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/* $Id: fs.cpp $ */
/** @file
* IPRT - File System.
*/
/*
* Copyright (C) 2006-2007 Sun Microsystems, Inc.
*
* This file is part of VirtualBox Open Source Edition (OSE), as
* available from http://www.virtualbox.org. This file is free software;
* you can redistribute it and/or modify it under the terms of the GNU
* General Public License (GPL) as published by the Free Software
* Foundation, in version 2 as it comes in the "COPYING" file of the
* VirtualBox OSE distribution. VirtualBox OSE is distributed in the
* hope that it will be useful, but WITHOUT ANY WARRANTY of any kind.
*
* The contents of this file may alternatively be used under the terms
* of the Common Development and Distribution License Version 1.0
* (CDDL) only, as it comes in the "COPYING.CDDL" file of the
* VirtualBox OSE distribution, in which case the provisions of the
* CDDL are applicable instead of those of the GPL.
*
* You may elect to license modified versions of this file under the
* terms and conditions of either the GPL or the CDDL or both.
*
* Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa
* Clara, CA 95054 USA or visit http://www.sun.com if you need
* additional information or have any questions.
*/
/*******************************************************************************
* Header Files *
*******************************************************************************/
#ifndef RT_OS_WINDOWS
# define RTTIME_INCL_TIMESPEC
# include <sys/time.h>
# include <sys/param.h>
#endif
#include <iprt/fs.h>
#include <iprt/assert.h>
#include <iprt/time.h>
#include <iprt/string.h>
#include <iprt/path.h>
#include <iprt/ctype.h>
#include "internal/fs.h"
/**
* Converts dos-style attributes to Unix attributes.
*
* @returns
* @param fMode The mode mask containing dos-style attibutes only.
* @param pszName The filename which this applies to (exe check).
* @param cbName The length of that filename. (optional, set 0)
*/
RTFMODE rtFsModeFromDos(RTFMODE fMode, const char *pszName, size_t cbName)
{
fMode &= ~((1 << RTFS_DOS_SHIFT) - 1);
/* everything is readable. */
fMode |= RTFS_UNIX_IRUSR | RTFS_UNIX_IRGRP | RTFS_UNIX_IROTH;
if (fMode & RTFS_DOS_DIRECTORY)
/* directories are executable. */
fMode |= RTFS_TYPE_DIRECTORY | RTFS_UNIX_IXUSR | RTFS_UNIX_IXGRP | RTFS_UNIX_IXOTH;
else
{
fMode |= RTFS_TYPE_FILE;
if (!cbName && pszName)
cbName = strlen(pszName);
if (cbName >= 4 && pszName[cbName - 4] == '.')
{
/* check for executable extension. */
const char *pszExt = &pszName[cbName - 3];
char szExt[4];
szExt[0] = tolower(pszExt[0]);
szExt[1] = tolower(pszExt[1]);
szExt[2] = tolower(pszExt[2]);
szExt[3] = '\0';
if ( !memcmp(szExt, "exe", 4)
|| !memcmp(szExt, "bat", 4)
|| !memcmp(szExt, "com", 4)
|| !memcmp(szExt, "cmd", 4)
|| !memcmp(szExt, "btm", 4)
)
fMode |= RTFS_UNIX_IXUSR | RTFS_UNIX_IXGRP | RTFS_UNIX_IXOTH;
}
}
/* writable? */
if (!(fMode & RTFS_DOS_READONLY))
fMode |= RTFS_UNIX_IWUSR | RTFS_UNIX_IWGRP | RTFS_UNIX_IWOTH;
return fMode;
}
/**
* Converts Unix attributes to Dos-style attributes.
*
* @returns File mode mask.
* @param fMode The mode mask containing dos-style attibutes only.
* @param pszName The filename which this applies to (hidden check).
* @param cbName The length of that filename. (optional, set 0)
*/
RTFMODE rtFsModeFromUnix(RTFMODE fMode, const char *pszName, size_t cbName)
{
fMode &= RTFS_UNIX_MASK;
if (!(fMode & (RTFS_UNIX_IWUSR | RTFS_UNIX_IWGRP | RTFS_UNIX_IWOTH)))
fMode |= RTFS_DOS_READONLY;
if (RTFS_IS_DIRECTORY(fMode))
fMode |= RTFS_DOS_DIRECTORY;
if (!(fMode & RTFS_DOS_MASK))
fMode |= RTFS_DOS_NT_NORMAL;
if (!(fMode & RTFS_DOS_HIDDEN) && pszName)
{
pszName = RTPathFilename(pszName);
if (pszName && *pszName == '.')
fMode |= RTFS_DOS_HIDDEN;
}
return fMode;
}
/**
* Normalizes the give mode mask.
*
* It will create the missing unix or dos mask from the other (one
* of them is required by all APIs), and guess the file type if that's
* missing.
*
* @returns Normalized file mode.
* @param fMode The mode mask that may contain a partial/incomplete mask.
* @param pszName The filename which this applies to (exe check).
* @param cbName The length of that filename. (optional, set 0)
*/
RTFMODE rtFsModeNormalize(RTFMODE fMode, const char *pszName, size_t cbName)
{
if (!(fMode & RTFS_UNIX_MASK))
fMode = rtFsModeFromDos(fMode, pszName, cbName);
else if (!(fMode & RTFS_DOS_MASK))
fMode = rtFsModeFromUnix(fMode, pszName, cbName);
else if (!(fMode & RTFS_TYPE_MASK))
fMode |= fMode & RTFS_DOS_DIRECTORY ? RTFS_TYPE_DIRECTORY : RTFS_TYPE_FILE;
else if (RTFS_IS_DIRECTORY(fMode))
fMode |= RTFS_DOS_DIRECTORY;
return fMode;
}
/**
* Checks if the file mode is valid or not.
*
* @return true if valid.
* @return false if invalid, done bitching.
* @param fMode The file mode.
*/
bool rtFsModeIsValid(RTFMODE fMode)
{
AssertMsgReturn( (!RTFS_IS_DIRECTORY(fMode) && !(fMode & RTFS_DOS_DIRECTORY))
|| (RTFS_IS_DIRECTORY(fMode) && (fMode & RTFS_DOS_DIRECTORY)),
("%RTfmode\n", fMode), false);
AssertMsgReturn(RTFS_TYPE_MASK & fMode,
("%RTfmode\n", fMode), false);
/** @todo more checks! */
return true;
}
/**
* Checks if the file mode is valid as a permission mask or not.
*
* @return true if valid.
* @return false if invalid, done bitching.
* @param fMode The file mode.
*/
bool rtFsModeIsValidPermissions(RTFMODE fMode)
{
AssertMsgReturn( (!RTFS_IS_DIRECTORY(fMode) && !(fMode & RTFS_DOS_DIRECTORY))
|| (RTFS_IS_DIRECTORY(fMode) && (fMode & RTFS_DOS_DIRECTORY)),
("%RTfmode\n", fMode), false);
/** @todo more checks! */
return true;
}
#ifndef RT_OS_WINDOWS
/**
* Internal worker function which setups RTFSOBJINFO based on a UNIX stat struct.
*
* @param pObjInfo The file system object info structure to setup.
* @param pStat The stat structure to use.
* @param pszName The filename which this applies to (exe/hidden check).
* @param cbName The length of that filename. (optional, set 0)
*/
void rtFsConvertStatToObjInfo(PRTFSOBJINFO pObjInfo, const struct stat *pStat, const char *pszName, unsigned cbName)
{
pObjInfo->cbObject = pStat->st_size;
pObjInfo->cbAllocated = pStat->st_blocks * DEV_BSIZE;
#ifdef HAVE_STAT_NSEC
RTTimeSpecAddNano(RTTimeSpecSetSeconds(&pObjInfo->AccessTime, pStat->st_atime), pStat->st_atimensec);
RTTimeSpecAddNano(RTTimeSpecSetSeconds(&pObjInfo->ModificationTime, pStat->st_mtime), pStat->st_mtimensec);
RTTimeSpecAddNano(RTTimeSpecSetSeconds(&pObjInfo->ChangeTime, pStat->st_ctime), pStat->st_ctimensec);
#ifdef HAVE_STAT_BIRTHTIME
RTTimeSpecAddNano(RTTimeSpecSetSeconds(&pObjInfo->BirthTime, pStat->st_birthtime), pStat->st_birthtimensec);
#endif
#elif defined(HAVE_STAT_TIMESPEC_BRIEF)
RTTimeSpecSetTimespec(&pObjInfo->AccessTime, &pStat->st_atim);
RTTimeSpecSetTimespec(&pObjInfo->ModificationTime, &pStat->st_mtim);
RTTimeSpecSetTimespec(&pObjInfo->ChangeTime, &pStat->st_ctim);
# ifdef HAVE_STAT_BIRTHTIME
RTTimeSpecSetTimespec(&pObjInfo->BirthTime, &pStat->st_birthtim);
# endif
#elif defined(HAVE_STAT_TIMESPEC)
RTTimeSpecSetTimespec(&pObjInfo->AccessTime, pStat->st_atimespec);
RTTimeSpecSetTimespec(&pObjInfo->ModificationTime, pStat->st_mtimespec);
RTTimeSpecSetTimespec(&pObjInfo->ChangeTime, pStat->st_ctimespec);
# ifdef HAVE_STAT_BIRTHTIME
RTTimeSpecSetTimespec(&pObjInfo->BirthTime, pStat->st_birthtimespec);
# endif
#else /* just the normal stuff */
RTTimeSpecSetSeconds(&pObjInfo->AccessTime, pStat->st_atime);
RTTimeSpecSetSeconds(&pObjInfo->ModificationTime, pStat->st_mtime);
RTTimeSpecSetSeconds(&pObjInfo->ChangeTime, pStat->st_ctime);
# ifdef HAVE_STAT_BIRTHTIME
RTTimeSpecSetSeconds(&pObjInfo->BirthTime, pStat->st_birthtime);
# endif
#endif
#ifndef HAVE_STAT_BIRTHTIME
pObjInfo->BirthTime = pObjInfo->ChangeTime;
#endif
/* the file mode */
RTFMODE fMode = pStat->st_mode & RTFS_UNIX_MASK;
Assert(RTFS_UNIX_ISUID == S_ISUID);
Assert(RTFS_UNIX_ISGID == S_ISGID);
#ifdef S_ISTXT
Assert(RTFS_UNIX_ISTXT == S_ISTXT);
#elif defined(S_ISVTX)
Assert(RTFS_UNIX_ISTXT == S_ISVTX);
#else
#error "S_ISVTX / S_ISTXT isn't defined"
#endif
Assert(RTFS_UNIX_IRWXU == S_IRWXU);
Assert(RTFS_UNIX_IRUSR == S_IRUSR);
Assert(RTFS_UNIX_IWUSR == S_IWUSR);
Assert(RTFS_UNIX_IXUSR == S_IXUSR);
Assert(RTFS_UNIX_IRWXG == S_IRWXG);
Assert(RTFS_UNIX_IRGRP == S_IRGRP);
Assert(RTFS_UNIX_IWGRP == S_IWGRP);
Assert(RTFS_UNIX_IXGRP == S_IXGRP);
Assert(RTFS_UNIX_IRWXO == S_IRWXO);
Assert(RTFS_UNIX_IROTH == S_IROTH);
Assert(RTFS_UNIX_IWOTH == S_IWOTH);
Assert(RTFS_UNIX_IXOTH == S_IXOTH);
Assert(RTFS_TYPE_FIFO == S_IFIFO);
Assert(RTFS_TYPE_DEV_CHAR == S_IFCHR);
Assert(RTFS_TYPE_DIRECTORY == S_IFDIR);
Assert(RTFS_TYPE_DEV_BLOCK == S_IFBLK);
Assert(RTFS_TYPE_FILE == S_IFREG);
Assert(RTFS_TYPE_SYMLINK == S_IFLNK);
Assert(RTFS_TYPE_SOCKET == S_IFSOCK);
#ifdef S_IFWHT
Assert(RTFS_TYPE_WHITEOUT == S_IFWHT);
#endif
Assert(RTFS_TYPE_MASK == S_IFMT);
pObjInfo->Attr.fMode = rtFsModeFromUnix(fMode, pszName, cbName);
/* additional unix attribs */
pObjInfo->Attr.enmAdditional = RTFSOBJATTRADD_UNIX;
pObjInfo->Attr.u.Unix.uid = pStat->st_uid;
pObjInfo->Attr.u.Unix.gid = pStat->st_gid;
pObjInfo->Attr.u.Unix.cHardlinks = pStat->st_nlink;
pObjInfo->Attr.u.Unix.INodeIdDevice = pStat->st_dev;
pObjInfo->Attr.u.Unix.INodeId = pStat->st_ino;
#ifdef HAVE_STAT_FLAGS
pObjInfo->Attr.u.Unix.fFlags = pStat->st_flags;
#else
pObjInfo->Attr.u.Unix.fFlags = 0;
#endif
#ifdef HAVE_STAT_GEN
pObjInfo->Attr.u.Unix.GenerationId = pStat->st_gen;
#else
pObjInfo->Attr.u.Unix.GenerationId = 0;
#endif
pObjInfo->Attr.u.Unix.Device = pStat->st_rdev;
}
#endif /* !RT_OS_WINDOWS */
|
