| 149 | *
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| 150 | * @return true if valid.
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| 151 | * @return false if invalid, done bitching.
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| 152 | * @param fMode The file mode.
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| 153 | */
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| 154 | bool rtFsModeIsValidPermissions(RTFMODE fMode)
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| 155 | {
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| 156 | AssertMsgReturn( (!RTFS_IS_DIRECTORY(fMode) && !(fMode & RTFS_DOS_DIRECTORY))
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| 157 | || (RTFS_IS_DIRECTORY(fMode) && (fMode & RTFS_DOS_DIRECTORY)),
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| 158 | ("%RTfmode\n", fMode), false);
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| 159 | /** @todo more checks! */
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| 160 | return true;
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| 161 | }
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| 162 |
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| 163 |
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| 164 | #ifndef __WIN__
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| 165 | /**
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| 166 | * Internal worker function which setups RTFSOBJINFO based on a UNIX stat struct.
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| 167 | *
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| 168 | * @param pObjInfo The file system object info structure to setup.
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| 169 | * @param pStat The stat structure to use.
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| 170 | */
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| 171 | void rtFsConvertStatToObjInfo(PRTFSOBJINFO pObjInfo, const struct stat *pStat)
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| 172 | {
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| 173 | pObjInfo->cbObject = pStat->st_size;
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| 174 | pObjInfo->cbAllocated = pStat->st_size;
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| 175 |
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| 176 | #ifdef HAVE_STAT_NSEC
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| 177 | RTTimeSpecAddNano(RTTimeSpecSetSeconds(&pObjInfo->AccessTime, pStat->st_atime), pStat->st_atimensec);
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| 178 | RTTimeSpecAddNano(RTTimeSpecSetSeconds(&pObjInfo->ModificationTime, pStat->st_mtime), pStat->st_mtimensec);
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| 179 | RTTimeSpecAddNano(RTTimeSpecSetSeconds(&pObjInfo->ChangeTime, pStat->st_ctime), pStat->st_ctimensec);
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| 180 | #ifdef HAVE_STAT_BIRTHTIME
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| 181 | RTTimeSpecAddNano(RTTimeSpecSetSeconds(&pObjInfo->BirthTime, pStat->st_birthtime), pStat->st_birthtimensec);
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| 182 | #endif
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| 183 |
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| 184 | #elif defined(HAVE_STAT_TIMESPEC_BRIEF)
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| 185 | RTTimeSpecSetTimespec(&pObjInfo->AccessTime, &pStat->st_atim);
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| 186 | RTTimeSpecSetTimespec(&pObjInfo->ModificationTime, &pStat->st_mtim);
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| 187 | RTTimeSpecSetTimespec(&pObjInfo->ChangeTime, &pStat->st_ctim);
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| 188 | # ifdef HAVE_STAT_BIRTHTIME
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| 189 | RTTimeSpecSetTimespec(&pObjInfo->BirthTime, &pStat->st_birthtim);
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| 190 | # endif
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| 191 |
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| 192 | #elif defined(HAVE_STAT_TIMESPEC)
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| 193 | RTTimeSpecSetTimespec(&pObjInfo->AccessTime, pStat->st_atimespec);
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| 194 | RTTimeSpecSetTimespec(&pObjInfo->ModificationTime, pStat->st_mtimespec);
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| 195 | RTTimeSpecSetTimespec(&pObjInfo->ChangeTime, pStat->st_ctimespec);
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| 196 | # ifdef HAVE_STAT_BIRTHTIME
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| 197 | RTTimeSpecSetTimespec(&pObjInfo->BirthTime, pStat->st_birthtimespec);
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| 198 | # endif
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| 199 |
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| 200 | #else /* just the normal stuff */
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| 201 | RTTimeSpecSetSeconds(&pObjInfo->AccessTime, pStat->st_atime);
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| 202 | RTTimeSpecSetSeconds(&pObjInfo->ModificationTime, pStat->st_mtime);
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| 203 | RTTimeSpecSetSeconds(&pObjInfo->ChangeTime, pStat->st_ctime);
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| 204 | # ifdef HAVE_STAT_BIRTHTIME
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| 205 | RTTimeSpecSetSeconds(&pObjInfo->BirthTime, pStat->st_birthtime);
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| 206 | # endif
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| 207 | #endif
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| 208 | #ifndef HAVE_STAT_BIRTHTIME
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| 209 | pObjInfo->BirthTime = pObjInfo->ChangeTime;
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| 210 | #endif
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| 211 |
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| 212 |
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| 213 | /* the file mode */
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| 214 | RTFMODE fMode = pStat->st_mode & RTFS_UNIX_MASK;
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| 215 | Assert(RTFS_UNIX_ISUID == S_ISUID);
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| 216 | Assert(RTFS_UNIX_ISGID == S_ISGID);
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| 217 | #ifdef S_ISTXT
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| 218 | Assert(RTFS_UNIX_ISTXT == S_ISTXT);
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| 219 | #elif defined(S_ISVTX)
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| 220 | Assert(RTFS_UNIX_ISTXT == S_ISVTX);
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| 221 | #else
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| 222 | #error "S_ISVTX / S_ISTXT isn't defined"
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| 223 | #endif
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| 224 | Assert(RTFS_UNIX_IRWXU == S_IRWXU);
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| 225 | Assert(RTFS_UNIX_IRUSR == S_IRUSR);
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| 226 | Assert(RTFS_UNIX_IWUSR == S_IWUSR);
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| 227 | Assert(RTFS_UNIX_IXUSR == S_IXUSR);
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| 228 | Assert(RTFS_UNIX_IRWXG == S_IRWXG);
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| 229 | Assert(RTFS_UNIX_IRGRP == S_IRGRP);
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| 230 | Assert(RTFS_UNIX_IWGRP == S_IWGRP);
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| 231 | Assert(RTFS_UNIX_IXGRP == S_IXGRP);
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| 232 | Assert(RTFS_UNIX_IRWXO == S_IRWXO);
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| 233 | Assert(RTFS_UNIX_IROTH == S_IROTH);
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| 234 | Assert(RTFS_UNIX_IWOTH == S_IWOTH);
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| 235 | Assert(RTFS_UNIX_IXOTH == S_IXOTH);
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| 236 | Assert(RTFS_TYPE_FIFO == S_IFIFO);
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| 237 | Assert(RTFS_TYPE_DEV_CHAR == S_IFCHR);
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| 238 | Assert(RTFS_TYPE_DIRECTORY == S_IFDIR);
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| 239 | Assert(RTFS_TYPE_DEV_BLOCK == S_IFBLK);
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| 240 | Assert(RTFS_TYPE_FILE == S_IFREG);
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| 241 | Assert(RTFS_TYPE_SYMLINK == S_IFLNK);
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| 242 | Assert(RTFS_TYPE_SOCKET == S_IFSOCK);
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| 243 | #ifdef S_IFWHT
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| 244 | Assert(RTFS_TYPE_WHITEOUT == S_IFWHT);
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| 245 | #endif
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| 246 | Assert(RTFS_TYPE_MASK == S_IFMT);
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| 247 |
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| 248 | pObjInfo->Attr.fMode = rtFsModeFromUnix(fMode);
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| 249 |
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| 250 | /* additional unix attribs */
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| 251 | pObjInfo->Attr.enmAdditional = RTFSOBJATTRADD_UNIX;
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| 252 | pObjInfo->Attr.u.Unix.uid = pStat->st_uid;
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| 253 | pObjInfo->Attr.u.Unix.gid = pStat->st_gid;
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| 254 | pObjInfo->Attr.u.Unix.cHardlinks = pStat->st_nlink;
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| 255 | pObjInfo->Attr.u.Unix.INodeIdDevice = pStat->st_dev;
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| 256 | pObjInfo->Attr.u.Unix.INodeId = pStat->st_ino;
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| 257 | #ifdef HAVE_STAT_FLAGS
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| 258 | pObjInfo->Attr.u.Unix.fFlags = pStat->st_flags;
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| 259 | #else
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| 260 | pObjInfo->Attr.u.Unix.fFlags = 0;
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| 261 | #endif
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| 262 | #ifdef HAVE_STAT_GEN
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| 263 | pObjInfo->Attr.u.Unix.GenerationId = pStat->st_gen;
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| 264 | #else
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| 265 | pObjInfo->Attr.u.Unix.GenerationId = 0;
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| 266 | #endif
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| 267 | pObjInfo->Attr.u.Unix.Device = pStat->st_rdev;
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| 268 | }
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| 269 |
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| 270 | #endif /* !__WIN__ */
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