Adding upstream version 3:4.8.29.upstream/3%4.8.29upstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 846 insertions, 0 deletions

diff --git a/src/vfs/undelfs/undelfs.c b/src/vfs/undelfs/undelfs.c
new file mode 100644
index 0000000..f46e314
--- /dev/null
+++ b/src/vfs/undelfs/undelfs.c
@@ -0,0 +1,846 @@
+/*
+   UnDel File System: Midnight Commander file system.
+
+   This file system is intended to be used together with the
+   ext2fs library to recover files from ext2fs file systems.
+
+   Parts of this program were taken from the lsdel.c and dump.c files
+   written by Ted Ts'o (tytso@mit.edu) for the ext2fs package.
+
+   Copyright (C) 1995-2022
+   Free Software Foundation, Inc.
+
+   Written by:
+   Miguel de Icaza, 1995
+   Norbert Warmuth, 1997
+   Pavel Machek, 2000
+
+   This file is part of the Midnight Commander.
+
+   The Midnight Commander 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 3 of the License,
+   or (at your option) any later version.
+
+   The Midnight Commander 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, see <http://www.gnu.org/licenses/>.
+ */
+
+/**
+ * \file
+ * \brief Source: UnDel File System
+ *
+ * Assumptions:
+ *
+ * 1. We don't handle directories (thus undelfs_get_path is easy to write).
+ * 2. Files are on the local file system (we do not support vfs files
+ *    because we would have to provide an io_manager for the ext2fs tools,
+ *    and I don't think it would be too useful to undelete files
+ */
+
+#include <config.h>
+
+#include <errno.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>             /* memset() */
+#include <ext2fs/ext2_fs.h>
+#include <ext2fs/ext2fs.h>
+#include <ctype.h>
+
+#include "lib/global.h"
+
+#include "lib/util.h"
+#include "lib/widget.h"         /* message() */
+#include "lib/vfs/xdirentry.h"
+#include "lib/vfs/utilvfs.h"
+#include "lib/vfs/vfs.h"
+
+#include "undelfs.h"
+
+/*** global variables ****************************************************************************/
+
+/*** file scope macro definitions ****************************************************************/
+
+/* To generate the . and .. entries use -2 */
+#define READDIR_PTR_INIT 0
+
+#define undelfs_stat undelfs_lstat
+
+/*** file scope type declarations ****************************************************************/
+
+struct deleted_info
+{
+    ext2_ino_t ino;
+    unsigned short mode;
+    unsigned short uid;
+    unsigned short gid;
+    unsigned long size;
+    time_t dtime;
+    int num_blocks;
+    int free_blocks;
+};
+
+struct lsdel_struct
+{
+    ext2_ino_t inode;
+    int num_blocks;
+    int free_blocks;
+    int bad_blocks;
+};
+
+typedef struct
+{
+    int f_index;                /* file index into delarray */
+    char *buf;
+    int error_code;             /*  */
+    off_t pos;                  /* file position */
+    off_t current;              /* used to determine current position in itereate */
+    gboolean finished;
+    ext2_ino_t inode;
+    int bytes_read;
+    off_t size;
+
+    /* Used by undelfs_read: */
+    char *dest_buffer;          /* destination buffer */
+    size_t count;               /* bytes to read */
+} undelfs_file;
+
+/*** file scope variables ************************************************************************/
+
+/* We only allow one opened ext2fs */
+static char *ext2_fname;
+static ext2_filsys fs = NULL;
+static struct lsdel_struct lsd;
+static struct deleted_info *delarray;
+static int num_delarray, max_delarray;
+static char *block_buf;
+static const char *undelfserr = N_("undelfs: error");
+static int readdir_ptr;
+static int undelfs_usage;
+
+static struct vfs_s_subclass undelfs_subclass;
+static struct vfs_class *vfs_undelfs_ops = VFS_CLASS (&undelfs_subclass);
+
+/* --------------------------------------------------------------------------------------------- */
+/*** file scope functions ************************************************************************/
+/* --------------------------------------------------------------------------------------------- */
+
+static void
+undelfs_shutdown (void)
+{
+    if (fs)
+        ext2fs_close (fs);
+    fs = NULL;
+    MC_PTR_FREE (ext2_fname);
+    MC_PTR_FREE (delarray);
+    MC_PTR_FREE (block_buf);
+}
+
+/* --------------------------------------------------------------------------------------------- */
+
+static void
+undelfs_get_path (const vfs_path_t * vpath, char **fsname, char **file)
+{
+    const char *p, *dirname;
+    const vfs_path_element_t *path_element;
+
+    path_element = vfs_path_get_by_index (vpath, -1);
+
+    /* To look like filesystem, we have virtual directories
+       undel://XXX, which have no subdirectories. XXX is replaced with
+       hda5, sdb8 etc, which is assumed to live under /dev. 
+       -- pavel@ucw.cz */
+
+    dirname = path_element->path;
+
+    *fsname = NULL;
+
+    if (strncmp (dirname, "undel://", 8) != 0)
+        return;
+
+    dirname += 8;
+
+    /* Since we don't allow subdirectories, it's easy to get a filename,
+     * just scan backwards for a slash */
+    if (*dirname == 0)
+        return;
+
+    p = dirname + strlen (dirname);
+#if 0
+    /* Strip trailing ./
+     */
+    if (p - dirname > 2 && IS_PATH_SEP (p[-1]) && p[-2] == '.')
+        *(p = p - 2) = 0;
+#endif
+
+    while (p > dirname)
+    {
+        if (IS_PATH_SEP (*p))
+        {
+            char *tmp;
+
+            *file = g_strdup (p + 1);
+            tmp = g_strndup (dirname, p - dirname);
+            *fsname = g_strconcat ("/dev/", tmp, (char *) NULL);
+            g_free (tmp);
+            return;
+        }
+        p--;
+    }
+    *file = g_strdup ("");
+    *fsname = g_strconcat ("/dev/", dirname, (char *) NULL);
+}
+
+/* --------------------------------------------------------------------------------------------- */
+
+static int
+undelfs_lsdel_proc (ext2_filsys _fs, blk_t * block_nr, int blockcnt, void *private)
+{
+    struct lsdel_struct *_lsd = (struct lsdel_struct *) private;
+    (void) blockcnt;
+    _lsd->num_blocks++;
+
+    if (*block_nr < _fs->super->s_first_data_block || *block_nr >= _fs->super->s_blocks_count)
+    {
+        _lsd->bad_blocks++;
+        return BLOCK_ABORT;
+    }
+
+    if (!ext2fs_test_block_bitmap (_fs->block_map, *block_nr))
+        _lsd->free_blocks++;
+
+    return 0;
+}
+
+/* --------------------------------------------------------------------------------------------- */
+/**
+ * Load information about deleted files.
+ * Don't abort if there is not enough memory - load as much as we can.
+ */
+
+static int
+undelfs_loaddel (void)
+{
+    int retval, count;
+    ext2_ino_t ino;
+    struct ext2_inode inode;
+    ext2_inode_scan scan;
+
+    max_delarray = 100;
+    num_delarray = 0;
+    delarray = g_try_malloc (sizeof (struct deleted_info) * max_delarray);
+    if (!delarray)
+    {
+        message (D_ERROR, undelfserr, "%s", _("not enough memory"));
+        return 0;
+    }
+    block_buf = g_try_malloc (fs->blocksize * 3);
+    if (!block_buf)
+    {
+        message (D_ERROR, undelfserr, "%s", _("while allocating block buffer"));
+        goto free_delarray;
+    }
+    retval = ext2fs_open_inode_scan (fs, 0, &scan);
+    if (retval != 0)
+    {
+        message (D_ERROR, undelfserr, _("open_inode_scan: %d"), retval);
+        goto free_block_buf;
+    }
+    retval = ext2fs_get_next_inode (scan, &ino, &inode);
+    if (retval != 0)
+    {
+        message (D_ERROR, undelfserr, _("while starting inode scan %d"), retval);
+        goto error_out;
+    }
+    count = 0;
+    while (ino)
+    {
+        if ((count++ % 1024) == 0)
+            vfs_print_message (_("undelfs: loading deleted files information %d inodes"), count);
+        if (inode.i_dtime == 0)
+            goto next;
+
+        if (S_ISDIR (inode.i_mode))
+            goto next;
+
+        lsd.inode = ino;
+        lsd.num_blocks = 0;
+        lsd.free_blocks = 0;
+        lsd.bad_blocks = 0;
+
+        retval = ext2fs_block_iterate (fs, ino, 0, block_buf, undelfs_lsdel_proc, &lsd);
+        if (retval)
+        {
+            message (D_ERROR, undelfserr, _("while calling ext2_block_iterate %d"), retval);
+            goto next;
+        }
+        if (lsd.free_blocks && !lsd.bad_blocks)
+        {
+            if (num_delarray >= max_delarray)
+            {
+                struct deleted_info *delarray_new = g_try_realloc (delarray,
+                                                                   sizeof (struct deleted_info) *
+                                                                   (max_delarray + 50));
+                if (!delarray_new)
+                {
+                    message (D_ERROR, undelfserr, "%s",
+                             _("no more memory while reallocating array"));
+                    goto error_out;
+                }
+                delarray = delarray_new;
+                max_delarray += 50;
+            }
+
+            delarray[num_delarray].ino = ino;
+            delarray[num_delarray].mode = inode.i_mode;
+            delarray[num_delarray].uid = inode.i_uid;
+            delarray[num_delarray].gid = inode.i_gid;
+            delarray[num_delarray].size = inode.i_size;
+            delarray[num_delarray].dtime = inode.i_dtime;
+            delarray[num_delarray].num_blocks = lsd.num_blocks;
+            delarray[num_delarray].free_blocks = lsd.free_blocks;
+            num_delarray++;
+        }
+
+      next:
+        retval = ext2fs_get_next_inode (scan, &ino, &inode);
+        if (retval)
+        {
+            message (D_ERROR, undelfserr, _("while doing inode scan %d"), retval);
+            goto error_out;
+        }
+    }
+    readdir_ptr = READDIR_PTR_INIT;
+    ext2fs_close_inode_scan (scan);
+    return 1;
+
+  error_out:
+    ext2fs_close_inode_scan (scan);
+  free_block_buf:
+    MC_PTR_FREE (block_buf);
+  free_delarray:
+    MC_PTR_FREE (delarray);
+    return 0;
+}
+
+/* --------------------------------------------------------------------------------------------- */
+
+static void *
+undelfs_opendir (const vfs_path_t * vpath)
+{
+    char *file, *f = NULL;
+    const vfs_path_element_t *path_element;
+
+    path_element = vfs_path_get_by_index (vpath, -1);
+    undelfs_get_path (vpath, &file, &f);
+    if (file == NULL)
+    {
+        g_free (f);
+        return 0;
+    }
+
+    /* We don't use the file name */
+    g_free (f);
+
+    if (!ext2_fname || strcmp (ext2_fname, file))
+    {
+        undelfs_shutdown ();
+        ext2_fname = file;
+    }
+    else
+    {
+        /* To avoid expensive re-scannings */
+        readdir_ptr = READDIR_PTR_INIT;
+        g_free (file);
+        return fs;
+    }
+
+    if (ext2fs_open (ext2_fname, 0, 0, 0, unix_io_manager, &fs))
+    {
+        message (D_ERROR, undelfserr, _("Cannot open file %s"), ext2_fname);
+        return 0;
+    }
+    vfs_print_message ("%s", _("undelfs: reading inode bitmap..."));
+    if (ext2fs_read_inode_bitmap (fs))
+    {
+        message (D_ERROR, undelfserr, _("Cannot load inode bitmap from:\n%s"), ext2_fname);
+        goto quit_opendir;
+    }
+    vfs_print_message ("%s", _("undelfs: reading block bitmap..."));
+    if (ext2fs_read_block_bitmap (fs))
+    {
+        message (D_ERROR, undelfserr, _("Cannot load block bitmap from:\n%s"), ext2_fname);
+        goto quit_opendir;
+    }
+    /* Now load the deleted information */
+    if (!undelfs_loaddel ())
+        goto quit_opendir;
+    vfs_print_message (_("%s: done."), path_element->class->name);
+    return fs;
+  quit_opendir:
+    vfs_print_message (_("%s: failure"), path_element->class->name);
+    ext2fs_close (fs);
+    fs = NULL;
+    return 0;
+}
+
+/* --------------------------------------------------------------------------------------------- */
+
+static struct vfs_dirent *
+undelfs_readdir (void *vfs_info)
+{
+    struct vfs_dirent *dirent;
+
+    if (vfs_info != fs)
+    {
+        message (D_ERROR, undelfserr, "%s", _("vfs_info is not fs!"));
+        return NULL;
+    }
+    if (readdir_ptr == num_delarray)
+        return NULL;
+    if (readdir_ptr < 0)
+        dirent = vfs_dirent_init (NULL, readdir_ptr == -2 ? "." : "..", 0);     /* FIXME: inode */
+    else
+    {
+        char dirent_dest[MC_MAXPATHLEN];
+
+        g_snprintf (dirent_dest, MC_MAXPATHLEN, "%ld:%d",
+                    (long) delarray[readdir_ptr].ino, delarray[readdir_ptr].num_blocks);
+        dirent = vfs_dirent_init (NULL, dirent_dest, 0);        /* FIXME: inode */
+    }
+    readdir_ptr++;
+
+    return dirent;
+}
+
+/* --------------------------------------------------------------------------------------------- */
+
+static int
+undelfs_closedir (void *vfs_info)
+{
+    (void) vfs_info;
+    return 0;
+}
+
+/* --------------------------------------------------------------------------------------------- */
+/* We do not support lseek */
+
+static void *
+undelfs_open (const vfs_path_t * vpath, int flags, mode_t mode)
+{
+    char *file, *f = NULL;
+    ext2_ino_t inode, i;
+    undelfs_file *p = NULL;
+    (void) flags;
+    (void) mode;
+
+    /* Only allow reads on this file system */
+    undelfs_get_path (vpath, &file, &f);
+    if (file == NULL)
+    {
+        g_free (f);
+        return 0;
+    }
+
+    if (!ext2_fname || strcmp (ext2_fname, file))
+    {
+        message (D_ERROR, undelfserr, "%s", _("You have to chdir to extract files first"));
+        g_free (file);
+        g_free (f);
+        return 0;
+    }
+    inode = atol (f);
+
+    /* Search the file into delarray */
+    for (i = 0; i < (ext2_ino_t) num_delarray; i++)
+    {
+        if (inode != delarray[i].ino)
+            continue;
+
+        /* Found: setup all the structures needed by read */
+        p = (undelfs_file *) g_try_malloc (((gsize) sizeof (undelfs_file)));
+        if (!p)
+        {
+            g_free (file);
+            g_free (f);
+            return 0;
+        }
+        p->buf = g_try_malloc (fs->blocksize);
+        if (!p->buf)
+        {
+            g_free (p);
+            g_free (file);
+            g_free (f);
+            return 0;
+        }
+        p->inode = inode;
+        p->finished = FALSE;
+        p->f_index = i;
+        p->error_code = 0;
+        p->pos = 0;
+        p->size = delarray[i].size;
+    }
+    g_free (file);
+    g_free (f);
+    undelfs_usage++;
+    return p;
+}
+
+/* --------------------------------------------------------------------------------------------- */
+
+static int
+undelfs_close (void *vfs_info)
+{
+    undelfs_file *p = vfs_info;
+    g_free (p->buf);
+    g_free (p);
+    undelfs_usage--;
+    return 0;
+}
+
+/* --------------------------------------------------------------------------------------------- */
+
+static int
+undelfs_dump_read (ext2_filsys param_fs, blk_t * blocknr, int blockcnt, void *private)
+{
+    int copy_count;
+    undelfs_file *p = (undelfs_file *) private;
+
+    if (blockcnt < 0)
+        return 0;
+
+    if (*blocknr)
+    {
+        p->error_code = io_channel_read_blk (param_fs->io, *blocknr, 1, p->buf);
+        if (p->error_code)
+            return BLOCK_ABORT;
+    }
+    else
+        memset (p->buf, 0, param_fs->blocksize);
+
+    if (p->pos + (off_t) p->count < p->current)
+    {
+        p->finished = TRUE;
+        return BLOCK_ABORT;
+    }
+    if (p->pos > p->current + param_fs->blocksize)
+    {
+        p->current += param_fs->blocksize;
+        return 0;               /* we have not arrived yet */
+    }
+
+    /* Now, we know we have to extract some data */
+    if (p->pos >= p->current)
+    {
+
+        /* First case: starting pointer inside this block */
+        if (p->pos + (off_t) p->count <= p->current + param_fs->blocksize)
+        {
+            /* Fully contained */
+            copy_count = p->count;
+            p->finished = (p->count != 0);
+        }
+        else
+        {
+            /* Still some more data */
+            copy_count = param_fs->blocksize - (p->pos - p->current);
+        }
+        memcpy (p->dest_buffer, p->buf + (p->pos - p->current), copy_count);
+    }
+    else
+    {
+        /* Second case: we already have passed p->pos */
+        if (p->pos + (off_t) p->count < p->current + param_fs->blocksize)
+        {
+            copy_count = (p->pos + p->count) - p->current;
+            p->finished = (p->count != 0);
+        }
+        else
+        {
+            copy_count = param_fs->blocksize;
+        }
+        memcpy (p->dest_buffer, p->buf, copy_count);
+    }
+    p->dest_buffer += copy_count;
+    p->current += param_fs->blocksize;
+    if (p->finished)
+    {
+        return BLOCK_ABORT;
+    }
+    return 0;
+}
+
+/* --------------------------------------------------------------------------------------------- */
+
+static ssize_t
+undelfs_read (void *vfs_info, char *buffer, size_t count)
+{
+    undelfs_file *p = vfs_info;
+    int retval;
+
+    p->dest_buffer = buffer;
+    p->current = 0;
+    p->finished = FALSE;
+    p->count = count;
+
+    if (p->pos + (off_t) p->count > p->size)
+    {
+        p->count = p->size - p->pos;
+    }
+    retval = ext2fs_block_iterate (fs, p->inode, 0, NULL, undelfs_dump_read, p);
+    if (retval)
+    {
+        message (D_ERROR, undelfserr, "%s", _("while iterating over blocks"));
+        return -1;
+    }
+    if (p->error_code && !p->finished)
+        return 0;
+    p->pos = p->pos + (p->dest_buffer - buffer);
+    return p->dest_buffer - buffer;
+}
+
+/* --------------------------------------------------------------------------------------------- */
+
+static long
+undelfs_getindex (char *path)
+{
+    ext2_ino_t inode = atol (path);
+    int i;
+
+    for (i = 0; i < num_delarray; i++)
+    {
+        if (delarray[i].ino == inode)
+            return i;
+    }
+    return -1;
+}
+
+/* --------------------------------------------------------------------------------------------- */
+
+static int
+undelfs_stat_int (int inode_index, struct stat *buf)
+{
+    buf->st_dev = 0;
+    buf->st_ino = delarray[inode_index].ino;
+    buf->st_mode = delarray[inode_index].mode;
+    buf->st_nlink = 1;
+    buf->st_uid = delarray[inode_index].uid;
+    buf->st_gid = delarray[inode_index].gid;
+    buf->st_size = delarray[inode_index].size;
+    buf->st_atime = delarray[inode_index].dtime;
+    buf->st_ctime = delarray[inode_index].dtime;
+    buf->st_mtime = delarray[inode_index].dtime;
+#ifdef HAVE_STRUCT_STAT_ST_MTIM
+    buf->st_atim.tv_nsec = buf->st_mtim.tv_nsec = buf->st_ctim.tv_nsec = 0;
+#endif
+    return 0;
+}
+
+/* --------------------------------------------------------------------------------------------- */
+
+static int
+undelfs_lstat (const vfs_path_t * vpath, struct stat *buf)
+{
+    int inode_index;
+    char *file, *f = NULL;
+
+    undelfs_get_path (vpath, &file, &f);
+    if (file == NULL)
+    {
+        g_free (f);
+        return 0;
+    }
+
+    /* When called from save_cwd_stats we get an incorrect file and f here:
+       e.g. incorrect                         correct
+       path = "undel:/dev/sda1"          path="undel:/dev/sda1/401:1"
+       file = "/dev"                     file="/dev/sda1"
+       f    = "sda1"                     f   ="401:1"
+       If the first char in f is no digit -> return error */
+    if (!isdigit (*f))
+    {
+        g_free (file);
+        g_free (f);
+        return -1;
+    }
+
+    if (!ext2_fname || strcmp (ext2_fname, file))
+    {
+        g_free (file);
+        g_free (f);
+        message (D_ERROR, undelfserr, "%s", _("You have to chdir to extract files first"));
+        return 0;
+    }
+    inode_index = undelfs_getindex (f);
+    g_free (file);
+    g_free (f);
+
+    if (inode_index == -1)
+        return -1;
+
+    return undelfs_stat_int (inode_index, buf);
+}
+
+/* --------------------------------------------------------------------------------------------- */
+
+static int
+undelfs_fstat (void *vfs_info, struct stat *buf)
+{
+    undelfs_file *p = vfs_info;
+
+    return undelfs_stat_int (p->f_index, buf);
+}
+
+/* --------------------------------------------------------------------------------------------- */
+
+static int
+undelfs_chdir (const vfs_path_t * vpath)
+{
+    char *file, *f = NULL;
+    int fd;
+
+    undelfs_get_path (vpath, &file, &f);
+    if (file == NULL)
+    {
+        g_free (f);
+        return (-1);
+    }
+
+    /* We may use access because ext2 file systems are local */
+    /* this could be fixed by making an ext2fs io manager to use */
+    /* our vfs, but that is left as an exercise for the reader */
+    fd = open (file, O_RDONLY);
+    if (fd == -1)
+    {
+        message (D_ERROR, undelfserr, _("Cannot open file \"%s\""), file);
+        g_free (f);
+        g_free (file);
+        return -1;
+    }
+    close (fd);
+    g_free (f);
+    g_free (file);
+    return 0;
+}
+
+/* --------------------------------------------------------------------------------------------- */
+
+/* this has to stay here for now: vfs layer does not know how to emulate it */
+static off_t
+undelfs_lseek (void *vfs_info, off_t offset, int whence)
+{
+    (void) vfs_info;
+    (void) offset;
+    (void) whence;
+
+    return -1;
+}
+
+/* --------------------------------------------------------------------------------------------- */
+
+static vfsid
+undelfs_getid (const vfs_path_t * vpath)
+{
+    char *fname = NULL, *fsname;
+    gboolean ok;
+
+    undelfs_get_path (vpath, &fsname, &fname);
+    ok = fsname != NULL;
+
+    g_free (fname);
+    g_free (fsname);
+
+    return ok ? (vfsid) fs : NULL;
+}
+
+/* --------------------------------------------------------------------------------------------- */
+
+static gboolean
+undelfs_nothingisopen (vfsid id)
+{
+    (void) id;
+
+    return (undelfs_usage == 0);
+}
+
+/* --------------------------------------------------------------------------------------------- */
+
+static void
+undelfs_free (vfsid id)
+{
+    (void) id;
+
+    undelfs_shutdown ();
+}
+
+/* --------------------------------------------------------------------------------------------- */
+
+#ifdef ENABLE_NLS
+static int
+undelfs_init (struct vfs_class *me)
+{
+    (void) me;
+
+    undelfserr = _(undelfserr);
+    return 1;
+}
+#else
+#define undelfs_init NULL
+#endif
+
+/* --------------------------------------------------------------------------------------------- */
+/*** public functions ****************************************************************************/
+/* --------------------------------------------------------------------------------------------- */
+/**
+ * This function overrides com_err() from libcom_err library.
+ * It is used in libext2fs to report errors.
+ */
+
+void
+com_err (const char *whoami, long err_code, const char *fmt, ...)
+{
+    va_list ap;
+    char *str;
+
+    va_start (ap, fmt);
+    str = g_strdup_vprintf (fmt, ap);
+    va_end (ap);
+
+    message (D_ERROR, _("Ext2lib error"), "%s (%s: %ld)", str, whoami, err_code);
+    g_free (str);
+}
+
+/* --------------------------------------------------------------------------------------------- */
+
+void
+vfs_init_undelfs (void)
+{
+    /* NULLize vfs_s_subclass members */
+    memset (&undelfs_subclass, 0, sizeof (undelfs_subclass));
+
+    vfs_init_class (vfs_undelfs_ops, "undelfs", VFSF_UNKNOWN, "undel");
+    vfs_undelfs_ops->init = undelfs_init;
+    vfs_undelfs_ops->open = undelfs_open;
+    vfs_undelfs_ops->close = undelfs_close;
+    vfs_undelfs_ops->read = undelfs_read;
+    vfs_undelfs_ops->opendir = undelfs_opendir;
+    vfs_undelfs_ops->readdir = undelfs_readdir;
+    vfs_undelfs_ops->closedir = undelfs_closedir;
+    vfs_undelfs_ops->stat = undelfs_stat;
+    vfs_undelfs_ops->lstat = undelfs_lstat;
+    vfs_undelfs_ops->fstat = undelfs_fstat;
+    vfs_undelfs_ops->chdir = undelfs_chdir;
+    vfs_undelfs_ops->lseek = undelfs_lseek;
+    vfs_undelfs_ops->getid = undelfs_getid;
+    vfs_undelfs_ops->nothingisopen = undelfs_nothingisopen;
+    vfs_undelfs_ops->free = undelfs_free;
+    vfs_register_class (vfs_undelfs_ops);
+}
+
+/* --------------------------------------------------------------------------------------------- */