r3/posix/fileio2-posix.cpp

	fileio2-posix.cpp revision 9fc464631dc4a68fbb5eb6419d61fbe91b6b16bd
1c2c968fd241148110002d75b2c0fdeddc211e14vboxsync/* $Id$ */
1c2c968fd241148110002d75b2c0fdeddc211e14vboxsync/** @file
1c2c968fd241148110002d75b2c0fdeddc211e14vboxsync * IPRT - File I/O, POSIX, Part 2.
1c2c968fd241148110002d75b2c0fdeddc211e14vboxsync */
1c2c968fd241148110002d75b2c0fdeddc211e14vboxsync
1c2c968fd241148110002d75b2c0fdeddc211e14vboxsync/*
c7814cf6e1240a519cbec0441e033d0e2470ed00vboxsync * Copyright (C) 2006-2012 Oracle Corporation
1c2c968fd241148110002d75b2c0fdeddc211e14vboxsync *
1c2c968fd241148110002d75b2c0fdeddc211e14vboxsync * This file is part of VirtualBox Open Source Edition (OSE), as
1c2c968fd241148110002d75b2c0fdeddc211e14vboxsync * available from http://www.virtualbox.org. This file is free software;
1c2c968fd241148110002d75b2c0fdeddc211e14vboxsync * you can redistribute it and/or modify it under the terms of the GNU
1c2c968fd241148110002d75b2c0fdeddc211e14vboxsync * General Public License (GPL) as published by the Free Software
1c2c968fd241148110002d75b2c0fdeddc211e14vboxsync * Foundation, in version 2 as it comes in the "COPYING" file of the
1c2c968fd241148110002d75b2c0fdeddc211e14vboxsync * VirtualBox OSE distribution. VirtualBox OSE is distributed in the
1c2c968fd241148110002d75b2c0fdeddc211e14vboxsync * hope that it will be useful, but WITHOUT ANY WARRANTY of any kind.
1c2c968fd241148110002d75b2c0fdeddc211e14vboxsync *
1c2c968fd241148110002d75b2c0fdeddc211e14vboxsync * The contents of this file may alternatively be used under the terms
1c2c968fd241148110002d75b2c0fdeddc211e14vboxsync * of the Common Development and Distribution License Version 1.0
1c2c968fd241148110002d75b2c0fdeddc211e14vboxsync * (CDDL) only, as it comes in the "COPYING.CDDL" file of the
1c2c968fd241148110002d75b2c0fdeddc211e14vboxsync * VirtualBox OSE distribution, in which case the provisions of the
1c2c968fd241148110002d75b2c0fdeddc211e14vboxsync * CDDL are applicable instead of those of the GPL.
1c2c968fd241148110002d75b2c0fdeddc211e14vboxsync *
1c2c968fd241148110002d75b2c0fdeddc211e14vboxsync * You may elect to license modified versions of this file under the
1c2c968fd241148110002d75b2c0fdeddc211e14vboxsync * terms and conditions of either the GPL or the CDDL or both.
1c2c968fd241148110002d75b2c0fdeddc211e14vboxsync */
1c2c968fd241148110002d75b2c0fdeddc211e14vboxsync
1c2c968fd241148110002d75b2c0fdeddc211e14vboxsync
1c2c968fd241148110002d75b2c0fdeddc211e14vboxsync/*******************************************************************************
1c2c968fd241148110002d75b2c0fdeddc211e14vboxsync*   Header Files                                                               *
1c2c968fd241148110002d75b2c0fdeddc211e14vboxsync*******************************************************************************/
1c2c968fd241148110002d75b2c0fdeddc211e14vboxsync#define LOG_GROUP RTLOGGROUP_FILE
1c2c968fd241148110002d75b2c0fdeddc211e14vboxsync
1c2c968fd241148110002d75b2c0fdeddc211e14vboxsync#include <errno.h>
1c2c968fd241148110002d75b2c0fdeddc211e14vboxsync#include <sys/stat.h>
1c2c968fd241148110002d75b2c0fdeddc211e14vboxsync#include <sys/types.h>
1c2c968fd241148110002d75b2c0fdeddc211e14vboxsync#ifdef _MSC_VER
1c2c968fd241148110002d75b2c0fdeddc211e14vboxsync# include <io.h>
1c2c968fd241148110002d75b2c0fdeddc211e14vboxsync# include <stdio.h>
1c2c968fd241148110002d75b2c0fdeddc211e14vboxsync#else
1c2c968fd241148110002d75b2c0fdeddc211e14vboxsync# include <unistd.h>
1c2c968fd241148110002d75b2c0fdeddc211e14vboxsync# include <sys/time.h>
1c2c968fd241148110002d75b2c0fdeddc211e14vboxsync#endif
1c2c968fd241148110002d75b2c0fdeddc211e14vboxsync#ifdef RT_OS_LINUX
1c2c968fd241148110002d75b2c0fdeddc211e14vboxsync# include <sys/file.h>
1c2c968fd241148110002d75b2c0fdeddc211e14vboxsync#endif
1c2c968fd241148110002d75b2c0fdeddc211e14vboxsync#if defined(RT_OS_OS2) && (!defined(__INNOTEK_LIBC__) || __INNOTEK_LIBC__ < 0x006)
1c2c968fd241148110002d75b2c0fdeddc211e14vboxsync# include <io.h>
1c2c968fd241148110002d75b2c0fdeddc211e14vboxsync#endif
1c2c968fd241148110002d75b2c0fdeddc211e14vboxsync#ifdef RT_OS_L4
1c2c968fd241148110002d75b2c0fdeddc211e14vboxsync/* This is currently ifdef'ed out in the relevant L4 header file */
1c2c968fd241148110002d75b2c0fdeddc211e14vboxsync/* Same as `utimes', but takes an open file descriptor instead of a name.  */
1c2c968fd241148110002d75b2c0fdeddc211e14vboxsyncextern int futimes(int __fd, __const struct timeval __tvp[2]) __THROW;
1c2c968fd241148110002d75b2c0fdeddc211e14vboxsync#endif
1c2c968fd241148110002d75b2c0fdeddc211e14vboxsync
1c2c968fd241148110002d75b2c0fdeddc211e14vboxsync#ifdef RT_OS_SOLARIS
1c2c968fd241148110002d75b2c0fdeddc211e14vboxsync# define futimes(filedes, timeval)   futimesat(filedes, NULL, timeval)
1c2c968fd241148110002d75b2c0fdeddc211e14vboxsync#endif
1c2c968fd241148110002d75b2c0fdeddc211e14vboxsync
1c2c968fd241148110002d75b2c0fdeddc211e14vboxsync#ifdef RT_OS_HAIKU
1c2c968fd241148110002d75b2c0fdeddc211e14vboxsync# define USE_FUTIMENS
1c2c968fd241148110002d75b2c0fdeddc211e14vboxsync#endif
1c2c968fd241148110002d75b2c0fdeddc211e14vboxsync
1c2c968fd241148110002d75b2c0fdeddc211e14vboxsync#include <iprt/file.h>
1c2c968fd241148110002d75b2c0fdeddc211e14vboxsync#include <iprt/path.h>
1c2c968fd241148110002d75b2c0fdeddc211e14vboxsync#include <iprt/assert.h>
1c2c968fd241148110002d75b2c0fdeddc211e14vboxsync#include <iprt/string.h>
1c2c968fd241148110002d75b2c0fdeddc211e14vboxsync#include <iprt/err.h>
1c2c968fd241148110002d75b2c0fdeddc211e14vboxsync#include <iprt/log.h>
#include "internal/file.h"
#include "internal/fs.h"
#include "internal/path.h"


RTR3DECL(int) RTFileQueryInfo(RTFILE hFile, PRTFSOBJINFO pObjInfo, RTFSOBJATTRADD enmAdditionalAttribs)
{
    /*
     * Validate input.
     */
    AssertReturn(hFile != NIL_RTFILE, VERR_INVALID_PARAMETER);
    AssertPtrReturn(pObjInfo, VERR_INVALID_PARAMETER);
    if (    enmAdditionalAttribs < RTFSOBJATTRADD_NOTHING
        ||  enmAdditionalAttribs > RTFSOBJATTRADD_LAST)
    {
        AssertMsgFailed(("Invalid enmAdditionalAttribs=%p\n", enmAdditionalAttribs));
        return VERR_INVALID_PARAMETER;
    }

    /*
     * Query file info.
     */
    struct stat Stat;
    if (fstat(RTFileToNative(hFile), &Stat))
    {
        int rc = RTErrConvertFromErrno(errno);
        Log(("RTFileQueryInfo(%RTfile,,%d): returns %Rrc\n", hFile, enmAdditionalAttribs, rc));
        return rc;
    }

    /*
     * Setup the returned data.
     */
    rtFsConvertStatToObjInfo(pObjInfo, &Stat, NULL, 0);

    /*
     * Requested attributes (we cannot provide anything actually).
     */
    switch (enmAdditionalAttribs)
    {
        case RTFSOBJATTRADD_NOTHING:
        case RTFSOBJATTRADD_UNIX:
            /* done */
            break;

        case RTFSOBJATTRADD_UNIX_OWNER:
            rtFsObjInfoAttrSetUnixOwner(pObjInfo, Stat.st_uid);
            break;

        case RTFSOBJATTRADD_UNIX_GROUP:
            rtFsObjInfoAttrSetUnixGroup(pObjInfo, Stat.st_gid);
            break;

        case RTFSOBJATTRADD_EASIZE:
            pObjInfo->Attr.enmAdditional          = RTFSOBJATTRADD_EASIZE;
            pObjInfo->Attr.u.EASize.cb            = 0;
            break;

        default:
            AssertMsgFailed(("Impossible!\n"));
            return VERR_INTERNAL_ERROR;
    }

    LogFlow(("RTFileQueryInfo(%RTfile,,%d): returns VINF_SUCCESS\n", hFile, enmAdditionalAttribs));
    return VINF_SUCCESS;
}


RTR3DECL(int) RTFileSetTimes(RTFILE hFile, PCRTTIMESPEC pAccessTime, PCRTTIMESPEC pModificationTime,
                             PCRTTIMESPEC pChangeTime, PCRTTIMESPEC pBirthTime)
{
    NOREF(pChangeTime); NOREF(pBirthTime);

    /*
     * We can only set AccessTime and ModificationTime, so if neither
     * are specified we can return immediately.
     */
    if (!pAccessTime && !pModificationTime)
        return VINF_SUCCESS;

#ifdef USE_FUTIMENS
    struct timespec aTimespecs[2];
    if (pAccessTime && pModificationTime)
    {
        memcpy(&aTimespecs[0], pAccessTime, sizeof(struct timespec));
        memcpy(&aTimespecs[1], pModificationTime, sizeof(struct timespec));
    }
    else
    {
        RTFSOBJINFO ObjInfo;
        int rc = RTFileQueryInfo(hFile, &ObjInfo, RTFSOBJATTRADD_UNIX);
        if (RT_FAILURE(rc))
            return rc;
        memcpy(&aTimespecs[0], pAccessTime ? pAccessTime : &ObjInfo.AccessTime, sizeof(struct timespec));
        memcpy(&aTimespecs[1], pModificationTime ? pModificationTime : &ObjInfo.ModificationTime, sizeof(struct timespec));
    }

    if (futimens(RTFileToNative(hFile), aTimespecs))
    {
        int rc = RTErrConvertFromErrno(errno);
        Log(("RTFileSetTimes(%RTfile,%p,%p,,): returns %Rrc\n", hFile, pAccessTime, pModificationTime, rc));
        return rc;
    }
#else
    /*
     * Convert the input to timeval, getting the missing one if necessary,
     * and call the API which does the change.
     */
    struct timeval aTimevals[2];
    if (pAccessTime && pModificationTime)
    {
        RTTimeSpecGetTimeval(pAccessTime,       &aTimevals[0]);
        RTTimeSpecGetTimeval(pModificationTime, &aTimevals[1]);
    }
    else
    {
        RTFSOBJINFO ObjInfo;
        int rc = RTFileQueryInfo(hFile, &ObjInfo, RTFSOBJATTRADD_UNIX);
        if (RT_FAILURE(rc))
            return rc;
        RTTimeSpecGetTimeval(pAccessTime        ? pAccessTime       : &ObjInfo.AccessTime,       &aTimevals[0]);
        RTTimeSpecGetTimeval(pModificationTime  ? pModificationTime : &ObjInfo.ModificationTime, &aTimevals[1]);
    }

    /* XXX this falls back to utimes("/proc/self/fd/...",...) for older kernels/glibcs and this
     * will not work for hardened builds where this directory is owned by root.root and mode 0500 */
    if (futimes(RTFileToNative(hFile), aTimevals))
    {
        int rc = RTErrConvertFromErrno(errno);
        Log(("RTFileSetTimes(%RTfile,%p,%p,,): returns %Rrc\n", hFile, pAccessTime, pModificationTime, rc));
        return rc;
    }
#endif
    return VINF_SUCCESS;
}