/*
 * Copyright 1999, 2000 Juergen Schmied
 *
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation; either
 * version 2.1 of the License, or (at your option) any later version.
 *
 * This library is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with this library; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
 */

#include "config.h"
#include "wine/port.h"

#include <stdlib.h>
#include <string.h>
#include <stdio.h>
#include <errno.h>
#include <assert.h>
#ifdef HAVE_UNISTD_H
# include <unistd.h>
#endif
#ifdef HAVE_SYS_ERRNO_H
#include <sys/errno.h>
#endif
#ifdef HAVE_LINUX_MAJOR_H
# include <linux/major.h>
#endif
#ifdef HAVE_SYS_STATVFS_H
# include <sys/statvfs.h>
#endif
#ifdef HAVE_SYS_PARAM_H
# include <sys/param.h>
#endif
#ifdef HAVE_SYS_TIME_H
# include <sys/time.h>
#endif
#ifdef HAVE_SYS_IOCTL_H
#include <sys/ioctl.h>
#endif
#ifdef HAVE_POLL_H
#include <poll.h>
#endif
#ifdef HAVE_SYS_POLL_H
#include <sys/poll.h>
#endif
#ifdef HAVE_SYS_SOCKET_H
#include <sys/socket.h>
#endif
#ifdef HAVE_UTIME_H
# include <utime.h>
#endif
#ifdef HAVE_SYS_VFS_H
# include <sys/vfs.h>
#endif
#ifdef HAVE_SYS_MOUNT_H
# include <sys/mount.h>
#endif
#ifdef HAVE_SYS_STATFS_H
# include <sys/statfs.h>
#endif

#define NONAMELESSUNION
#define NONAMELESSSTRUCT
#include "ntstatus.h"
#define WIN32_NO_STATUS
#include "wine/unicode.h"
#include "wine/debug.h"
#include "wine/server.h"
#include "ntdll_misc.h"

#include "winternl.h"
#include "winioctl.h"
#include "ddk/ntddser.h"

WINE_DEFAULT_DEBUG_CHANNEL(ntdll);

mode_t FILE_umask = 0;

#define SECSPERDAY         86400
#define SECS_1601_TO_1970  ((369 * 365 + 89) * (ULONGLONG)SECSPERDAY)

/**************************************************************************
 *                 NtOpenFile				[NTDLL.@]
 *                 ZwOpenFile				[NTDLL.@]
 *
 * Open a file.
 *
 * PARAMS
 *  handle    [O] Variable that receives the file handle on return
 *  access    [I] Access desired by the caller to the file
 *  attr      [I] Structure describing the file to be opened
 *  io        [O] Receives details about the result of the operation
 *  sharing   [I] Type of shared access the caller requires
 *  options   [I] Options for the file open
 *
 * RETURNS
 *  Success: 0. FileHandle and IoStatusBlock are updated.
 *  Failure: An NTSTATUS error code describing the error.
 */
NTSTATUS WINAPI NtOpenFile( PHANDLE handle, ACCESS_MASK access,
                            POBJECT_ATTRIBUTES attr, PIO_STATUS_BLOCK io,
                            ULONG sharing, ULONG options )
{
    return NtCreateFile( handle, access, attr, io, NULL, 0,
                         sharing, FILE_OPEN, options, NULL, 0 );
}

/**************************************************************************
 *		NtCreateFile				[NTDLL.@]
 *		ZwCreateFile				[NTDLL.@]
 *
 * Either create a new file or directory, or open an existing file, device,
 * directory or volume.
 *
 * PARAMS
 *	handle       [O] Points to a variable which receives the file handle on return
 *	access       [I] Desired access to the file
 *	attr         [I] Structure describing the file
 *	io           [O] Receives information about the operation on return
 *	alloc_size   [I] Initial size of the file in bytes
 *	attributes   [I] Attributes to create the file with
 *	sharing      [I] Type of shared access the caller would like to the file
 *	disposition  [I] Specifies what to do, depending on whether the file already exists
 *	options      [I] Options for creating a new file
 *	ea_buffer    [I] Pointer to an extended attributes buffer
 *	ea_length    [I] Length of ea_buffer
 *
 * RETURNS
 *  Success: 0. handle and io are updated.
 *  Failure: An NTSTATUS error code describing the error.
 */
NTSTATUS WINAPI NtCreateFile( PHANDLE handle, ACCESS_MASK access, POBJECT_ATTRIBUTES attr,
                              PIO_STATUS_BLOCK io, PLARGE_INTEGER alloc_size,
                              ULONG attributes, ULONG sharing, ULONG disposition,
                              ULONG options, PVOID ea_buffer, ULONG ea_length )
{
    ANSI_STRING unix_name;
    int created = FALSE;

    TRACE("handle=%p access=%08x name=%s objattr=%08x root=%p sec=%p io=%p alloc_size=%p\n"
          "attr=%08x sharing=%08x disp=%d options=%08x ea=%p.0x%08x\n",
          handle, access, debugstr_us(attr->ObjectName), attr->Attributes,
          attr->RootDirectory, attr->SecurityDescriptor, io, alloc_size,
          attributes, sharing, disposition, options, ea_buffer, ea_length );

    if (!attr || !attr->ObjectName) return STATUS_INVALID_PARAMETER;

    if (alloc_size) FIXME( "alloc_size not supported\n" );

    if (attr->RootDirectory)
    {
        FIXME( "RootDirectory %p not supported\n", attr->RootDirectory );
        return STATUS_OBJECT_NAME_NOT_FOUND;
    }

    io->u.Status = wine_nt_to_unix_file_name( attr->ObjectName, &unix_name, disposition,
                                              !(attr->Attributes & OBJ_CASE_INSENSITIVE) );

    if (io->u.Status == STATUS_BAD_DEVICE_TYPE)
    {
        SERVER_START_REQ( open_file_object )
        {
            req->access     = access;
            req->attributes = attr->Attributes;
            req->rootdir    = attr->RootDirectory;
            req->sharing    = sharing;
            req->options    = options;
            wine_server_add_data( req, attr->ObjectName->Buffer, attr->ObjectName->Length );
            io->u.Status = wine_server_call( req );
            *handle = reply->handle;
        }
        SERVER_END_REQ;
        if (io->u.Status == STATUS_SUCCESS) io->Information = FILE_OPENED;
        return io->u.Status;
    }

    if (io->u.Status == STATUS_NO_SUCH_FILE &&
        disposition != FILE_OPEN && disposition != FILE_OVERWRITE)
    {
        created = TRUE;
        io->u.Status = STATUS_SUCCESS;
    }

    if (io->u.Status == STATUS_SUCCESS)
    {
        struct security_descriptor *sd = NULL;
        struct object_attributes objattr;

        objattr.rootdir = 0;
        objattr.sd_len = 0;
        objattr.name_len = 0;
        if (attr)
        {
            io->u.Status = NTDLL_create_struct_sd( attr->SecurityDescriptor, &sd, &objattr.sd_len );
            if (io->u.Status != STATUS_SUCCESS)
            {
                RtlFreeAnsiString( &unix_name );
                return io->u.Status;
            }
        }

        SERVER_START_REQ( create_file )
        {
            req->access     = access;
            req->attributes = attr->Attributes;
            req->sharing    = sharing;
            req->create     = disposition;
            req->options    = options;
            req->attrs      = attributes;
            wine_server_add_data( req, &objattr, sizeof(objattr) );
            if (objattr.sd_len) wine_server_add_data( req, sd, objattr.sd_len );
            wine_server_add_data( req, unix_name.Buffer, unix_name.Length );
            io->u.Status = wine_server_call( req );
            *handle = reply->handle;
        }
        SERVER_END_REQ;
        NTDLL_free_struct_sd( sd );
        RtlFreeAnsiString( &unix_name );
    }
    else WARN("%s not found (%x)\n", debugstr_us(attr->ObjectName), io->u.Status );

    if (io->u.Status == STATUS_SUCCESS)
    {
        if (created) io->Information = FILE_CREATED;
        else switch(disposition)
        {
        case FILE_SUPERSEDE:
            io->Information = FILE_SUPERSEDED;
            break;
        case FILE_CREATE:
            io->Information = FILE_CREATED;
            break;
        case FILE_OPEN:
        case FILE_OPEN_IF:
            io->Information = FILE_OPENED;
            break;
        case FILE_OVERWRITE:
        case FILE_OVERWRITE_IF:
            io->Information = FILE_OVERWRITTEN;
            break;
        }
    }

    return io->u.Status;
}

/***********************************************************************
 *                  Asynchronous file I/O                              *
 */

struct async_fileio
{
    HANDLE              handle;
    PIO_APC_ROUTINE     apc;
    void               *apc_arg;
};

typedef struct
{
    struct async_fileio io;
    char*               buffer;
    unsigned int        already;
    unsigned int        count;
    BOOL                avail_mode;
} async_fileio_read;

typedef struct
{
    struct async_fileio io;
    const char         *buffer;
    unsigned int        already;
    unsigned int        count;
} async_fileio_write;


/* callback for file I/O user APC */
static void WINAPI fileio_apc( void *arg, IO_STATUS_BLOCK *io, ULONG reserved )
{
    struct async_fileio *async = arg;
    if (async->apc) async->apc( async->apc_arg, io, reserved );
    RtlFreeHeap( GetProcessHeap(), 0, async );
}

/***********************************************************************
 *           FILE_GetNtStatus(void)
 *
 * Retrieve the Nt Status code from errno.
 * Try to be consistent with FILE_SetDosError().
 */
NTSTATUS FILE_GetNtStatus(void)
{
    int err = errno;

    TRACE( "errno = %d\n", errno );
    switch (err)
    {
    case EAGAIN:    return STATUS_SHARING_VIOLATION;
    case EBADF:     return STATUS_INVALID_HANDLE;
    case EBUSY:     return STATUS_DEVICE_BUSY;
    case ENOSPC:    return STATUS_DISK_FULL;
    case EPERM:
    case EROFS:
    case EACCES:    return STATUS_ACCESS_DENIED;
    case ENOTDIR:   return STATUS_OBJECT_PATH_NOT_FOUND;
    case ENOENT:    return STATUS_OBJECT_NAME_NOT_FOUND;
    case EISDIR:    return STATUS_FILE_IS_A_DIRECTORY;
    case EMFILE:
    case ENFILE:    return STATUS_TOO_MANY_OPENED_FILES;
    case EINVAL:    return STATUS_INVALID_PARAMETER;
    case ENOTEMPTY: return STATUS_DIRECTORY_NOT_EMPTY;
    case EPIPE:     return STATUS_PIPE_DISCONNECTED;
    case EIO:       return STATUS_DEVICE_NOT_READY;
#ifdef ENOMEDIUM
    case ENOMEDIUM: return STATUS_NO_MEDIA_IN_DEVICE;
#endif
    case ENXIO:     return STATUS_NO_SUCH_DEVICE;
    case ENOTTY:
    case EOPNOTSUPP:return STATUS_NOT_SUPPORTED;
    case ECONNRESET:return STATUS_PIPE_DISCONNECTED;
    case EFAULT:    return STATUS_ACCESS_VIOLATION;
    case ESPIPE:    return STATUS_ILLEGAL_FUNCTION;
    case ENOEXEC:   /* ?? */
    case EEXIST:    /* ?? */
    default:
        FIXME( "Converting errno %d to STATUS_UNSUCCESSFUL\n", err );
        return STATUS_UNSUCCESSFUL;
    }
}

/***********************************************************************
 *             FILE_AsyncReadService      (INTERNAL)
 */
static NTSTATUS FILE_AsyncReadService(void *user, PIO_STATUS_BLOCK iosb, NTSTATUS status, ULONG_PTR *total)
{
    async_fileio_read *fileio = user;
    int fd, needs_close, result;

    switch (status)
    {
    case STATUS_ALERTED: /* got some new data */
        /* check to see if the data is ready (non-blocking) */
        if ((status = server_get_unix_fd( fileio->io.handle, FILE_READ_DATA, &fd,
                                          &needs_close, NULL, NULL )))
            break;

        result = read(fd, &fileio->buffer[fileio->already], fileio->count - fileio->already);
        if (needs_close) close( fd );

        if (result < 0)
        {
            if (errno == EAGAIN || errno == EINTR)
                status = STATUS_PENDING;
            else /* check to see if the transfer is complete */
                status = FILE_GetNtStatus();
        }
        else if (result == 0)
        {
            status = fileio->already ? STATUS_SUCCESS : STATUS_PIPE_BROKEN;
        }
        else
        {
            fileio->already += result;
            if (fileio->already >= fileio->count || fileio->avail_mode)
                status = STATUS_SUCCESS;
            else
            {
                /* if we only have to read the available data, and none is available,
                 * simply cancel the request. If data was available, it has been read
                 * while in by previous call (NtDelayExecution)
                 */
                status = (fileio->avail_mode) ? STATUS_SUCCESS : STATUS_PENDING;
            }
        }
        break;

    case STATUS_TIMEOUT:
    case STATUS_IO_TIMEOUT:
        if (fileio->already) status = STATUS_SUCCESS;
        break;
    }
    if (status != STATUS_PENDING)
    {
        iosb->u.Status = status;
        iosb->Information = *total = fileio->already;
    }
    return status;
}

struct io_timeouts
{
    int interval;   /* max interval between two bytes */
    int total;      /* total timeout for the whole operation */
    int end_time;   /* absolute time of end of operation */
};

/* retrieve the I/O timeouts to use for a given handle */
static NTSTATUS get_io_timeouts( HANDLE handle, enum server_fd_type type, ULONG count, BOOL is_read,
                                 struct io_timeouts *timeouts )
{
    NTSTATUS status = STATUS_SUCCESS;

    timeouts->interval = timeouts->total = -1;

    switch(type)
    {
    case FD_TYPE_SERIAL:
        {
            /* GetCommTimeouts */
            SERIAL_TIMEOUTS st;
            IO_STATUS_BLOCK io;

            status = NtDeviceIoControlFile( handle, NULL, NULL, NULL, &io,
                                            IOCTL_SERIAL_GET_TIMEOUTS, NULL, 0, &st, sizeof(st) );
            if (status) break;

            if (is_read)
            {
                if (st.ReadIntervalTimeout)
                    timeouts->interval = st.ReadIntervalTimeout;

                if (st.ReadTotalTimeoutMultiplier || st.ReadTotalTimeoutConstant)
                {
                    timeouts->total = st.ReadTotalTimeoutConstant;
                    if (st.ReadTotalTimeoutMultiplier != MAXDWORD)
                        timeouts->total += count * st.ReadTotalTimeoutMultiplier;
                }
                else if (st.ReadIntervalTimeout == MAXDWORD)
                    timeouts->interval = timeouts->total = 0;
            }
            else  /* write */
            {
                if (st.WriteTotalTimeoutMultiplier || st.WriteTotalTimeoutConstant)
                {
                    timeouts->total = st.WriteTotalTimeoutConstant;
                    if (st.WriteTotalTimeoutMultiplier != MAXDWORD)
                        timeouts->total += count * st.WriteTotalTimeoutMultiplier;
                }
            }
        }
        break;
    case FD_TYPE_MAILSLOT:
        if (is_read)
        {
            timeouts->interval = 0;  /* return as soon as we got something */
            SERVER_START_REQ( set_mailslot_info )
            {
                req->handle = handle;
                req->flags = 0;
                if (!(status = wine_server_call( req )) &&
                    reply->read_timeout != TIMEOUT_INFINITE)
                    timeouts->total = reply->read_timeout / -10000;
            }
            SERVER_END_REQ;
        }
        break;
    case FD_TYPE_SOCKET:
    case FD_TYPE_PIPE:
    case FD_TYPE_CHAR:
        if (is_read) timeouts->interval = 0;  /* return as soon as we got something */
        break;
    default:
        break;
    }
    if (timeouts->total != -1) timeouts->end_time = NtGetTickCount() + timeouts->total;
    return STATUS_SUCCESS;
}


/* retrieve the timeout for the next wait, in milliseconds */
static inline int get_next_io_timeout( const struct io_timeouts *timeouts, ULONG already )
{
    int ret = -1;

    if (timeouts->total != -1)
    {
        ret = timeouts->end_time - NtGetTickCount();
        if (ret < 0) ret = 0;
    }
    if (already && timeouts->interval != -1)
    {
        if (ret == -1 || ret > timeouts->interval) ret = timeouts->interval;
    }
    return ret;
}


/* retrieve the avail_mode flag for async reads */
static NTSTATUS get_io_avail_mode( HANDLE handle, enum server_fd_type type, BOOL *avail_mode )
{
    NTSTATUS status = STATUS_SUCCESS;

    switch(type)
    {
    case FD_TYPE_SERIAL:
        {
            /* GetCommTimeouts */
            SERIAL_TIMEOUTS st;
            IO_STATUS_BLOCK io;

            status = NtDeviceIoControlFile( handle, NULL, NULL, NULL, &io,
                                            IOCTL_SERIAL_GET_TIMEOUTS, NULL, 0, &st, sizeof(st) );
            if (status) break;
            *avail_mode = (!st.ReadTotalTimeoutMultiplier &&
                           !st.ReadTotalTimeoutConstant &&
                           st.ReadIntervalTimeout == MAXDWORD);
        }
        break;
    case FD_TYPE_MAILSLOT:
    case FD_TYPE_SOCKET:
    case FD_TYPE_PIPE:
    case FD_TYPE_CHAR:
        *avail_mode = TRUE;
        break;
    default:
        *avail_mode = FALSE;
        break;
    }
    return status;
}


/******************************************************************************
 *  NtReadFile					[NTDLL.@]
 *  ZwReadFile					[NTDLL.@]
 *
 * Read from an open file handle.
 *
 * PARAMS
 *  FileHandle    [I] Handle returned from ZwOpenFile() or ZwCreateFile()
 *  Event         [I] Event to signal upon completion (or NULL)
 *  ApcRoutine    [I] Callback to call upon completion (or NULL)
 *  ApcContext    [I] Context for ApcRoutine (or NULL)
 *  IoStatusBlock [O] Receives information about the operation on return
 *  Buffer        [O] Destination for the data read
 *  Length        [I] Size of Buffer
 *  ByteOffset    [O] Destination for the new file pointer position (or NULL)
 *  Key           [O] Function unknown (may be NULL)
 *
 * RETURNS
 *  Success: 0. IoStatusBlock is updated, and the Information member contains
 *           The number of bytes read.
 *  Failure: An NTSTATUS error code describing the error.
 */
NTSTATUS WINAPI NtReadFile(HANDLE hFile, HANDLE hEvent,
                           PIO_APC_ROUTINE apc, void* apc_user,
                           PIO_STATUS_BLOCK io_status, void* buffer, ULONG length,
                           PLARGE_INTEGER offset, PULONG key)
{
    int result, unix_handle, needs_close, timeout_init_done = 0;
    unsigned int options;
    struct io_timeouts timeouts;
    NTSTATUS status;
    ULONG total = 0;
    enum server_fd_type type;
    ULONG_PTR cvalue = apc ? 0 : (ULONG_PTR)apc_user;

    TRACE("(%p,%p,%p,%p,%p,%p,0x%08x,%p,%p),partial stub!\n",
          hFile,hEvent,apc,apc_user,io_status,buffer,length,offset,key);

    if (!io_status) return STATUS_ACCESS_VIOLATION;

    status = server_get_unix_fd( hFile, FILE_READ_DATA, &unix_handle,
                                 &needs_close, &type, &options );
    if (status) return status;

    if (type == FD_TYPE_FILE && offset && offset->QuadPart != (LONGLONG)-2 /* FILE_USE_FILE_POINTER_POSITION */ )
    {
        /* async I/O doesn't make sense on regular files */
        while ((result = pread( unix_handle, buffer, length, offset->QuadPart )) == -1)
        {
            if (errno != EINTR)
            {
                status = FILE_GetNtStatus();
                goto done;
            }
        }
        if (options & (FILE_SYNCHRONOUS_IO_ALERT | FILE_SYNCHRONOUS_IO_NONALERT))
            /* update file pointer position */
            lseek( unix_handle, offset->QuadPart + result, SEEK_SET );

        total = result;
        status = total ? STATUS_SUCCESS : STATUS_END_OF_FILE;
        goto done;
    }

    for (;;)
    {
        if ((result = read( unix_handle, (char *)buffer + total, length - total )) >= 0)
        {
            total += result;
            if (!result || total == length)
            {
                if (total)
                {
                    status = STATUS_SUCCESS;
                    goto done;
                }
                switch (type)
                {
                case FD_TYPE_FILE:
                case FD_TYPE_CHAR:
                    status = STATUS_END_OF_FILE;
                    goto done;
                case FD_TYPE_SERIAL:
                    break;
                default:
                    status = STATUS_PIPE_BROKEN;
                    goto done;
                }
            }
        }
        else
        {
            if (errno == EINTR) continue;
            if (errno != EAGAIN)
            {
                status = FILE_GetNtStatus();
                goto done;
            }
        }

        if (!(options & (FILE_SYNCHRONOUS_IO_ALERT | FILE_SYNCHRONOUS_IO_NONALERT)))
        {
            async_fileio_read *fileio;
            BOOL avail_mode;

            if ((status = get_io_avail_mode( hFile, type, &avail_mode )))
                goto err;
            if (total && avail_mode)
            {
                status = STATUS_SUCCESS;
                goto done;
            }

            if (!(fileio = RtlAllocateHeap(GetProcessHeap(), 0, sizeof(*fileio))))
            {
                status = STATUS_NO_MEMORY;
                goto err;
            }
            fileio->io.handle  = hFile;
            fileio->io.apc     = apc;
            fileio->io.apc_arg = apc_user;
            fileio->already = total;
            fileio->count = length;
            fileio->buffer = buffer;
            fileio->avail_mode = avail_mode;

            SERVER_START_REQ( register_async )
            {
                req->handle = hFile;
                req->type   = ASYNC_TYPE_READ;
                req->count  = length;
                req->async.callback = FILE_AsyncReadService;
                req->async.iosb     = io_status;
                req->async.arg      = fileio;
                req->async.apc      = fileio_apc;
                req->async.event    = hEvent;
                req->async.cvalue   = cvalue;
                status = wine_server_call( req );
            }
            SERVER_END_REQ;

            if (status != STATUS_PENDING) RtlFreeHeap( GetProcessHeap(), 0, fileio );
            goto err;
        }
        else  /* synchronous read, wait for the fd to become ready */
        {
            struct pollfd pfd;
            int ret, timeout;

            if (!timeout_init_done)
            {
                timeout_init_done = 1;
                if ((status = get_io_timeouts( hFile, type, length, TRUE, &timeouts )))
                    goto err;
                if (hEvent) NtResetEvent( hEvent, NULL );
            }
            timeout = get_next_io_timeout( &timeouts, total );

            pfd.fd = unix_handle;
            pfd.events = POLLIN;

            if (!timeout || !(ret = poll( &pfd, 1, timeout )))
            {
                if (total)  /* return with what we got so far */
                    status = STATUS_SUCCESS;
                else
                    status = (type == FD_TYPE_MAILSLOT) ? STATUS_IO_TIMEOUT : STATUS_TIMEOUT;
                goto done;
            }
            if (ret == -1 && errno != EINTR)
            {
                status = FILE_GetNtStatus();
                goto done;
            }
            /* will now restart the read */
        }
    }

done:
    if (cvalue) NTDLL_AddCompletion( hFile, cvalue, status, total );

err:
    if (needs_close) close( unix_handle );
    if (status == STATUS_SUCCESS)
    {
        io_status->u.Status = status;
        io_status->Information = total;
        TRACE("= SUCCESS (%u)\n", total);
        if (hEvent) NtSetEvent( hEvent, NULL );
        if (apc) NtQueueApcThread( GetCurrentThread(), (PNTAPCFUNC)apc,
                                   (ULONG_PTR)apc_user, (ULONG_PTR)io_status, 0 );
    }
    else
    {
        TRACE("= 0x%08x\n", status);
        if (status != STATUS_PENDING && hEvent) NtResetEvent( hEvent, NULL );
    }
    return status;
}


/******************************************************************************
 *  NtReadFileScatter   [NTDLL.@]
 *  ZwReadFileScatter   [NTDLL.@]
 */
NTSTATUS WINAPI NtReadFileScatter( HANDLE file, HANDLE event, PIO_APC_ROUTINE apc, void *apc_user,
                                   PIO_STATUS_BLOCK io_status, FILE_SEGMENT_ELEMENT *segments,
                                   ULONG length, PLARGE_INTEGER offset, PULONG key )
{
    size_t page_size = getpagesize();
    int result, unix_handle, needs_close;
    unsigned int options;
    NTSTATUS status;
    ULONG pos = 0, total = 0;
    enum server_fd_type type;
    ULONG_PTR cvalue = apc ? 0 : (ULONG_PTR)apc_user;

    TRACE( "(%p,%p,%p,%p,%p,%p,0x%08x,%p,%p),partial stub!\n",
           file, event, apc, apc_user, io_status, segments, length, offset, key);

    if (length % page_size) return STATUS_INVALID_PARAMETER;
    if (!io_status) return STATUS_ACCESS_VIOLATION;

    status = server_get_unix_fd( file, FILE_READ_DATA, &unix_handle,
                                 &needs_close, &type, &options );
    if (status) return status;

    if ((type != FD_TYPE_FILE) ||
        (options & (FILE_SYNCHRONOUS_IO_ALERT | FILE_SYNCHRONOUS_IO_NONALERT)) ||
        !(options & FILE_NO_INTERMEDIATE_BUFFERING))
    {
        status = STATUS_INVALID_PARAMETER;
        goto error;
    }

    while (length)
    {
        if (offset && offset->QuadPart != (LONGLONG)-2 /* FILE_USE_FILE_POINTER_POSITION */)
            result = pread( unix_handle, (char *)segments->Buffer + pos,
                            page_size - pos, offset->QuadPart + total );
        else
            result = read( unix_handle, (char *)segments->Buffer + pos, page_size - pos );

        if (result == -1)
        {
            if (errno == EINTR) continue;
            status = FILE_GetNtStatus();
            break;
        }
        if (!result)
        {
            status = STATUS_END_OF_FILE;
            break;
        }
        total += result;
        length -= result;
        if ((pos += result) == page_size)
        {
            pos = 0;
            segments++;
        }
    }

    if (cvalue) NTDLL_AddCompletion( file, cvalue, status, total );

 error:
    if (needs_close) close( unix_handle );
    if (status == STATUS_SUCCESS)
    {
        io_status->u.Status = status;
        io_status->Information = total;
        TRACE("= SUCCESS (%u)\n", total);
        if (event) NtSetEvent( event, NULL );
        if (apc) NtQueueApcThread( GetCurrentThread(), (PNTAPCFUNC)apc,
                                   (ULONG_PTR)apc_user, (ULONG_PTR)io_status, 0 );
    }
    else
    {
        TRACE("= 0x%08x\n", status);
        if (status != STATUS_PENDING && event) NtResetEvent( event, NULL );
    }
    return status;
}


/***********************************************************************
 *             FILE_AsyncWriteService      (INTERNAL)
 */
static NTSTATUS FILE_AsyncWriteService(void *user, IO_STATUS_BLOCK *iosb, NTSTATUS status, ULONG_PTR *total)
{
    async_fileio_write *fileio = user;
    int result, fd, needs_close;
    enum server_fd_type type;

    switch (status)
    {
    case STATUS_ALERTED:
        /* write some data (non-blocking) */
        if ((status = server_get_unix_fd( fileio->io.handle, FILE_WRITE_DATA, &fd,
                                          &needs_close, &type, NULL )))
            break;

        if (!fileio->count && (type == FD_TYPE_MAILSLOT || type == FD_TYPE_PIPE || type == FD_TYPE_SOCKET))
            result = send( fd, fileio->buffer, 0, 0 );
        else
            result = write( fd, &fileio->buffer[fileio->already], fileio->count - fileio->already );

        if (needs_close) close( fd );

        if (result < 0)
        {
            if (errno == EAGAIN || errno == EINTR) status = STATUS_PENDING;
            else status = FILE_GetNtStatus();
        }
        else
        {
            fileio->already += result;
            status = (fileio->already < fileio->count) ? STATUS_PENDING : STATUS_SUCCESS;
        }
        break;

    case STATUS_TIMEOUT:
    case STATUS_IO_TIMEOUT:
        if (fileio->already) status = STATUS_SUCCESS;
        break;
    }
    if (status != STATUS_PENDING)
    {
        iosb->u.Status = status;
        iosb->Information = *total = fileio->already;
    }
    return status;
}

/******************************************************************************
 *  NtWriteFile					[NTDLL.@]
 *  ZwWriteFile					[NTDLL.@]
 *
 * Write to an open file handle.
 *
 * PARAMS
 *  FileHandle    [I] Handle returned from ZwOpenFile() or ZwCreateFile()
 *  Event         [I] Event to signal upon completion (or NULL)
 *  ApcRoutine    [I] Callback to call upon completion (or NULL)
 *  ApcContext    [I] Context for ApcRoutine (or NULL)
 *  IoStatusBlock [O] Receives information about the operation on return
 *  Buffer        [I] Source for the data to write
 *  Length        [I] Size of Buffer
 *  ByteOffset    [O] Destination for the new file pointer position (or NULL)
 *  Key           [O] Function unknown (may be NULL)
 *
 * RETURNS
 *  Success: 0. IoStatusBlock is updated, and the Information member contains
 *           The number of bytes written.
 *  Failure: An NTSTATUS error code describing the error.
 */
NTSTATUS WINAPI NtWriteFile(HANDLE hFile, HANDLE hEvent,
                            PIO_APC_ROUTINE apc, void* apc_user,
                            PIO_STATUS_BLOCK io_status, 
                            const void* buffer, ULONG length,
                            PLARGE_INTEGER offset, PULONG key)
{
    int result, unix_handle, needs_close, timeout_init_done = 0;
    unsigned int options;
    struct io_timeouts timeouts;
    NTSTATUS status;
    ULONG total = 0;
    enum server_fd_type type;
    ULONG_PTR cvalue = apc ? 0 : (ULONG_PTR)apc_user;

    TRACE("(%p,%p,%p,%p,%p,%p,0x%08x,%p,%p)!\n",
          hFile,hEvent,apc,apc_user,io_status,buffer,length,offset,key);

    if (!io_status) return STATUS_ACCESS_VIOLATION;

    status = server_get_unix_fd( hFile, FILE_WRITE_DATA, &unix_handle,
                                 &needs_close, &type, &options );
    if (status) return status;

    if (type == FD_TYPE_FILE && offset && offset->QuadPart != (LONGLONG)-2 /* FILE_USE_FILE_POINTER_POSITION */ )
    {
        /* async I/O doesn't make sense on regular files */
        while ((result = pwrite( unix_handle, buffer, length, offset->QuadPart )) == -1)
        {
            if (errno != EINTR)
            {
                if (errno == EFAULT) status = STATUS_INVALID_USER_BUFFER;
                else status = FILE_GetNtStatus();
                goto done;
            }
        }

        if (options & (FILE_SYNCHRONOUS_IO_ALERT | FILE_SYNCHRONOUS_IO_NONALERT))
            /* update file pointer position */
            lseek( unix_handle, offset->QuadPart + result, SEEK_SET );

        total = result;
        status = STATUS_SUCCESS;
        goto done;
    }

    for (;;)
    {
        /* zero-length writes on sockets may not work with plain write(2) */
        if (!length && (type == FD_TYPE_MAILSLOT || type == FD_TYPE_PIPE || type == FD_TYPE_SOCKET))
            result = send( unix_handle, buffer, 0, 0 );
        else
            result = write( unix_handle, (const char *)buffer + total, length - total );

        if (result >= 0)
        {
            total += result;
            if (total == length)
            {
                status = STATUS_SUCCESS;
                goto done;
            }
        }
        else
        {
            if (errno == EINTR) continue;
            if (errno != EAGAIN)
            {
                if (errno == EFAULT)
                {
                    status = STATUS_INVALID_USER_BUFFER;
                    goto err;
                }
                status = FILE_GetNtStatus();
                goto done;
            }
        }

        if (!(options & (FILE_SYNCHRONOUS_IO_ALERT | FILE_SYNCHRONOUS_IO_NONALERT)))
        {
            async_fileio_write *fileio;

            if (!(fileio = RtlAllocateHeap(GetProcessHeap(), 0, sizeof(*fileio))))
            {
                status = STATUS_NO_MEMORY;
                goto err;
            }
            fileio->io.handle  = hFile;
            fileio->io.apc     = apc;
            fileio->io.apc_arg = apc_user;
            fileio->already = total;
            fileio->count = length;
            fileio->buffer = buffer;

            SERVER_START_REQ( register_async )
            {
                req->handle = hFile;
                req->type   = ASYNC_TYPE_WRITE;
                req->count  = length;
                req->async.callback = FILE_AsyncWriteService;
                req->async.iosb     = io_status;
                req->async.arg      = fileio;
                req->async.apc      = fileio_apc;
                req->async.event    = hEvent;
                req->async.cvalue   = cvalue;
                status = wine_server_call( req );
            }
            SERVER_END_REQ;

            if (status != STATUS_PENDING) RtlFreeHeap( GetProcessHeap(), 0, fileio );
            goto err;
        }
        else  /* synchronous write, wait for the fd to become ready */
        {
            struct pollfd pfd;
            int ret, timeout;

            if (!timeout_init_done)
            {
                timeout_init_done = 1;
                if ((status = get_io_timeouts( hFile, type, length, FALSE, &timeouts )))
                    goto err;
                if (hEvent) NtResetEvent( hEvent, NULL );
            }
            timeout = get_next_io_timeout( &timeouts, total );

            pfd.fd = unix_handle;
            pfd.events = POLLOUT;

            if (!timeout || !(ret = poll( &pfd, 1, timeout )))
            {
                /* return with what we got so far */
                status = total ? STATUS_SUCCESS : STATUS_TIMEOUT;
                goto done;
            }
            if (ret == -1 && errno != EINTR)
            {
                status = FILE_GetNtStatus();
                goto done;
            }
            /* will now restart the write */
        }
    }

done:
    if (cvalue) NTDLL_AddCompletion( hFile, cvalue, status, total );

err:
    if (needs_close) close( unix_handle );
    if (status == STATUS_SUCCESS)
    {
        io_status->u.Status = status;
        io_status->Information = total;
        TRACE("= SUCCESS (%u)\n", total);
        if (hEvent) NtSetEvent( hEvent, NULL );
        if (apc) NtQueueApcThread( GetCurrentThread(), (PNTAPCFUNC)apc,
                                   (ULONG_PTR)apc_user, (ULONG_PTR)io_status, 0 );
    }
    else
    {
        TRACE("= 0x%08x\n", status);
        if (status != STATUS_PENDING && hEvent) NtResetEvent( hEvent, NULL );
    }
    return status;
}


/******************************************************************************
 *  NtWriteFileGather   [NTDLL.@]
 *  ZwWriteFileGather   [NTDLL.@]
 */
NTSTATUS WINAPI NtWriteFileGather( HANDLE file, HANDLE event, PIO_APC_ROUTINE apc, void *apc_user,
                                   PIO_STATUS_BLOCK io_status, FILE_SEGMENT_ELEMENT *segments,
                                   ULONG length, PLARGE_INTEGER offset, PULONG key )
{
    size_t page_size = getpagesize();
    int result, unix_handle, needs_close;
    unsigned int options;
    NTSTATUS status;
    ULONG pos = 0, total = 0;
    enum server_fd_type type;
    ULONG_PTR cvalue = apc ? 0 : (ULONG_PTR)apc_user;

    TRACE( "(%p,%p,%p,%p,%p,%p,0x%08x,%p,%p),partial stub!\n",
           file, event, apc, apc_user, io_status, segments, length, offset, key);

    if (length % page_size) return STATUS_INVALID_PARAMETER;
    if (!io_status) return STATUS_ACCESS_VIOLATION;

    status = server_get_unix_fd( file, FILE_WRITE_DATA, &unix_handle,
                                 &needs_close, &type, &options );
    if (status) return status;

    if ((type != FD_TYPE_FILE) ||
        (options & (FILE_SYNCHRONOUS_IO_ALERT | FILE_SYNCHRONOUS_IO_NONALERT)) ||
        !(options & FILE_NO_INTERMEDIATE_BUFFERING))
    {
        status = STATUS_INVALID_PARAMETER;
        goto error;
    }

    while (length)
    {
        if (offset && offset->QuadPart != (LONGLONG)-2 /* FILE_USE_FILE_POINTER_POSITION */)
            result = pwrite( unix_handle, (char *)segments->Buffer + pos,
                             page_size - pos, offset->QuadPart + total );
        else
            result = write( unix_handle, (char *)segments->Buffer + pos, page_size - pos );

        if (result == -1)
        {
            if (errno == EINTR) continue;
            if (errno == EFAULT)
            {
                status = STATUS_INVALID_USER_BUFFER;
                goto error;
            }
            status = FILE_GetNtStatus();
            break;
        }
        if (!result)
        {
            status = STATUS_DISK_FULL;
            break;
        }
        total += result;
        length -= result;
        if ((pos += result) == page_size)
        {
            pos = 0;
            segments++;
        }
    }

    if (cvalue) NTDLL_AddCompletion( file, cvalue, status, total );

 error:
    if (needs_close) close( unix_handle );
    if (status == STATUS_SUCCESS)
    {
        io_status->u.Status = status;
        io_status->Information = total;
        TRACE("= SUCCESS (%u)\n", total);
        if (event) NtSetEvent( event, NULL );
        if (apc) NtQueueApcThread( GetCurrentThread(), (PNTAPCFUNC)apc,
                                   (ULONG_PTR)apc_user, (ULONG_PTR)io_status, 0 );
    }
    else
    {
        TRACE("= 0x%08x\n", status);
        if (status != STATUS_PENDING && event) NtResetEvent( event, NULL );
    }
    return status;
}


struct async_ioctl
{
    HANDLE          handle;   /* handle to the device */
    void           *buffer;   /* buffer for output */
    ULONG           size;     /* size of buffer */
    PIO_APC_ROUTINE apc;      /* user apc params */
    void           *apc_arg;
};

/* callback for ioctl async I/O completion */
static NTSTATUS ioctl_completion( void *arg, IO_STATUS_BLOCK *io, NTSTATUS status )
{
    struct async_ioctl *async = arg;

    if (status == STATUS_ALERTED)
    {
        SERVER_START_REQ( get_ioctl_result )
        {
            req->handle   = async->handle;
            req->user_arg = async;
            wine_server_set_reply( req, async->buffer, async->size );
            if (!(status = wine_server_call( req )))
                io->Information = wine_server_reply_size( reply );
        }
        SERVER_END_REQ;
    }
    if (status != STATUS_PENDING) io->u.Status = status;
    return status;
}

/* callback for ioctl user APC */
static void WINAPI ioctl_apc( void *arg, IO_STATUS_BLOCK *io, ULONG reserved )
{
    struct async_ioctl *async = arg;
    if (async->apc) async->apc( async->apc_arg, io, reserved );
    RtlFreeHeap( GetProcessHeap(), 0, async );
}

/* do a ioctl call through the server */
static NTSTATUS server_ioctl_file( HANDLE handle, HANDLE event,
                                   PIO_APC_ROUTINE apc, PVOID apc_context,
                                   IO_STATUS_BLOCK *io, ULONG code,
                                   const void *in_buffer, ULONG in_size,
                                   PVOID out_buffer, ULONG out_size )
{
    struct async_ioctl *async;
    NTSTATUS status;
    HANDLE wait_handle;
    ULONG options;
    ULONG_PTR cvalue = apc ? 0 : (ULONG_PTR)apc_context;

    if (!(async = RtlAllocateHeap( GetProcessHeap(), 0, sizeof(*async) )))
        return STATUS_NO_MEMORY;
    async->handle  = handle;
    async->buffer  = out_buffer;
    async->size    = out_size;
    async->apc     = apc;
    async->apc_arg = apc_context;

    SERVER_START_REQ( ioctl )
    {
        req->handle         = handle;
        req->code           = code;
        req->async.callback = ioctl_completion;
        req->async.iosb     = io;
        req->async.arg      = async;
        req->async.apc      = (apc || event) ? ioctl_apc : NULL;
        req->async.event    = event;
        req->async.cvalue   = cvalue;
        wine_server_add_data( req, in_buffer, in_size );
        wine_server_set_reply( req, out_buffer, out_size );
        if (!(status = wine_server_call( req )))
            io->Information = wine_server_reply_size( reply );
        wait_handle = reply->wait;
        options     = reply->options;
    }
    SERVER_END_REQ;

    if (status == STATUS_NOT_SUPPORTED)
        FIXME("Unsupported ioctl %x (device=%x access=%x func=%x method=%x)\n",
              code, code >> 16, (code >> 14) & 3, (code >> 2) & 0xfff, code & 3);

    if (status != STATUS_PENDING) RtlFreeHeap( GetProcessHeap(), 0, async );

    if (wait_handle)
    {
        NtWaitForSingleObject( wait_handle, (options & FILE_SYNCHRONOUS_IO_ALERT), NULL );
        status = io->u.Status;
        NtClose( wait_handle );
        RtlFreeHeap( GetProcessHeap(), 0, async );
    }

    return status;
}


/**************************************************************************
 *		NtDeviceIoControlFile			[NTDLL.@]
 *		ZwDeviceIoControlFile			[NTDLL.@]
 *
 * Perform an I/O control operation on an open file handle.
 *
 * PARAMS
 *  handle         [I] Handle returned from ZwOpenFile() or ZwCreateFile()
 *  event          [I] Event to signal upon completion (or NULL)
 *  apc            [I] Callback to call upon completion (or NULL)
 *  apc_context    [I] Context for ApcRoutine (or NULL)
 *  io             [O] Receives information about the operation on return
 *  code           [I] Control code for the operation to perform
 *  in_buffer      [I] Source for any input data required (or NULL)
 *  in_size        [I] Size of InputBuffer
 *  out_buffer     [O] Source for any output data returned (or NULL)
 *  out_size       [I] Size of OutputBuffer
 *
 * RETURNS
 *  Success: 0. IoStatusBlock is updated.
 *  Failure: An NTSTATUS error code describing the error.
 */
NTSTATUS WINAPI NtDeviceIoControlFile(HANDLE handle, HANDLE event,
                                      PIO_APC_ROUTINE apc, PVOID apc_context,
                                      PIO_STATUS_BLOCK io, ULONG code,
                                      PVOID in_buffer, ULONG in_size,
                                      PVOID out_buffer, ULONG out_size)
{
    ULONG device = (code >> 16);
    NTSTATUS status = STATUS_NOT_SUPPORTED;

    TRACE("(%p,%p,%p,%p,%p,0x%08x,%p,0x%08x,%p,0x%08x)\n",
          handle, event, apc, apc_context, io, code,
          in_buffer, in_size, out_buffer, out_size);

    switch(device)
    {
    case FILE_DEVICE_DISK:
    case FILE_DEVICE_CD_ROM:
    case FILE_DEVICE_DVD:
    case FILE_DEVICE_CONTROLLER:
    case FILE_DEVICE_MASS_STORAGE:
        status = CDROM_DeviceIoControl(handle, event, apc, apc_context, io, code,
                                       in_buffer, in_size, out_buffer, out_size);
        break;
    case FILE_DEVICE_SERIAL_PORT:
        status = COMM_DeviceIoControl(handle, event, apc, apc_context, io, code,
                                      in_buffer, in_size, out_buffer, out_size);
        break;
    case FILE_DEVICE_TAPE:
        status = TAPE_DeviceIoControl(handle, event, apc, apc_context, io, code,
                                      in_buffer, in_size, out_buffer, out_size);
        break;
    }

    if (status == STATUS_NOT_SUPPORTED || status == STATUS_BAD_DEVICE_TYPE)
        status = server_ioctl_file( handle, event, apc, apc_context, io, code,
                                    in_buffer, in_size, out_buffer, out_size );

    if (status != STATUS_PENDING) io->u.Status = status;
    return status;
}


/**************************************************************************
 *              NtFsControlFile                 [NTDLL.@]
 *              ZwFsControlFile                 [NTDLL.@]
 *
 * Perform a file system control operation on an open file handle.
 *
 * PARAMS
 *  handle         [I] Handle returned from ZwOpenFile() or ZwCreateFile()
 *  event          [I] Event to signal upon completion (or NULL)
 *  apc            [I] Callback to call upon completion (or NULL)
 *  apc_context    [I] Context for ApcRoutine (or NULL)
 *  io             [O] Receives information about the operation on return
 *  code           [I] Control code for the operation to perform
 *  in_buffer      [I] Source for any input data required (or NULL)
 *  in_size        [I] Size of InputBuffer
 *  out_buffer     [O] Source for any output data returned (or NULL)
 *  out_size       [I] Size of OutputBuffer
 *
 * RETURNS
 *  Success: 0. IoStatusBlock is updated.
 *  Failure: An NTSTATUS error code describing the error.
 */
NTSTATUS WINAPI NtFsControlFile(HANDLE handle, HANDLE event, PIO_APC_ROUTINE apc,
                                PVOID apc_context, PIO_STATUS_BLOCK io, ULONG code,
                                PVOID in_buffer, ULONG in_size, PVOID out_buffer, ULONG out_size)
{
    NTSTATUS status;

    TRACE("(%p,%p,%p,%p,%p,0x%08x,%p,0x%08x,%p,0x%08x)\n",
          handle, event, apc, apc_context, io, code,
          in_buffer, in_size, out_buffer, out_size);

    if (!io) return STATUS_INVALID_PARAMETER;

    switch(code)
    {
    case FSCTL_DISMOUNT_VOLUME:
        status = server_ioctl_file( handle, event, apc, apc_context, io, code,
                                    in_buffer, in_size, out_buffer, out_size );
        if (!status) status = DIR_unmount_device( handle );
        break;

    case FSCTL_PIPE_PEEK:
        {
            FILE_PIPE_PEEK_BUFFER *buffer = out_buffer;
            int avail = 0, fd, needs_close;

            if (out_size < FIELD_OFFSET( FILE_PIPE_PEEK_BUFFER, Data ))
            {
                status = STATUS_INFO_LENGTH_MISMATCH;
                break;
            }

            if ((status = server_get_unix_fd( handle, FILE_READ_DATA, &fd, &needs_close, NULL, NULL )))
                break;

#ifdef FIONREAD
            if (ioctl( fd, FIONREAD, &avail ) != 0)
            {
                TRACE("FIONREAD failed reason: %s\n",strerror(errno));
                if (needs_close) close( fd );
                status = FILE_GetNtStatus();
                break;
            }
#endif
            if (!avail)  /* check for closed pipe */
            {
                struct pollfd pollfd;
                int ret;

                pollfd.fd = fd;
                pollfd.events = POLLIN;
                pollfd.revents = 0;
                ret = poll( &pollfd, 1, 0 );
                if (ret == -1 || (ret == 1 && (pollfd.revents & (POLLHUP|POLLERR))))
                {
                    if (needs_close) close( fd );
                    status = STATUS_PIPE_BROKEN;
                    break;
                }
            }
            buffer->NamedPipeState    = 0;  /* FIXME */
            buffer->ReadDataAvailable = avail;
            buffer->NumberOfMessages  = 0;  /* FIXME */
            buffer->MessageLength     = 0;  /* FIXME */
            io->Information = FIELD_OFFSET( FILE_PIPE_PEEK_BUFFER, Data );
            status = STATUS_SUCCESS;
            if (avail)
            {
                ULONG data_size = out_size - FIELD_OFFSET( FILE_PIPE_PEEK_BUFFER, Data );
                if (data_size)
                {
                    int res = recv( fd, buffer->Data, data_size, MSG_PEEK );
                    if (res >= 0) io->Information += res;
                }
            }
            if (needs_close) close( fd );
        }
        break;

    case FSCTL_PIPE_DISCONNECT:
        status = server_ioctl_file( handle, event, apc, apc_context, io, code,
                                    in_buffer, in_size, out_buffer, out_size );
        if (!status)
        {
            int fd = server_remove_fd_from_cache( handle );
            if (fd != -1) close( fd );
        }
        break;

    case FSCTL_PIPE_IMPERSONATE:
        FIXME("FSCTL_PIPE_IMPERSONATE: impersonating self\n");
        status = RtlImpersonateSelf( SecurityImpersonation );
        break;

    case FSCTL_LOCK_VOLUME:
    case FSCTL_UNLOCK_VOLUME:
        FIXME("stub! return success - Unsupported fsctl %x (device=%x access=%x func=%x method=%x)\n",
              code, code >> 16, (code >> 14) & 3, (code >> 2) & 0xfff, code & 3);
        status = STATUS_SUCCESS;
        break;

    case FSCTL_PIPE_LISTEN:
    case FSCTL_PIPE_WAIT:
    default:
        status = server_ioctl_file( handle, event, apc, apc_context, io, code,
                                    in_buffer, in_size, out_buffer, out_size );
        break;
    }

    if (status != STATUS_PENDING) io->u.Status = status;
    return status;
}

/******************************************************************************
 *  NtSetVolumeInformationFile		[NTDLL.@]
 *  ZwSetVolumeInformationFile		[NTDLL.@]
 *
 * Set volume information for an open file handle.
 *
 * PARAMS
 *  FileHandle         [I] Handle returned from ZwOpenFile() or ZwCreateFile()
 *  IoStatusBlock      [O] Receives information about the operation on return
 *  FsInformation      [I] Source for volume information
 *  Length             [I] Size of FsInformation
 *  FsInformationClass [I] Type of volume information to set
 *
 * RETURNS
 *  Success: 0. IoStatusBlock is updated.
 *  Failure: An NTSTATUS error code describing the error.
 */
NTSTATUS WINAPI NtSetVolumeInformationFile(
	IN HANDLE FileHandle,
	PIO_STATUS_BLOCK IoStatusBlock,
	PVOID FsInformation,
        ULONG Length,
	FS_INFORMATION_CLASS FsInformationClass)
{
	FIXME("(%p,%p,%p,0x%08x,0x%08x) stub\n",
	FileHandle,IoStatusBlock,FsInformation,Length,FsInformationClass);
	return 0;
}

/******************************************************************************
 *  NtQueryInformationFile		[NTDLL.@]
 *  ZwQueryInformationFile		[NTDLL.@]
 *
 * Get information about an open file handle.
 *
 * PARAMS
 *  hFile    [I] Handle returned from ZwOpenFile() or ZwCreateFile()
 *  io       [O] Receives information about the operation on return
 *  ptr      [O] Destination for file information
 *  len      [I] Size of FileInformation
 *  class    [I] Type of file information to get
 *
 * RETURNS
 *  Success: 0. IoStatusBlock and FileInformation are updated.
 *  Failure: An NTSTATUS error code describing the error.
 */
NTSTATUS WINAPI NtQueryInformationFile( HANDLE hFile, PIO_STATUS_BLOCK io,
                                        PVOID ptr, LONG len, FILE_INFORMATION_CLASS class )
{
    static const size_t info_sizes[] =
    {
        0,
        sizeof(FILE_DIRECTORY_INFORMATION),            /* FileDirectoryInformation */
        sizeof(FILE_FULL_DIRECTORY_INFORMATION),       /* FileFullDirectoryInformation */
        sizeof(FILE_BOTH_DIRECTORY_INFORMATION),       /* FileBothDirectoryInformation */
        sizeof(FILE_BASIC_INFORMATION),                /* FileBasicInformation */
        sizeof(FILE_STANDARD_INFORMATION),             /* FileStandardInformation */
        sizeof(FILE_INTERNAL_INFORMATION),             /* FileInternalInformation */
        sizeof(FILE_EA_INFORMATION),                   /* FileEaInformation */
        sizeof(FILE_ACCESS_INFORMATION),               /* FileAccessInformation */
        sizeof(FILE_NAME_INFORMATION)-sizeof(WCHAR),   /* FileNameInformation */
        sizeof(FILE_RENAME_INFORMATION)-sizeof(WCHAR), /* FileRenameInformation */
        0,                                             /* FileLinkInformation */
        sizeof(FILE_NAMES_INFORMATION)-sizeof(WCHAR),  /* FileNamesInformation */
        sizeof(FILE_DISPOSITION_INFORMATION),          /* FileDispositionInformation */
        sizeof(FILE_POSITION_INFORMATION),             /* FilePositionInformation */
        sizeof(FILE_FULL_EA_INFORMATION),              /* FileFullEaInformation */
        sizeof(FILE_MODE_INFORMATION),                 /* FileModeInformation */
        sizeof(FILE_ALIGNMENT_INFORMATION),            /* FileAlignmentInformation */
        sizeof(FILE_ALL_INFORMATION)-sizeof(WCHAR),    /* FileAllInformation */
        sizeof(FILE_ALLOCATION_INFORMATION),           /* FileAllocationInformation */
        sizeof(FILE_END_OF_FILE_INFORMATION),          /* FileEndOfFileInformation */
        0,                                             /* FileAlternateNameInformation */
        sizeof(FILE_STREAM_INFORMATION)-sizeof(WCHAR), /* FileStreamInformation */
        0,                                             /* FilePipeInformation */
        sizeof(FILE_PIPE_LOCAL_INFORMATION),           /* FilePipeLocalInformation */
        0,                                             /* FilePipeRemoteInformation */
        sizeof(FILE_MAILSLOT_QUERY_INFORMATION),       /* FileMailslotQueryInformation */
        0,                                             /* FileMailslotSetInformation */
        0,                                             /* FileCompressionInformation */
        0,                                             /* FileObjectIdInformation */
        0,                                             /* FileCompletionInformation */
        0,                                             /* FileMoveClusterInformation */
        0,                                             /* FileQuotaInformation */
        0,                                             /* FileReparsePointInformation */
        0,                                             /* FileNetworkOpenInformation */
        0,                                             /* FileAttributeTagInformation */
        0                                              /* FileTrackingInformation */
    };

    struct stat st;
    int fd, needs_close = FALSE;

    TRACE("(%p,%p,%p,0x%08x,0x%08x)\n", hFile, io, ptr, len, class);

    io->Information = 0;

    if (class <= 0 || class >= FileMaximumInformation)
        return io->u.Status = STATUS_INVALID_INFO_CLASS;
    if (!info_sizes[class])
    {
        FIXME("Unsupported class (%d)\n", class);
        return io->u.Status = STATUS_NOT_IMPLEMENTED;
    }
    if (len < info_sizes[class])
        return io->u.Status = STATUS_INFO_LENGTH_MISMATCH;

    if (class != FilePipeLocalInformation)
    {
        if ((io->u.Status = server_get_unix_fd( hFile, 0, &fd, &needs_close, NULL, NULL )))
            return io->u.Status;
    }

    switch (class)
    {
    case FileBasicInformation:
        {
            FILE_BASIC_INFORMATION *info = ptr;

            if (fstat( fd, &st ) == -1)
                io->u.Status = FILE_GetNtStatus();
            else if (!S_ISREG(st.st_mode) && !S_ISDIR(st.st_mode))
                io->u.Status = STATUS_INVALID_INFO_CLASS;
            else
            {
                if (S_ISDIR(st.st_mode)) info->FileAttributes = FILE_ATTRIBUTE_DIRECTORY;
                else info->FileAttributes = FILE_ATTRIBUTE_ARCHIVE;
                if (!(st.st_mode & (S_IWUSR | S_IWGRP | S_IWOTH)))
                    info->FileAttributes |= FILE_ATTRIBUTE_READONLY;
                RtlSecondsSince1970ToTime( st.st_mtime, &info->CreationTime);
                RtlSecondsSince1970ToTime( st.st_mtime, &info->LastWriteTime);
                RtlSecondsSince1970ToTime( st.st_ctime, &info->ChangeTime);
                RtlSecondsSince1970ToTime( st.st_atime, &info->LastAccessTime);
            }
        }
        break;
    case FileStandardInformation:
        {
            FILE_STANDARD_INFORMATION *info = ptr;

            if (fstat( fd, &st ) == -1) io->u.Status = FILE_GetNtStatus();
            else
            {
                if ((info->Directory = S_ISDIR(st.st_mode)))
                {
                    info->AllocationSize.QuadPart = 0;
                    info->EndOfFile.QuadPart      = 0;
                    info->NumberOfLinks           = 1;
                    info->DeletePending           = FALSE;
                }
                else
                {
                    info->AllocationSize.QuadPart = (ULONGLONG)st.st_blocks * 512;
                    info->EndOfFile.QuadPart      = st.st_size;
                    info->NumberOfLinks           = st.st_nlink;
                    info->DeletePending           = FALSE; /* FIXME */
                }
            }
        }
        break;
    case FilePositionInformation:
        {
            FILE_POSITION_INFORMATION *info = ptr;
            off_t res = lseek( fd, 0, SEEK_CUR );
            if (res == (off_t)-1) io->u.Status = FILE_GetNtStatus();
            else info->CurrentByteOffset.QuadPart = res;
        }
        break;
    case FileInternalInformation:
        {
            FILE_INTERNAL_INFORMATION *info = ptr;

            if (fstat( fd, &st ) == -1) io->u.Status = FILE_GetNtStatus();
            else info->IndexNumber.QuadPart = st.st_ino;
        }
        break;
    case FileEaInformation:
        {
            FILE_EA_INFORMATION *info = ptr;
            info->EaSize = 0;
        }
        break;
    case FileEndOfFileInformation:
        {
            FILE_END_OF_FILE_INFORMATION *info = ptr;

            if (fstat( fd, &st ) == -1) io->u.Status = FILE_GetNtStatus();
            else info->EndOfFile.QuadPart = S_ISDIR(st.st_mode) ? 0 : st.st_size;
        }
        break;
    case FileAllInformation:
        {
            FILE_ALL_INFORMATION *info = ptr;

            if (fstat( fd, &st ) == -1) io->u.Status = FILE_GetNtStatus();
            else if (!S_ISREG(st.st_mode) && !S_ISDIR(st.st_mode))
                io->u.Status = STATUS_INVALID_INFO_CLASS;
            else
            {
                if ((info->StandardInformation.Directory = S_ISDIR(st.st_mode)))
                {
                    info->BasicInformation.FileAttributes = FILE_ATTRIBUTE_DIRECTORY;
                    info->StandardInformation.AllocationSize.QuadPart = 0;
                    info->StandardInformation.EndOfFile.QuadPart      = 0;
                    info->StandardInformation.NumberOfLinks           = 1;
                    info->StandardInformation.DeletePending           = FALSE;
                }
                else
                {
                    info->BasicInformation.FileAttributes = FILE_ATTRIBUTE_ARCHIVE;
                    info->StandardInformation.AllocationSize.QuadPart = (ULONGLONG)st.st_blocks * 512;
                    info->StandardInformation.EndOfFile.QuadPart      = st.st_size;
                    info->StandardInformation.NumberOfLinks           = st.st_nlink;
                    info->StandardInformation.DeletePending           = FALSE; /* FIXME */
                }
                if (!(st.st_mode & (S_IWUSR | S_IWGRP | S_IWOTH)))
                    info->BasicInformation.FileAttributes |= FILE_ATTRIBUTE_READONLY;
                RtlSecondsSince1970ToTime( st.st_mtime, &info->BasicInformation.CreationTime);
                RtlSecondsSince1970ToTime( st.st_mtime, &info->BasicInformation.LastWriteTime);
                RtlSecondsSince1970ToTime( st.st_ctime, &info->BasicInformation.ChangeTime);
                RtlSecondsSince1970ToTime( st.st_atime, &info->BasicInformation.LastAccessTime);
                info->InternalInformation.IndexNumber.QuadPart = st.st_ino;
                info->EaInformation.EaSize = 0;
                info->AccessInformation.AccessFlags = 0;  /* FIXME */
                info->PositionInformation.CurrentByteOffset.QuadPart = lseek( fd, 0, SEEK_CUR );
                info->ModeInformation.Mode = 0;  /* FIXME */
                info->AlignmentInformation.AlignmentRequirement = 1;  /* FIXME */
                info->NameInformation.FileNameLength = 0;
                io->Information = sizeof(*info) - sizeof(WCHAR);
            }
        }
        break;
    case FileMailslotQueryInformation:
        {
            FILE_MAILSLOT_QUERY_INFORMATION *info = ptr;

            SERVER_START_REQ( set_mailslot_info )
            {
                req->handle = hFile;
                req->flags = 0;
                io->u.Status = wine_server_call( req );
                if( io->u.Status == STATUS_SUCCESS )
                {
                    info->MaximumMessageSize = reply->max_msgsize;
                    info->MailslotQuota = 0;
                    info->NextMessageSize = 0;
                    info->MessagesAvailable = 0;
                    info->ReadTimeout.QuadPart = reply->read_timeout;
                }
            }
            SERVER_END_REQ;
            if (!io->u.Status)
            {
                char *tmpbuf;
                ULONG size = info->MaximumMessageSize ? info->MaximumMessageSize : 0x10000;
                if (size > 0x10000) size = 0x10000;
                if ((tmpbuf = RtlAllocateHeap( GetProcessHeap(), 0, size )))
                {
                    int fd, needs_close;
                    if (!server_get_unix_fd( hFile, FILE_READ_DATA, &fd, &needs_close, NULL, NULL ))
                    {
                        int res = recv( fd, tmpbuf, size, MSG_PEEK );
                        info->MessagesAvailable = (res > 0);
                        info->NextMessageSize = (res >= 0) ? res : MAILSLOT_NO_MESSAGE;
                        if (needs_close) close( fd );
                    }
                    RtlFreeHeap( GetProcessHeap(), 0, tmpbuf );
                }
            }
        }
        break;
    case FilePipeLocalInformation:
        {
            FILE_PIPE_LOCAL_INFORMATION* pli = ptr;

            SERVER_START_REQ( get_named_pipe_info )
            {
                req->handle = hFile;
                if (!(io->u.Status = wine_server_call( req )))
                {
                    pli->NamedPipeType = (reply->flags & NAMED_PIPE_MESSAGE_STREAM_WRITE) ? 
                        FILE_PIPE_TYPE_MESSAGE : FILE_PIPE_TYPE_BYTE;
                    pli->NamedPipeConfiguration = 0; /* FIXME */
                    pli->MaximumInstances = reply->maxinstances;
                    pli->CurrentInstances = reply->instances;
                    pli->InboundQuota = reply->insize;
                    pli->ReadDataAvailable = 0; /* FIXME */
                    pli->OutboundQuota = reply->outsize;
                    pli->WriteQuotaAvailable = 0; /* FIXME */
                    pli->NamedPipeState = 0; /* FIXME */
                    pli->NamedPipeEnd = (reply->flags & NAMED_PIPE_SERVER_END) ?
                        FILE_PIPE_SERVER_END : FILE_PIPE_CLIENT_END;
                }
            }
            SERVER_END_REQ;
        }
        break;
    default:
        FIXME("Unsupported class (%d)\n", class);
        io->u.Status = STATUS_NOT_IMPLEMENTED;
        break;
    }
    if (needs_close) close( fd );
    if (io->u.Status == STATUS_SUCCESS && !io->Information) io->Information = info_sizes[class];
    return io->u.Status;
}

/******************************************************************************
 *  NtSetInformationFile		[NTDLL.@]
 *  ZwSetInformationFile		[NTDLL.@]
 *
 * Set information about an open file handle.
 *
 * PARAMS
 *  handle  [I] Handle returned from ZwOpenFile() or ZwCreateFile()
 *  io      [O] Receives information about the operation on return
 *  ptr     [I] Source for file information
 *  len     [I] Size of FileInformation
 *  class   [I] Type of file information to set
 *
 * RETURNS
 *  Success: 0. io is updated.
 *  Failure: An NTSTATUS error code describing the error.
 */
NTSTATUS WINAPI NtSetInformationFile(HANDLE handle, PIO_STATUS_BLOCK io,
                                     PVOID ptr, ULONG len, FILE_INFORMATION_CLASS class)
{
    int fd, needs_close;

    TRACE("(%p,%p,%p,0x%08x,0x%08x)\n", handle, io, ptr, len, class);

    io->u.Status = STATUS_SUCCESS;
    switch (class)
    {
    case FileBasicInformation:
        if (len >= sizeof(FILE_BASIC_INFORMATION))
        {
            struct stat st;
            const FILE_BASIC_INFORMATION *info = ptr;

            if ((io->u.Status = server_get_unix_fd( handle, 0, &fd, &needs_close, NULL, NULL )))
                return io->u.Status;

            if (info->LastAccessTime.QuadPart || info->LastWriteTime.QuadPart)
            {
                ULONGLONG sec, nsec;
                struct timeval tv[2];

                if (!info->LastAccessTime.QuadPart || !info->LastWriteTime.QuadPart)
                {

                    tv[0].tv_sec = tv[0].tv_usec = 0;
                    tv[1].tv_sec = tv[1].tv_usec = 0;
                    if (!fstat( fd, &st ))
                    {
                        tv[0].tv_sec = st.st_atime;
                        tv[1].tv_sec = st.st_mtime;
                    }
                }
                if (info->LastAccessTime.QuadPart)
                {
                    sec = RtlLargeIntegerDivide( info->LastAccessTime.QuadPart, 10000000, &nsec );
                    tv[0].tv_sec = sec - SECS_1601_TO_1970;
                    tv[0].tv_usec = (UINT)nsec / 10;
                }
                if (info->LastWriteTime.QuadPart)
                {
                    sec = RtlLargeIntegerDivide( info->LastWriteTime.QuadPart, 10000000, &nsec );
                    tv[1].tv_sec = sec - SECS_1601_TO_1970;
                    tv[1].tv_usec = (UINT)nsec / 10;
                }
                if (futimes( fd, tv ) == -1) io->u.Status = FILE_GetNtStatus();
            }

            if (io->u.Status == STATUS_SUCCESS && info->FileAttributes)
            {
                if (fstat( fd, &st ) == -1) io->u.Status = FILE_GetNtStatus();
                else
                {
                    if (info->FileAttributes & FILE_ATTRIBUTE_READONLY)
                    {
                        if (S_ISDIR( st.st_mode))
                            WARN("FILE_ATTRIBUTE_READONLY ignored for directory.\n");
                        else
                            st.st_mode &= ~0222; /* clear write permission bits */
                    }
                    else
                    {
                        /* add write permission only where we already have read permission */
                        st.st_mode |= (0600 | ((st.st_mode & 044) >> 1)) & (~FILE_umask);
                    }
                    if (fchmod( fd, st.st_mode ) == -1) io->u.Status = FILE_GetNtStatus();
                }
            }

            if (needs_close) close( fd );
        }
        else io->u.Status = STATUS_INVALID_PARAMETER_3;
        break;

    case FilePositionInformation:
        if (len >= sizeof(FILE_POSITION_INFORMATION))
        {
            const FILE_POSITION_INFORMATION *info = ptr;

            if ((io->u.Status = server_get_unix_fd( handle, 0, &fd, &needs_close, NULL, NULL )))
                return io->u.Status;

            if (lseek( fd, info->CurrentByteOffset.QuadPart, SEEK_SET ) == (off_t)-1)
                io->u.Status = FILE_GetNtStatus();

            if (needs_close) close( fd );
        }
        else io->u.Status = STATUS_INVALID_PARAMETER_3;
        break;

    case FileEndOfFileInformation:
        if (len >= sizeof(FILE_END_OF_FILE_INFORMATION))
        {
            struct stat st;
            const FILE_END_OF_FILE_INFORMATION *info = ptr;

            if ((io->u.Status = server_get_unix_fd( handle, 0, &fd, &needs_close, NULL, NULL )))
                return io->u.Status;

            /* first try normal truncate */
            if (ftruncate( fd, (off_t)info->EndOfFile.QuadPart ) != -1) break;

            /* now check for the need to extend the file */
            if (fstat( fd, &st ) != -1 && (off_t)info->EndOfFile.QuadPart > st.st_size)
            {
                static const char zero;

                /* extend the file one byte beyond the requested size and then truncate it */
                /* this should work around ftruncate implementations that can't extend files */
                if (pwrite( fd, &zero, 1, (off_t)info->EndOfFile.QuadPart ) != -1 &&
                    ftruncate( fd, (off_t)info->EndOfFile.QuadPart ) != -1) break;
            }
            io->u.Status = FILE_GetNtStatus();

            if (needs_close) close( fd );
        }
        else io->u.Status = STATUS_INVALID_PARAMETER_3;
        break;

    case FileMailslotSetInformation:
        {
            FILE_MAILSLOT_SET_INFORMATION *info = ptr;

            SERVER_START_REQ( set_mailslot_info )
            {
                req->handle = handle;
                req->flags = MAILSLOT_SET_READ_TIMEOUT;
                req->read_timeout = info->ReadTimeout.QuadPart;
                io->u.Status = wine_server_call( req );
            }
            SERVER_END_REQ;
        }
        break;

    case FileCompletionInformation:
        if (len >= sizeof(FILE_COMPLETION_INFORMATION))
        {
            FILE_COMPLETION_INFORMATION *info = (FILE_COMPLETION_INFORMATION *)ptr;

            SERVER_START_REQ( set_completion_info )
            {
                req->handle   = handle;
                req->chandle  = info->CompletionPort;
                req->ckey     = info->CompletionKey;
                io->u.Status  = wine_server_call( req );
            }
            SERVER_END_REQ;
        } else
            io->u.Status = STATUS_INVALID_PARAMETER_3;
        break;

    default:
        FIXME("Unsupported class (%d)\n", class);
        io->u.Status = STATUS_NOT_IMPLEMENTED;
        break;
    }
    io->Information = 0;
    return io->u.Status;
}


/******************************************************************************
 *              NtQueryFullAttributesFile   (NTDLL.@)
 */
NTSTATUS WINAPI NtQueryFullAttributesFile( const OBJECT_ATTRIBUTES *attr,
                                           FILE_NETWORK_OPEN_INFORMATION *info )
{
    ANSI_STRING unix_name;
    NTSTATUS status;

    if (!(status = wine_nt_to_unix_file_name( attr->ObjectName, &unix_name, FILE_OPEN,
                                              !(attr->Attributes & OBJ_CASE_INSENSITIVE) )))
    {
        struct stat st;

        if (stat( unix_name.Buffer, &st ) == -1)
            status = FILE_GetNtStatus();
        else if (!S_ISREG(st.st_mode) && !S_ISDIR(st.st_mode))
            status = STATUS_INVALID_INFO_CLASS;
        else
        {
            if (S_ISDIR(st.st_mode))
            {
                info->FileAttributes          = FILE_ATTRIBUTE_DIRECTORY;
                info->AllocationSize.QuadPart = 0;
                info->EndOfFile.QuadPart      = 0;
            }
            else
            {
                info->FileAttributes          = FILE_ATTRIBUTE_ARCHIVE;
                info->AllocationSize.QuadPart = (ULONGLONG)st.st_blocks * 512;
                info->EndOfFile.QuadPart      = st.st_size;
            }
            if (!(st.st_mode & (S_IWUSR | S_IWGRP | S_IWOTH)))
                info->FileAttributes |= FILE_ATTRIBUTE_READONLY;
            RtlSecondsSince1970ToTime( st.st_mtime, &info->CreationTime );
            RtlSecondsSince1970ToTime( st.st_mtime, &info->LastWriteTime );
            RtlSecondsSince1970ToTime( st.st_ctime, &info->ChangeTime );
            RtlSecondsSince1970ToTime( st.st_atime, &info->LastAccessTime );
            if (DIR_is_hidden_file( attr->ObjectName ))
                info->FileAttributes |= FILE_ATTRIBUTE_HIDDEN;
        }
        RtlFreeAnsiString( &unix_name );
    }
    else WARN("%s not found (%x)\n", debugstr_us(attr->ObjectName), status );
    return status;
}


/******************************************************************************
 *              NtQueryAttributesFile   (NTDLL.@)
 *              ZwQueryAttributesFile   (NTDLL.@)
 */
NTSTATUS WINAPI NtQueryAttributesFile( const OBJECT_ATTRIBUTES *attr, FILE_BASIC_INFORMATION *info )
{
    FILE_NETWORK_OPEN_INFORMATION full_info;
    NTSTATUS status;

    if (!(status = NtQueryFullAttributesFile( attr, &full_info )))
    {
        info->CreationTime.QuadPart   = full_info.CreationTime.QuadPart;
        info->LastAccessTime.QuadPart = full_info.LastAccessTime.QuadPart;
        info->LastWriteTime.QuadPart  = full_info.LastWriteTime.QuadPart;
        info->ChangeTime.QuadPart     = full_info.ChangeTime.QuadPart;
        info->FileAttributes          = full_info.FileAttributes;
    }
    return status;
}


#if defined(__FreeBSD__) || defined(__FreeBSD_kernel__) || defined(__NetBSD__) || defined(__APPLE__)
/* helper for FILE_GetDeviceInfo to hide some platform differences in fstatfs */
static inline void get_device_info_fstatfs( FILE_FS_DEVICE_INFORMATION *info, const char *fstypename,
                                            unsigned int flags )
{
    if (!strcmp("cd9660", fstypename) || !strcmp("udf", fstypename))
    {
        info->DeviceType = FILE_DEVICE_CD_ROM_FILE_SYSTEM;
        /* Don't assume read-only, let the mount options set it below */
        info->Characteristics |= FILE_REMOVABLE_MEDIA;
    }
    else if (!strcmp("nfs", fstypename) || !strcmp("nwfs", fstypename) ||
             !strcmp("smbfs", fstypename) || !strcmp("afpfs", fstypename))
    {
        info->DeviceType = FILE_DEVICE_NETWORK_FILE_SYSTEM;
        info->Characteristics |= FILE_REMOTE_DEVICE;
    }
    else if (!strcmp("procfs", fstypename))
        info->DeviceType = FILE_DEVICE_VIRTUAL_DISK;
    else
        info->DeviceType = FILE_DEVICE_DISK_FILE_SYSTEM;

    if (flags & MNT_RDONLY)
        info->Characteristics |= FILE_READ_ONLY_DEVICE;

    if (!(flags & MNT_LOCAL))
    {
        info->DeviceType = FILE_DEVICE_NETWORK_FILE_SYSTEM;
        info->Characteristics |= FILE_REMOTE_DEVICE;
    }
}
#endif

static inline int is_device_placeholder( int fd )
{
    static const char wine_placeholder[] = "Wine device placeholder";
    char buffer[sizeof(wine_placeholder)-1];

    if (pread( fd, buffer, sizeof(wine_placeholder) - 1, 0 ) != sizeof(wine_placeholder) - 1)
        return 0;
    return !memcmp( buffer, wine_placeholder, sizeof(wine_placeholder) - 1 );
}

/******************************************************************************
 *              get_device_info
 *
 * Implementation of the FileFsDeviceInformation query for NtQueryVolumeInformationFile.
 */
static NTSTATUS get_device_info( int fd, FILE_FS_DEVICE_INFORMATION *info )
{
    struct stat st;

    info->Characteristics = 0;
    if (fstat( fd, &st ) < 0) return FILE_GetNtStatus();
    if (S_ISCHR( st.st_mode ))
    {
        info->DeviceType = FILE_DEVICE_UNKNOWN;
#ifdef linux
        switch(major(st.st_rdev))
        {
        case MEM_MAJOR:
            info->DeviceType = FILE_DEVICE_NULL;
            break;
        case TTY_MAJOR:
            info->DeviceType = FILE_DEVICE_SERIAL_PORT;
            break;
        case LP_MAJOR:
            info->DeviceType = FILE_DEVICE_PARALLEL_PORT;
            break;
        case SCSI_TAPE_MAJOR:
            info->DeviceType = FILE_DEVICE_TAPE;
            break;
        }
#endif
    }
    else if (S_ISBLK( st.st_mode ))
    {
        info->DeviceType = FILE_DEVICE_DISK;
    }
    else if (S_ISFIFO( st.st_mode ) || S_ISSOCK( st.st_mode ))
    {
        info->DeviceType = FILE_DEVICE_NAMED_PIPE;
    }
    else if (is_device_placeholder( fd ))
    {
        info->DeviceType = FILE_DEVICE_DISK;
    }
    else  /* regular file or directory */
    {
#if defined(linux) && defined(HAVE_FSTATFS)
        struct statfs stfs;

        /* check for floppy disk */
        if (major(st.st_dev) == FLOPPY_MAJOR)
            info->Characteristics |= FILE_REMOVABLE_MEDIA;

        if (fstatfs( fd, &stfs ) < 0) stfs.f_type = 0;
        switch (stfs.f_type)
        {
        case 0x9660:      /* iso9660 */
        case 0x9fa1:      /* supermount */
        case 0x15013346:  /* udf */
            info->DeviceType = FILE_DEVICE_CD_ROM_FILE_SYSTEM;
            info->Characteristics |= FILE_REMOVABLE_MEDIA|FILE_READ_ONLY_DEVICE;
            break;
        case 0x6969:  /* nfs */
        case 0x517B:  /* smbfs */
        case 0x564c:  /* ncpfs */
            info->DeviceType = FILE_DEVICE_NETWORK_FILE_SYSTEM;
            info->Characteristics |= FILE_REMOTE_DEVICE;
            break;
        case 0x01021994:  /* tmpfs */
        case 0x28cd3d45:  /* cramfs */
        case 0x1373:      /* devfs */
        case 0x9fa0:      /* procfs */
            info->DeviceType = FILE_DEVICE_VIRTUAL_DISK;
            break;
        default:
            info->DeviceType = FILE_DEVICE_DISK_FILE_SYSTEM;
            break;
        }
#elif defined(__FreeBSD__) || defined(__FreeBSD_kernel__) || defined(__APPLE__)
        struct statfs stfs;

        if (fstatfs( fd, &stfs ) < 0)
            info->DeviceType = FILE_DEVICE_DISK_FILE_SYSTEM;
        else
            get_device_info_fstatfs( info, stfs.f_fstypename, stfs.f_flags );
#elif defined(__NetBSD__)
        struct statvfs stfs;

        if (fstatvfs( fd, &stfs) < 0)
            info->DeviceType = FILE_DEVICE_DISK_FILE_SYSTEM;
        else
            get_device_info_fstatfs( info, stfs.f_fstypename, stfs.f_flag );
#elif defined(sun)
        /* Use dkio to work out device types */
        {
# include <sys/dkio.h>
# include <sys/vtoc.h>
            struct dk_cinfo dkinf;
            int retval = ioctl(fd, DKIOCINFO, &dkinf);
            if(retval==-1){
                WARN("Unable to get disk device type information - assuming a disk like device\n");
                info->DeviceType = FILE_DEVICE_DISK_FILE_SYSTEM;
            }
            switch (dkinf.dki_ctype)
            {
            case DKC_CDROM:
                info->DeviceType = FILE_DEVICE_CD_ROM_FILE_SYSTEM;
                info->Characteristics |= FILE_REMOVABLE_MEDIA|FILE_READ_ONLY_DEVICE;
                break;
            case DKC_NCRFLOPPY:
            case DKC_SMSFLOPPY:
            case DKC_INTEL82072:
            case DKC_INTEL82077:
                info->DeviceType = FILE_DEVICE_DISK_FILE_SYSTEM;
                info->Characteristics |= FILE_REMOVABLE_MEDIA;
                break;
            case DKC_MD:
                info->DeviceType = FILE_DEVICE_VIRTUAL_DISK;
                break;
            default:
                info->DeviceType = FILE_DEVICE_DISK_FILE_SYSTEM;
            }
        }
#else
        static int warned;
        if (!warned++) FIXME( "device info not properly supported on this platform\n" );
        info->DeviceType = FILE_DEVICE_DISK_FILE_SYSTEM;
#endif
        info->Characteristics |= FILE_DEVICE_IS_MOUNTED;
    }
    return STATUS_SUCCESS;
}


/******************************************************************************
 *  NtQueryVolumeInformationFile		[NTDLL.@]
 *  ZwQueryVolumeInformationFile		[NTDLL.@]
 *
 * Get volume information for an open file handle.
 *
 * PARAMS
 *  handle      [I] Handle returned from ZwOpenFile() or ZwCreateFile()
 *  io          [O] Receives information about the operation on return
 *  buffer      [O] Destination for volume information
 *  length      [I] Size of FsInformation
 *  info_class  [I] Type of volume information to set
 *
 * RETURNS
 *  Success: 0. io and buffer are updated.
 *  Failure: An NTSTATUS error code describing the error.
 */
NTSTATUS WINAPI NtQueryVolumeInformationFile( HANDLE handle, PIO_STATUS_BLOCK io,
                                              PVOID buffer, ULONG length,
                                              FS_INFORMATION_CLASS info_class )
{
    int fd, needs_close;
    struct stat st;

    if ((io->u.Status = server_get_unix_fd( handle, 0, &fd, &needs_close, NULL, NULL )) != STATUS_SUCCESS)
        return io->u.Status;

    io->u.Status = STATUS_NOT_IMPLEMENTED;
    io->Information = 0;

    switch( info_class )
    {
    case FileFsVolumeInformation:
        FIXME( "%p: volume info not supported\n", handle );
        break;
    case FileFsLabelInformation:
        FIXME( "%p: label info not supported\n", handle );
        break;
    case FileFsSizeInformation:
        if (length < sizeof(FILE_FS_SIZE_INFORMATION))
            io->u.Status = STATUS_BUFFER_TOO_SMALL;
        else
        {
            FILE_FS_SIZE_INFORMATION *info = buffer;

            if (fstat( fd, &st ) < 0)
            {
                io->u.Status = FILE_GetNtStatus();
                break;
            }
            if (!S_ISREG(st.st_mode) && !S_ISDIR(st.st_mode))
            {
                io->u.Status = STATUS_INVALID_DEVICE_REQUEST;
            }
            else
            {
                /* Linux's fstatvfs is buggy */
#if !defined(linux) || !defined(HAVE_FSTATFS)
                struct statvfs stfs;

                if (fstatvfs( fd, &stfs ) < 0)
                {
                    io->u.Status = FILE_GetNtStatus();
                    break;
                }
                info->BytesPerSector = stfs.f_frsize;
#else
                struct statfs stfs;
                if (fstatfs( fd, &stfs ) < 0)
                {
                    io->u.Status = FILE_GetNtStatus();
                    break;
                }
                info->BytesPerSector = stfs.f_bsize;
#endif
                info->TotalAllocationUnits.QuadPart = stfs.f_blocks;
                info->AvailableAllocationUnits.QuadPart = stfs.f_bavail;
                info->SectorsPerAllocationUnit = 1;
                io->Information = sizeof(*info);
                io->u.Status = STATUS_SUCCESS;
            }
        }
        break;
    case FileFsDeviceInformation:
        if (length < sizeof(FILE_FS_DEVICE_INFORMATION))
            io->u.Status = STATUS_BUFFER_TOO_SMALL;
        else
        {
            FILE_FS_DEVICE_INFORMATION *info = buffer;

            if ((io->u.Status = get_device_info( fd, info )) == STATUS_SUCCESS)
                io->Information = sizeof(*info);
        }
        break;
    case FileFsAttributeInformation:
        FIXME( "%p: attribute info not supported\n", handle );
        break;
    case FileFsControlInformation:
        FIXME( "%p: control info not supported\n", handle );
        break;
    case FileFsFullSizeInformation:
        FIXME( "%p: full size info not supported\n", handle );
        break;
    case FileFsObjectIdInformation:
        FIXME( "%p: object id info not supported\n", handle );
        break;
    case FileFsMaximumInformation:
        FIXME( "%p: maximum info not supported\n", handle );
        break;
    default:
        io->u.Status = STATUS_INVALID_PARAMETER;
        break;
    }
    if (needs_close) close( fd );
    return io->u.Status;
}


/******************************************************************
 *		NtFlushBuffersFile  (NTDLL.@)
 *
 * Flush any buffered data on an open file handle.
 *
 * PARAMS
 *  FileHandle         [I] Handle returned from ZwOpenFile() or ZwCreateFile()
 *  IoStatusBlock      [O] Receives information about the operation on return
 *
 * RETURNS
 *  Success: 0. IoStatusBlock is updated.
 *  Failure: An NTSTATUS error code describing the error.
 */
NTSTATUS WINAPI NtFlushBuffersFile( HANDLE hFile, IO_STATUS_BLOCK* IoStatusBlock )
{
    NTSTATUS ret;
    HANDLE hEvent = NULL;

    SERVER_START_REQ( flush_file )
    {
        req->handle = hFile;
        ret = wine_server_call( req );
        hEvent = reply->event;
    }
    SERVER_END_REQ;
    if (!ret && hEvent)
    {
        ret = NtWaitForSingleObject( hEvent, FALSE, NULL );
        NtClose( hEvent );
    }
    return ret;
}

/******************************************************************
 *		NtLockFile       (NTDLL.@)
 *
 *
 */
NTSTATUS WINAPI NtLockFile( HANDLE hFile, HANDLE lock_granted_event,
                            PIO_APC_ROUTINE apc, void* apc_user,
                            PIO_STATUS_BLOCK io_status, PLARGE_INTEGER offset,
                            PLARGE_INTEGER count, ULONG* key, BOOLEAN dont_wait,
                            BOOLEAN exclusive )
{
    NTSTATUS    ret;
    HANDLE      handle;
    BOOLEAN     async;

    if (apc || io_status || key)
    {
        FIXME("Unimplemented yet parameter\n");
        return STATUS_NOT_IMPLEMENTED;
    }

    if (apc_user) FIXME("I/O completion on lock not implemented yet\n");

    for (;;)
    {
        SERVER_START_REQ( lock_file )
        {
            req->handle      = hFile;
            req->offset      = offset->QuadPart;
            req->count       = count->QuadPart;
            req->shared      = !exclusive;
            req->wait        = !dont_wait;
            ret = wine_server_call( req );
            handle = reply->handle;
            async  = reply->overlapped;
        }
        SERVER_END_REQ;
        if (ret != STATUS_PENDING)
        {
            if (!ret && lock_granted_event) NtSetEvent(lock_granted_event, NULL);
            return ret;
        }

        if (async)
        {
            FIXME( "Async I/O lock wait not implemented, might deadlock\n" );
            if (handle) NtClose( handle );
            return STATUS_PENDING;
        }
        if (handle)
        {
            NtWaitForSingleObject( handle, FALSE, NULL );
            NtClose( handle );
        }
        else
        {
            LARGE_INTEGER time;
    
            /* Unix lock conflict, sleep a bit and retry */
            time.QuadPart = 100 * (ULONGLONG)10000;
            time.QuadPart = -time.QuadPart;
            NtDelayExecution( FALSE, &time );
        }
    }
}


/******************************************************************
 *		NtUnlockFile    (NTDLL.@)
 *
 *
 */
NTSTATUS WINAPI NtUnlockFile( HANDLE hFile, PIO_STATUS_BLOCK io_status,
                              PLARGE_INTEGER offset, PLARGE_INTEGER count,
                              PULONG key )
{
    NTSTATUS status;

    TRACE( "%p %x%08x %x%08x\n",
           hFile, offset->u.HighPart, offset->u.LowPart, count->u.HighPart, count->u.LowPart );

    if (io_status || key)
    {
        FIXME("Unimplemented yet parameter\n");
        return STATUS_NOT_IMPLEMENTED;
    }

    SERVER_START_REQ( unlock_file )
    {
        req->handle = hFile;
        req->offset = offset->QuadPart;
        req->count  = count->QuadPart;
        status = wine_server_call( req );
    }
    SERVER_END_REQ;
    return status;
}

/******************************************************************
 *		NtCreateNamedPipeFile    (NTDLL.@)
 *
 *
 */
NTSTATUS WINAPI NtCreateNamedPipeFile( PHANDLE handle, ULONG access,
                                       POBJECT_ATTRIBUTES attr, PIO_STATUS_BLOCK iosb,
                                       ULONG sharing, ULONG dispo, ULONG options,
                                       ULONG pipe_type, ULONG read_mode, 
                                       ULONG completion_mode, ULONG max_inst,
                                       ULONG inbound_quota, ULONG outbound_quota,
                                       PLARGE_INTEGER timeout)
{
    NTSTATUS    status;

    TRACE("(%p %x %s %p %x %d %x %d %d %d %d %d %d %p)\n",
          handle, access, debugstr_w(attr->ObjectName->Buffer), iosb, sharing, dispo,
          options, pipe_type, read_mode, completion_mode, max_inst, inbound_quota,
          outbound_quota, timeout);

    /* assume we only get relative timeout */
    if (timeout->QuadPart > 0)
        FIXME("Wrong time %s\n", wine_dbgstr_longlong(timeout->QuadPart));

    SERVER_START_REQ( create_named_pipe )
    {
        req->access  = access;
        req->attributes = attr->Attributes;
        req->rootdir = attr->RootDirectory;
        req->options = options;
        req->flags = 
            (pipe_type) ? NAMED_PIPE_MESSAGE_STREAM_WRITE : 0 |
            (read_mode) ? NAMED_PIPE_MESSAGE_STREAM_READ  : 0 |
            (completion_mode) ? NAMED_PIPE_NONBLOCKING_MODE  : 0;
        req->maxinstances = max_inst;
        req->outsize = outbound_quota;
        req->insize  = inbound_quota;
        req->timeout = timeout->QuadPart;
        wine_server_add_data( req, attr->ObjectName->Buffer,
                              attr->ObjectName->Length );
        status = wine_server_call( req );
        if (!status) *handle = reply->handle;
    }
    SERVER_END_REQ;
    return status;
}

/******************************************************************
 *		NtDeleteFile    (NTDLL.@)
 *
 *
 */
NTSTATUS WINAPI NtDeleteFile( POBJECT_ATTRIBUTES ObjectAttributes )
{
    NTSTATUS status;
    HANDLE hFile;
    IO_STATUS_BLOCK io;

    TRACE("%p\n", ObjectAttributes);
    status = NtCreateFile( &hFile, GENERIC_READ | GENERIC_WRITE | DELETE,
                           ObjectAttributes, &io, NULL, 0,
                           FILE_SHARE_READ | FILE_SHARE_WRITE | FILE_SHARE_DELETE, 
                           FILE_OPEN, FILE_DELETE_ON_CLOSE, NULL, 0 );
    if (status == STATUS_SUCCESS) status = NtClose(hFile);
    return status;
}

/******************************************************************
 *		NtCancelIoFile    (NTDLL.@)
 *
 *
 */
NTSTATUS WINAPI NtCancelIoFile( HANDLE hFile, PIO_STATUS_BLOCK io_status )
{
    LARGE_INTEGER timeout;

    TRACE("%p %p\n", hFile, io_status );

    SERVER_START_REQ( cancel_async )
    {
        req->handle = hFile;
        wine_server_call( req );
    }
    SERVER_END_REQ;
    /* Let some APC be run, so that we can run the remaining APCs on hFile
     * either the cancelation of the pending one, but also the execution
     * of the queued APC, but not yet run. This is needed to ensure proper
     * clean-up of allocated data.
     */
    timeout.u.LowPart = timeout.u.HighPart = 0;
    return io_status->u.Status = NtDelayExecution( TRUE, &timeout );
}

/******************************************************************************
 *  NtCreateMailslotFile	[NTDLL.@]
 *  ZwCreateMailslotFile	[NTDLL.@]
 *
 * PARAMS
 *  pHandle          [O] pointer to receive the handle created
 *  DesiredAccess    [I] access mode (read, write, etc)
 *  ObjectAttributes [I] fully qualified NT path of the mailslot
 *  IoStatusBlock    [O] receives completion status and other info
 *  CreateOptions    [I]
 *  MailslotQuota    [I]
 *  MaxMessageSize   [I]
 *  TimeOut          [I]
 *
 * RETURNS
 *  An NT status code
 */
NTSTATUS WINAPI NtCreateMailslotFile(PHANDLE pHandle, ULONG DesiredAccess,
     POBJECT_ATTRIBUTES attr, PIO_STATUS_BLOCK IoStatusBlock,
     ULONG CreateOptions, ULONG MailslotQuota, ULONG MaxMessageSize,
     PLARGE_INTEGER TimeOut)
{
    LARGE_INTEGER timeout;
    NTSTATUS ret;

    TRACE("%p %08x %p %p %08x %08x %08x %p\n",
              pHandle, DesiredAccess, attr, IoStatusBlock,
              CreateOptions, MailslotQuota, MaxMessageSize, TimeOut);

    if (!pHandle) return STATUS_ACCESS_VIOLATION;
    if (!attr) return STATUS_INVALID_PARAMETER;
    if (!attr->ObjectName) return STATUS_OBJECT_PATH_SYNTAX_BAD;

    /*
     *  For a NULL TimeOut pointer set the default timeout value
     */
    if  (!TimeOut)
        timeout.QuadPart = -1;
    else
        timeout.QuadPart = TimeOut->QuadPart;

    SERVER_START_REQ( create_mailslot )
    {
        req->access = DesiredAccess;
        req->attributes = attr->Attributes;
        req->rootdir = attr->RootDirectory;
        req->max_msgsize = MaxMessageSize;
        req->read_timeout = timeout.QuadPart;
        wine_server_add_data( req, attr->ObjectName->Buffer,
                              attr->ObjectName->Length );
        ret = wine_server_call( req );
        if( ret == STATUS_SUCCESS )
            *pHandle = reply->handle;
    }
    SERVER_END_REQ;
 
    return ret;
}
