disk.c

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/* -*- c-basic-offset: 8 -*-
   rdesktop: A Remote Desktop Protocol client.
   Disk Redirection
   Copyright (C) Jeroen Meijer 2003

   This program is free software; you can redistribute it and/or modify
   it under the terms of the GNU General Public License as published by
   the Free Software Foundation; either version 2 of the License, or
   (at your option) any later version.

   This program 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 General Public License for more details.

   You should have received a copy of the GNU General Public License along
   with this program; if not, write to the Free Software Foundation, Inc.,
   51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*/

#include "disk.h"

#include <sys/types.h>
#include <sys/stat.h>
#include <unistd.h>
#include <fcntl.h>      /* open, close */
#include <dirent.h>     /* opendir, closedir, readdir */
#include <fnmatch.h>
#include <errno.h>      /* errno */
#include <stdio.h>

#include <utime.h>
#include <time.h>       /* ctime */

#if (defined(HAVE_DIRFD) || (HAVE_DECL_DIRFD == 1))
#define DIRFD(a) (dirfd(a))
#else
#define DIRFD(a) ((a)->DIR_FD_MEMBER_NAME)
#endif

/* TODO: Fix mntent-handling for solaris
 * #include <sys/mntent.h> */
#if (defined(HAVE_MNTENT_H) && defined(HAVE_SETMNTENT))
#include <mntent.h>
#define MNTENT_PATH "/etc/mtab"
#define USE_SETMNTENT
#endif

#ifdef HAVE_SYS_VFS_H
#include <sys/vfs.h>
#endif

#ifdef HAVE_SYS_STATVFS_H
#include <sys/statvfs.h>
#endif

#ifdef HAVE_SYS_STATFS_H
#include <sys/statfs.h>
#endif

#ifdef HAVE_SYS_PARAM_H
#include <sys/param.h>
#endif

#ifdef HAVE_SYS_MOUNT_H
#include <sys/mount.h>
#endif

#include "rdesktop.h"

#ifdef STAT_STATFS3_OSF1
#define STATFS_FN(path, buf) (statfs(path,buf,sizeof(buf)))
#define STATFS_T statfs
#define USE_STATFS
#endif

#ifdef STAT_STATVFS
#define STATFS_FN(path, buf) (statvfs(path,buf))
#define STATFS_T statvfs
#define USE_STATVFS
#endif

#ifdef STAT_STATVFS64
#define STATFS_FN(path, buf) (statvfs64(path,buf))
#define STATFS_T statvfs64
#define USE_STATVFS
#endif

#if (defined(STAT_STATFS2_FS_DATA) || defined(STAT_STATFS2_BSIZE) || defined(STAT_STATFS2_FSIZE))
#define STATFS_FN(path, buf) (statfs(path,buf))
#define STATFS_T statfs
#define USE_STATFS
#endif

#ifdef STAT_STATFS4
#define STATFS_FN(path, buf) (statfs(path,buf,sizeof(buf),0))
#define STATFS_T statfs
#define USE_STATFS
#endif

#if ((defined(USE_STATFS) && defined(HAVE_STRUCT_STATFS_F_NAMEMAX)) || (defined(USE_STATVFS) && defined(HAVE_STRUCT_STATVFS_F_NAMEMAX)))
#define F_NAMELEN(buf) ((buf).f_namemax)
#endif

#if ((defined(USE_STATFS) && defined(HAVE_STRUCT_STATFS_F_NAMELEN)) || (defined(USE_STATVFS) && defined(HAVE_STRUCT_STATVFS_F_NAMELEN)))
#define F_NAMELEN(buf) ((buf).f_namelen)
#endif

#ifndef F_NAMELEN
#define F_NAMELEN(buf) (255)
#endif

/* Dummy statfs fallback */
#ifndef STATFS_T
struct dummy_statfs_t
{
    long f_bfree;
    long f_bsize;
    long f_blocks;
    int f_namelen;
    int f_namemax;
};

static int
dummy_statfs(struct dummy_statfs_t *buf)
{
    buf->f_blocks = 262144;
    buf->f_bfree = 131072;
    buf->f_bsize = 512;
    buf->f_namelen = 255;
    buf->f_namemax = 255;

    return 0;
}

#define STATFS_T dummy_statfs_t
#define STATFS_FN(path,buf) (dummy_statfs(buf))
#endif

typedef struct
{
    char name[PATH_MAX];
    char label[PATH_MAX];
    unsigned long serial;
    char type[PATH_MAX];
} FsInfoType;

static NTSTATUS NotifyInfo(RDPCLIENT * This, NTHANDLE handle, uint32 info_class, NOTIFY * p);

static time_t
get_create_time(struct stat *st)
{
    time_t ret, ret1;

    ret = MIN(st->st_ctime, st->st_mtime);
    ret1 = MIN(ret, st->st_atime);

    if (ret1 != (time_t) 0)
        return ret1;

    return ret;
}

/* Convert seconds since 1970 to a filetime */
static void
seconds_since_1970_to_filetime(time_t seconds, uint32 * high, uint32 * low)
{
    unsigned long long ticks;

    ticks = (seconds + 11644473600LL) * 10000000;
    *low = (uint32) ticks;
    *high = (uint32) (ticks >> 32);
}

/* Convert seconds since 1970 back to filetime */
static time_t
convert_1970_to_filetime(uint32 high, uint32 low)
{
    unsigned long long ticks;
    time_t val;

    ticks = low + (((unsigned long long) high) << 32);
    ticks /= 10000000;
    ticks -= 11644473600LL;

    val = (time_t) ticks;
    return (val);

}

/* A wrapper for ftruncate which supports growing files, even if the
   native ftruncate doesn't. This is needed on Linux FAT filesystems,
   for example. */
static int
ftruncate_growable(int fd, off_t length)
{
    int ret;
    off_t pos;
    static const char zero = 0;

    /* Try the simple method first */
    if ((ret = ftruncate(fd, length)) != -1)
    {
        return ret;
    }

    /*
     * Some kind of error. Perhaps we were trying to grow. Retry
     * in a safe way.
     */

    /* Get current position */
    if ((pos = lseek(fd, 0, SEEK_CUR)) == -1)
    {
        perror("lseek");
        return -1;
    }

    /* Seek to new size */
    if (lseek(fd, length, SEEK_SET) == -1)
    {
        perror("lseek");
        return -1;
    }

    /* Write a zero */
    if (write(fd, &zero, 1) == -1)
    {
        perror("write");
        return -1;
    }

    /* Truncate. This shouldn't fail. */
    if (ftruncate(fd, length) == -1)
    {
        perror("ftruncate");
        return -1;
    }

    /* Restore position */
    if (lseek(fd, pos, SEEK_SET) == -1)
    {
        perror("lseek");
        return -1;
    }

    return 0;
}

/* Just like open(2), but if a open with O_EXCL fails, retry with
   GUARDED semantics. This might be necessary because some filesystems
   (such as NFS filesystems mounted from a unfsd server) doesn't
   support O_EXCL. GUARDED semantics are subject to race conditions,
   but we can live with that.
*/
static int
open_weak_exclusive(const char *pathname, int flags, mode_t mode)
{
    int ret;
    struct stat statbuf;

    ret = open(pathname, flags, mode);
    if (ret != -1 || !(flags & O_EXCL))
    {
        /* Success, or not using O_EXCL */
        return ret;
    }

    /* An error occured, and we are using O_EXCL. In case the FS
       doesn't support O_EXCL, some kind of error will be
       returned. Unfortunately, we don't know which one. Linux
       2.6.8 seems to return 524, but I cannot find a documented
       #define for this case. So, we'll return only on errors that
       we know aren't related to O_EXCL. */
    switch (errno)
    {
        case EACCES:
        case EEXIST:
        case EINTR:
        case EISDIR:
        case ELOOP:
        case ENAMETOOLONG:
        case ENOENT:
        case ENOTDIR:
            return ret;
    }

    /* Retry with GUARDED semantics */
    if (stat(pathname, &statbuf) != -1)
    {
        /* File exists */
        errno = EEXIST;
        return -1;
    }
    else
    {
        return open(pathname, flags & ~O_EXCL, mode);
    }
}

/* Enumeration of devices from rdesktop.c        */
/* returns numer of units found and initialized. */
/* optarg looks like ':h=/mnt/floppy,b=/mnt/usbdevice1' */
/* when it arrives to this function.             */
int
disk_enum_devices(RDPCLIENT * This, uint32 * id, char *optarg)
{
    char *pos = optarg;
    char *pos2;
    int count = 0;

    /* skip the first colon */
    optarg++;
    while ((pos = next_arg(optarg, ',')) && *id < RDPDR_MAX_DEVICES)
    {
        pos2 = next_arg(optarg, '=');

        strncpy(This->rdpdr_device[*id].name, optarg, sizeof(This->rdpdr_device[*id].name) - 1);
        if (strlen(optarg) > (sizeof(This->rdpdr_device[*id].name) - 1))
            fprintf(stderr, "share name %s truncated to %s\n", optarg,
                This->rdpdr_device[*id].name);

        This->rdpdr_device[*id].local_path = (char *) xmalloc(strlen(pos2) + 1);
        strcpy(This->rdpdr_device[*id].local_path, pos2);
        This->rdpdr_device[*id].device_type = DEVICE_TYPE_DISK;
        count++;
        (*id)++;

        optarg = pos;
    }
    return count;
}

/* Opens or creates a file or directory */
static NTSTATUS
disk_create(RDPCLIENT * This, uint32 device_id, uint32 accessmask, uint32 sharemode, uint32 create_disposition,
        uint32 flags_and_attributes, char *filename, NTHANDLE * phandle)
{
    NTHANDLE handle;
    DIR *dirp;
    int flags, mode;
    char path[PATH_MAX];
    struct stat filestat;

    handle = 0;
    dirp = NULL;
    flags = 0;
    mode = S_IRWXU | S_IRGRP | S_IXGRP | S_IROTH | S_IXOTH;

    if (*filename && filename[strlen(filename) - 1] == '/')
        filename[strlen(filename) - 1] = 0;
    sprintf(path, "%s%s", This->rdpdr_device[device_id].local_path, filename);

    switch (create_disposition)
    {
        case CREATE_ALWAYS:

            /* Delete existing file/link. */
            unlink(path);
            flags |= O_CREAT;
            break;

        case CREATE_NEW:

            /* If the file already exists, then fail. */
            flags |= O_CREAT | O_EXCL;
            break;

        case OPEN_ALWAYS:

            /* Create if not already exists. */
            flags |= O_CREAT;
            break;

        case OPEN_EXISTING:

            /* Default behaviour */
            break;

        case TRUNCATE_EXISTING:

            /* If the file does not exist, then fail. */
            flags |= O_TRUNC;
            break;
    }

    /*printf("Open: \"%s\"  flags: %X, accessmask: %X sharemode: %X create disp: %X\n", path, flags_and_attributes, accessmask, sharemode, create_disposition); */

    /* Get information about file and set that flag ourselfs */
    if ((stat(path, &filestat) == 0) && (S_ISDIR(filestat.st_mode)))
    {
        if (flags_and_attributes & FILE_NON_DIRECTORY_FILE)
            return STATUS_FILE_IS_A_DIRECTORY;
        else
            flags_and_attributes |= FILE_DIRECTORY_FILE;
    }

    if (flags_and_attributes & FILE_DIRECTORY_FILE)
    {
        if (flags & O_CREAT)
        {
            mkdir(path, mode);
        }

        dirp = opendir(path);
        if (!dirp)
        {
            switch (errno)
            {
                case EACCES:

                    return STATUS_ACCESS_DENIED;

                case ENOENT:

                    return STATUS_NO_SUCH_FILE;

                default:

                    perror("opendir");
                    return STATUS_NO_SUCH_FILE;
            }
        }
        handle = DIRFD(dirp);
    }
    else
    {

        if (accessmask & GENERIC_ALL
            || (accessmask & GENERIC_READ && accessmask & GENERIC_WRITE))
        {
            flags |= O_RDWR;
        }
        else if ((accessmask & GENERIC_WRITE) && !(accessmask & GENERIC_READ))
        {
            flags |= O_WRONLY;
        }
        else
        {
            flags |= O_RDONLY;
        }

        handle = open_weak_exclusive(path, flags, mode);
        if (handle == -1)
        {
            switch (errno)
            {
                case EISDIR:

                    return STATUS_FILE_IS_A_DIRECTORY;

                case EACCES:

                    return STATUS_ACCESS_DENIED;

                case ENOENT:

                    return STATUS_NO_SUCH_FILE;
                case EEXIST:

                    return STATUS_OBJECT_NAME_COLLISION;
                default:

                    perror("open");
                    return STATUS_NO_SUCH_FILE;
            }
        }

        /* all read and writes of files should be non blocking */
        if (fcntl(handle, F_SETFL, O_NONBLOCK) == -1)
            perror("fcntl");
    }

    if (handle >= MAX_OPEN_FILES)
    {
        error("Maximum number of open files (%s) reached. Increase MAX_OPEN_FILES!\n",
              handle);
        exit(1);
    }

    if (dirp)
        This->fileinfo[handle].pdir = dirp;
    else
        This->fileinfo[handle].pdir = NULL;

    This->fileinfo[handle].device_id = device_id;
    This->fileinfo[handle].flags_and_attributes = flags_and_attributes;
    This->fileinfo[handle].accessmask = accessmask;
    strncpy(This->fileinfo[handle].path, path, PATH_MAX - 1);
    This->fileinfo[handle].delete_on_close = False;
    This->notify_stamp = True;

    *phandle = handle;
    return STATUS_SUCCESS;
}

static NTSTATUS
disk_close(RDPCLIENT * This, NTHANDLE handle)
{
    struct fileinfo *pfinfo;

    pfinfo = &(This->fileinfo[handle]);

    This->notify_stamp = True;

    rdpdr_abort_io(This, handle, 0, STATUS_CANCELLED);

    if (pfinfo->pdir)
    {
        if (closedir(pfinfo->pdir) < 0)
        {
            perror("closedir");
            return STATUS_INVALID_HANDLE;
        }

        if (pfinfo->delete_on_close)
            if (rmdir(pfinfo->path) < 0)
            {
                perror(pfinfo->path);
                return STATUS_ACCESS_DENIED;
            }
        pfinfo->delete_on_close = False;
    }
    else
    {
        if (close(handle) < 0)
        {
            perror("close");
            return STATUS_INVALID_HANDLE;
        }
        if (pfinfo->delete_on_close)
            if (unlink(pfinfo->path) < 0)
            {
                perror(pfinfo->path);
                return STATUS_ACCESS_DENIED;
            }

        pfinfo->delete_on_close = False;
    }

    return STATUS_SUCCESS;
}

static NTSTATUS
disk_read(RDPCLIENT * This, NTHANDLE handle, uint8 * data, uint32 length, uint32 offset, uint32 * result)
{
    int n;

#if 0
    /* browsing dir ????        */
    /* each request is 24 bytes */
    if (This->fileinfo[handle].flags_and_attributes & FILE_DIRECTORY_FILE)
    {
        *result = 0;
        return STATUS_SUCCESS;
    }
#endif

    lseek(handle, offset, SEEK_SET);

    n = read(handle, data, length);

    if (n < 0)
    {
        *result = 0;
        switch (errno)
        {
            case EISDIR:
                /* Implement 24 Byte directory read ??
                   with STATUS_NOT_IMPLEMENTED server doesn't read again */
                /* return STATUS_FILE_IS_A_DIRECTORY; */
                return STATUS_NOT_IMPLEMENTED;
            default:
                perror("read");
                return STATUS_INVALID_PARAMETER;
        }
    }

    *result = n;

    return STATUS_SUCCESS;
}

static NTSTATUS
disk_write(RDPCLIENT * This, NTHANDLE handle, uint8 * data, uint32 length, uint32 offset, uint32 * result)
{
    int n;

    lseek(handle, offset, SEEK_SET);

    n = write(handle, data, length);

    if (n < 0)
    {
        perror("write");
        *result = 0;
        switch (errno)
        {
            case ENOSPC:
                return STATUS_DISK_FULL;
            default:
                return STATUS_ACCESS_DENIED;
        }
    }

    *result = n;

    return STATUS_SUCCESS;
}

NTSTATUS
disk_query_information(RDPCLIENT * This, NTHANDLE handle, uint32 info_class, STREAM out)
{
    uint32 file_attributes, ft_high, ft_low;
    struct stat filestat;
    char *path, *filename;

    path = This->fileinfo[handle].path;

    /* Get information about file */
    if (fstat(handle, &filestat) != 0)
    {
        perror("stat");
        out_uint8(out, 0);
        return STATUS_ACCESS_DENIED;
    }

    /* Set file attributes */
    file_attributes = 0;
    if (S_ISDIR(filestat.st_mode))
        file_attributes |= FILE_ATTRIBUTE_DIRECTORY;

    filename = 1 + strrchr(path, '/');
    if (filename && filename[0] == '.')
        file_attributes |= FILE_ATTRIBUTE_HIDDEN;

    if (!file_attributes)
        file_attributes |= FILE_ATTRIBUTE_NORMAL;

    if (!(filestat.st_mode & S_IWUSR))
        file_attributes |= FILE_ATTRIBUTE_READONLY;

    /* Return requested data */
    switch (info_class)
    {
        case FileBasicInformation:
            seconds_since_1970_to_filetime(get_create_time(&filestat), &ft_high,
                               &ft_low);
            out_uint32_le(out, ft_low); /* create_access_time */
            out_uint32_le(out, ft_high);

            seconds_since_1970_to_filetime(filestat.st_atime, &ft_high, &ft_low);
            out_uint32_le(out, ft_low); /* last_access_time */
            out_uint32_le(out, ft_high);

            seconds_since_1970_to_filetime(filestat.st_mtime, &ft_high, &ft_low);
            out_uint32_le(out, ft_low); /* last_write_time */
            out_uint32_le(out, ft_high);

            seconds_since_1970_to_filetime(filestat.st_ctime, &ft_high, &ft_low);
            out_uint32_le(out, ft_low); /* last_change_time */
            out_uint32_le(out, ft_high);

            out_uint32_le(out, file_attributes);
            break;

        case FileStandardInformation:

            out_uint32_le(out, filestat.st_size);   /* Allocation size */
            out_uint32_le(out, 0);
            out_uint32_le(out, filestat.st_size);   /* End of file */
            out_uint32_le(out, 0);
            out_uint32_le(out, filestat.st_nlink);  /* Number of links */
            out_uint8(out, 0);  /* Delete pending */
            out_uint8(out, S_ISDIR(filestat.st_mode) ? 1 : 0);  /* Directory */
            break;

        case FileObjectIdInformation:

            out_uint32_le(out, file_attributes);    /* File Attributes */
            out_uint32_le(out, 0);  /* Reparse Tag */
            break;

        default:

            unimpl("IRP Query (File) Information class: 0x%x\n", info_class);
            return STATUS_INVALID_PARAMETER;
    }
    return STATUS_SUCCESS;
}

NTSTATUS
disk_set_information(RDPCLIENT * This, NTHANDLE handle, uint32 info_class, STREAM in, STREAM out)
{
    uint32 length, file_attributes, ft_high, ft_low, delete_on_close;
    char newname[PATH_MAX], fullpath[PATH_MAX];
    struct fileinfo *pfinfo;
    int mode;
    struct stat filestat;
    time_t write_time, change_time, access_time, mod_time;
    struct utimbuf tvs;
    struct STATFS_T stat_fs;

    pfinfo = &(This->fileinfo[handle]);
    This->notify_stamp = True;

    switch (info_class)
    {
        case FileBasicInformation:
            write_time = change_time = access_time = 0;

            in_uint8s(in, 4);   /* Handle of root dir? */
            in_uint8s(in, 24);  /* unknown */

            /* CreationTime */
            in_uint32_le(in, ft_low);
            in_uint32_le(in, ft_high);

            /* AccessTime */
            in_uint32_le(in, ft_low);
            in_uint32_le(in, ft_high);
            if (ft_low || ft_high)
                access_time = convert_1970_to_filetime(ft_high, ft_low);

            /* WriteTime */
            in_uint32_le(in, ft_low);
            in_uint32_le(in, ft_high);
            if (ft_low || ft_high)
                write_time = convert_1970_to_filetime(ft_high, ft_low);

            /* ChangeTime */
            in_uint32_le(in, ft_low);
            in_uint32_le(in, ft_high);
            if (ft_low || ft_high)
                change_time = convert_1970_to_filetime(ft_high, ft_low);

            in_uint32_le(in, file_attributes);

            if (fstat(handle, &filestat))
                return STATUS_ACCESS_DENIED;

            tvs.modtime = filestat.st_mtime;
            tvs.actime = filestat.st_atime;
            if (access_time)
                tvs.actime = access_time;


            if (write_time || change_time)
                mod_time = MIN(write_time, change_time);
            else
                mod_time = write_time ? write_time : change_time;

            if (mod_time)
                tvs.modtime = mod_time;


            if (access_time || write_time || change_time)
            {
#if WITH_DEBUG_RDP5
                printf("FileBasicInformation access       time %s",
                       ctime(&tvs.actime));
                printf("FileBasicInformation modification time %s",
                       ctime(&tvs.modtime));
#endif
                if (utime(pfinfo->path, &tvs) && errno != EPERM)
                    return STATUS_ACCESS_DENIED;
            }

            if (!file_attributes)
                break;  /* not valid */

            mode = filestat.st_mode;

            if (file_attributes & FILE_ATTRIBUTE_READONLY)
                mode &= ~(S_IWUSR | S_IWGRP | S_IWOTH);
            else
                mode |= S_IWUSR;

            mode &= 0777;
#if WITH_DEBUG_RDP5
            printf("FileBasicInformation set access mode 0%o", mode);
#endif

            if (fchmod(handle, mode))
                return STATUS_ACCESS_DENIED;

            break;

        case FileRenameInformation:

            in_uint8s(in, 4);   /* Handle of root dir? */
            in_uint8s(in, 0x1a);    /* unknown */
            in_uint32_le(in, length);

            if (length && (length / 2) < 256)
            {
                rdp_in_unistr(This, in, newname, length);
                convert_to_unix_filename(newname);
            }
            else
            {
                return STATUS_INVALID_PARAMETER;
            }

            sprintf(fullpath, "%s%s", This->rdpdr_device[pfinfo->device_id].local_path,
                newname);

            if (rename(pfinfo->path, fullpath) != 0)
            {
                perror("rename");
                return STATUS_ACCESS_DENIED;
            }
            break;

        case FileDispositionInformation:
            /* As far as I understand it, the correct
               thing to do here is to *schedule* a delete,
               so it will be deleted when the file is
               closed. Subsequent
               FileDispositionInformation requests with
               DeleteFile set to FALSE should unschedule
               the delete. See
               http://www.osronline.com/article.cfm?article=245. */

            in_uint32_le(in, delete_on_close);

            if (delete_on_close ||
                (pfinfo->
                 accessmask & (FILE_DELETE_ON_CLOSE | FILE_COMPLETE_IF_OPLOCKED)))
            {
                pfinfo->delete_on_close = True;
            }

            break;

        case FileAllocationInformation:
            /* Fall through to FileEndOfFileInformation,
               which uses ftrunc. This is like Samba with
               "strict allocation = false", and means that
               we won't detect out-of-quota errors, for
               example. */

        case FileEndOfFileInformation:
            in_uint8s(in, 28);  /* unknown */
            in_uint32_le(in, length);   /* file size */

            /* prevents start of writing if not enough space left on device */
            if (STATFS_FN(This->rdpdr_device[pfinfo->device_id].local_path, &stat_fs) == 0)
                if (stat_fs.f_bfree * stat_fs.f_bsize < length)
                    return STATUS_DISK_FULL;

            if (ftruncate_growable(handle, length) != 0)
            {
                return STATUS_DISK_FULL;
            }

            break;
        default:

            unimpl("IRP Set File Information class: 0x%x\n", info_class);
            return STATUS_INVALID_PARAMETER;
    }
    return STATUS_SUCCESS;
}

NTSTATUS
disk_check_notify(RDPCLIENT * This, NTHANDLE handle)
{
    struct fileinfo *pfinfo;
    NTSTATUS status = STATUS_PENDING;

    NOTIFY notify;

    pfinfo = &(This->fileinfo[handle]);
    if (!pfinfo->pdir)
        return STATUS_INVALID_DEVICE_REQUEST;



    status = NotifyInfo(This, handle, pfinfo->info_class, &notify);

    if (status != STATUS_PENDING)
        return status;

    if (memcmp(&pfinfo->notify, &notify, sizeof(NOTIFY)))
    {
        /*printf("disk_check_notify found changed event\n"); */
        memcpy(&pfinfo->notify, &notify, sizeof(NOTIFY));
        status = STATUS_NOTIFY_ENUM_DIR;
    }

    return status;


}

NTSTATUS
disk_create_notify(RDPCLIENT * This, NTHANDLE handle, uint32 info_class)
{

    struct fileinfo *pfinfo;
    NTSTATUS ret = STATUS_PENDING;

    /* printf("start disk_create_notify info_class %X\n", info_class); */

    pfinfo = &(This->fileinfo[handle]);
    pfinfo->info_class = info_class;

    ret = NotifyInfo(This, handle, info_class, &pfinfo->notify);

    if (info_class & 0x1000)
    {           /* ???? */
        if (ret == STATUS_PENDING)
            return STATUS_SUCCESS;
    }

    /* printf("disk_create_notify: num_entries %d\n", pfinfo->notify.num_entries); */


    return ret;

}

static NTSTATUS
NotifyInfo(RDPCLIENT * This, NTHANDLE handle, uint32 info_class, NOTIFY * p)
{
    struct fileinfo *pfinfo;
    struct stat buf;
    struct dirent *dp;
    char *fullname;
    DIR *dpr;

    pfinfo = &(This->fileinfo[handle]);
    if (fstat(handle, &buf) < 0)
    {
        perror("NotifyInfo");
        return STATUS_ACCESS_DENIED;
    }
    p->modify_time = buf.st_mtime;
    p->status_time = buf.st_ctime;
    p->num_entries = 0;
    p->total_time = 0;


    dpr = opendir(pfinfo->path);
    if (!dpr)
    {
        perror("NotifyInfo");
        return STATUS_ACCESS_DENIED;
    }


    while ((dp = readdir(dpr)))
    {
        if (!strcmp(dp->d_name, ".") || !strcmp(dp->d_name, ".."))
            continue;
        p->num_entries++;
        fullname = (char *) xmalloc(strlen(pfinfo->path) + strlen(dp->d_name) + 2);
        sprintf(fullname, "%s/%s", pfinfo->path, dp->d_name);

        if (!stat(fullname, &buf))
        {
            p->total_time += (buf.st_mtime + buf.st_ctime);
        }

        xfree(fullname);
    }
    closedir(dpr);

    return STATUS_PENDING;
}

static FsInfoType *
FsVolumeInfo(char *fpath)
{

    static FsInfoType info;
#ifdef USE_SETMNTENT
    FILE *fdfs;
    struct mntent *e;
#endif

    /* initialize */
    memset(&info, 0, sizeof(info));
    strcpy(info.label, "RDESKTOP");
    strcpy(info.type, "RDPFS");

#ifdef USE_SETMNTENT
    fdfs = setmntent(MNTENT_PATH, "r");
    if (!fdfs)
        return &info;

    while ((e = getmntent(fdfs)))
    {
        if (str_startswith(e->mnt_dir, fpath))
        {
            strcpy(info.type, e->mnt_type);
            strcpy(info.name, e->mnt_fsname);
            if (strstr(e->mnt_opts, "vfat") || strstr(e->mnt_opts, "iso9660"))
            {
                int fd = open(e->mnt_fsname, O_RDONLY);
                if (fd >= 0)
                {
                    unsigned char buf[512];
                    memset(buf, 0, sizeof(buf));
                    if (strstr(e->mnt_opts, "vfat"))
                         /*FAT*/
                    {
                        strcpy(info.type, "vfat");
                        read(fd, buf, sizeof(buf));
                        info.serial =
                            (buf[42] << 24) + (buf[41] << 16) +
                            (buf[40] << 8) + buf[39];
                        strncpy(info.label, buf + 43, 10);
                        info.label[10] = '\0';
                    }
                    else if (lseek(fd, 32767, SEEK_SET) >= 0)   /* ISO9660 */
                    {
                        read(fd, buf, sizeof(buf));
                        strncpy(info.label, buf + 41, 32);
                        info.label[32] = '\0';
                        /* info.Serial = (buf[128]<<24)+(buf[127]<<16)+(buf[126]<<8)+buf[125]; */
                    }
                    close(fd);
                }
            }
        }
    }
    endmntent(fdfs);
#else
    /* initialize */
    memset(&info, 0, sizeof(info));
    strcpy(info.label, "RDESKTOP");
    strcpy(info.type, "RDPFS");

#endif
    return &info;
}


NTSTATUS
disk_query_volume_information(RDPCLIENT * This, NTHANDLE handle, uint32 info_class, STREAM out)
{
    struct STATFS_T stat_fs;
    struct fileinfo *pfinfo;
    FsInfoType *fsinfo;

    pfinfo = &(This->fileinfo[handle]);

    if (STATFS_FN(pfinfo->path, &stat_fs) != 0)
    {
        perror("statfs");
        return STATUS_ACCESS_DENIED;
    }

    fsinfo = FsVolumeInfo(pfinfo->path);

    switch (info_class)
    {
        case FileFsVolumeInformation:

            out_uint32_le(out, 0);  /* volume creation time low */
            out_uint32_le(out, 0);  /* volume creation time high */
            out_uint32_le(out, fsinfo->serial); /* serial */

            out_uint32_le(out, 2 * strlen(fsinfo->label));  /* length of string */

            out_uint8(out, 0);  /* support objects? */
            rdp_out_unistr(This, out, fsinfo->label, 2 * strlen(fsinfo->label) - 2);
            break;

        case FileFsSizeInformation:

            out_uint32_le(out, stat_fs.f_blocks);   /* Total allocation units low */
            out_uint32_le(out, 0);  /* Total allocation high units */
            out_uint32_le(out, stat_fs.f_bfree);    /* Available allocation units */
            out_uint32_le(out, 0);  /* Available allowcation units */
            out_uint32_le(out, stat_fs.f_bsize / 0x200);    /* Sectors per allocation unit */
            out_uint32_le(out, 0x200);  /* Bytes per sector */
            break;

        case FileFsAttributeInformation:

            out_uint32_le(out, FS_CASE_SENSITIVE | FS_CASE_IS_PRESERVED);   /* fs attributes */
            out_uint32_le(out, F_NAMELEN(stat_fs)); /* max length of filename */

            out_uint32_le(out, 2 * strlen(fsinfo->type));   /* length of fs_type */
            rdp_out_unistr(This, out, fsinfo->type, 2 * strlen(fsinfo->type) - 2);
            break;

        case FileFsLabelInformation:
        case FileFsDeviceInformation:
        case FileFsControlInformation:
        case FileFsFullSizeInformation:
        case FileFsObjectIdInformation:
        case FileFsMaximumInformation:

        default:

            unimpl("IRP Query Volume Information class: 0x%x\n", info_class);
            return STATUS_INVALID_PARAMETER;
    }
    return STATUS_SUCCESS;
}

NTSTATUS
disk_query_directory(RDPCLIENT * This, NTHANDLE handle, uint32 info_class, char *pattern, STREAM out)
{
    uint32 file_attributes, ft_low, ft_high;
    char *dirname, fullpath[PATH_MAX];
    DIR *pdir;
    struct dirent *pdirent;
    struct stat fstat;
    struct fileinfo *pfinfo;

    pfinfo = &(This->fileinfo[handle]);
    pdir = pfinfo->pdir;
    dirname = pfinfo->path;
    file_attributes = 0;

    switch (info_class)
    {
        case FileBothDirectoryInformation:

            /* If a search pattern is received, remember this pattern, and restart search */
            if (pattern[0] != 0)
            {
                strncpy(pfinfo->pattern, 1 + strrchr(pattern, '/'), PATH_MAX - 1);
                rewinddir(pdir);
            }

            /* find next dirent matching pattern */
            pdirent = readdir(pdir);
            while (pdirent && fnmatch(pfinfo->pattern, pdirent->d_name, 0) != 0)
                pdirent = readdir(pdir);

            if (pdirent == NULL)
                return STATUS_NO_MORE_FILES;

            /* Get information for directory entry */
            sprintf(fullpath, "%s/%s", dirname, pdirent->d_name);

            if (stat(fullpath, &fstat))
            {
                switch (errno)
                {
                    case ENOENT:
                    case ELOOP:
                    case EACCES:
                        /* These are non-fatal errors. */
                        memset(&fstat, 0, sizeof(fstat));
                        break;
                    default:
                        /* Fatal error. By returning STATUS_NO_SUCH_FILE,
                           the directory list operation will be aborted */
                        perror(fullpath);
                        out_uint8(out, 0);
                        return STATUS_NO_SUCH_FILE;
                }
            }

            if (S_ISDIR(fstat.st_mode))
                file_attributes |= FILE_ATTRIBUTE_DIRECTORY;
            if (pdirent->d_name[0] == '.')
                file_attributes |= FILE_ATTRIBUTE_HIDDEN;
            if (!file_attributes)
                file_attributes |= FILE_ATTRIBUTE_NORMAL;
            if (!(fstat.st_mode & S_IWUSR))
                file_attributes |= FILE_ATTRIBUTE_READONLY;

            /* Return requested information */
            out_uint8s(out, 8); /* unknown zero */

            seconds_since_1970_to_filetime(get_create_time(&fstat), &ft_high, &ft_low);
            out_uint32_le(out, ft_low); /* create time */
            out_uint32_le(out, ft_high);

            seconds_since_1970_to_filetime(fstat.st_atime, &ft_high, &ft_low);
            out_uint32_le(out, ft_low); /* last_access_time */
            out_uint32_le(out, ft_high);

            seconds_since_1970_to_filetime(fstat.st_mtime, &ft_high, &ft_low);
            out_uint32_le(out, ft_low); /* last_write_time */
            out_uint32_le(out, ft_high);

            seconds_since_1970_to_filetime(fstat.st_ctime, &ft_high, &ft_low);
            out_uint32_le(out, ft_low); /* change_write_time */
            out_uint32_le(out, ft_high);

            out_uint32_le(out, fstat.st_size);  /* filesize low */
            out_uint32_le(out, 0);  /* filesize high */
            out_uint32_le(out, fstat.st_size);  /* filesize low */
            out_uint32_le(out, 0);  /* filesize high */
            out_uint32_le(out, file_attributes);
            out_uint8(out, 2 * strlen(pdirent->d_name) + 2);    /* unicode length */
            out_uint8s(out, 7); /* pad? */
            out_uint8(out, 0);  /* 8.3 file length */
            out_uint8s(out, 2 * 12);    /* 8.3 unicode length */
            rdp_out_unistr(This, out, pdirent->d_name, 2 * strlen(pdirent->d_name));
            break;

        default:
            /* FIXME: Support FileDirectoryInformation,
               FileFullDirectoryInformation, and
               FileNamesInformation */

            unimpl("IRP Query Directory sub: 0x%x\n", info_class);
            return STATUS_INVALID_PARAMETER;
    }

    return STATUS_SUCCESS;
}



static NTSTATUS
disk_device_control(RDPCLIENT * This, NTHANDLE handle, uint32 request, STREAM in, STREAM out)
{
    if (((request >> 16) != 20) || ((request >> 16) != 9))
        return STATUS_INVALID_PARAMETER;

    /* extract operation */
    request >>= 2;
    request &= 0xfff;

    printf("DISK IOCTL %d\n", request);

    switch (request)
    {
        case 25:    /* ? */
        case 42:    /* ? */
        default:
            unimpl("DISK IOCTL %d\n", request);
            return STATUS_INVALID_PARAMETER;
    }

    return STATUS_SUCCESS;
}

DEVICE_FNS disk_fns = {
    disk_create,
    disk_close,
    disk_read,
    disk_write,
    disk_device_control /* device_control */
};