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/*
* Auditing VFS module for samba. Log selected file operations to syslog
* facility.
*
* Copyright (C) 2001, Brandon Stone, Amherst College, <bbstone@amherst.edu>.
* Copyright (C) 2002, Jeremy Allison - modified to make a VFS module.
* Copyright (C) 2002, Alexander Bokovoy - cascaded VFS adoption,
*
* 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., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
#include "config.h"
#include <stdio.h>
#include <sys/stat.h>
#ifdef HAVE_UTIME_H
#include <utime.h>
#endif
#ifdef HAVE_DIRENT_H
#include <dirent.h>
#endif
#include <syslog.h>
#ifdef HAVE_FCNTL_H
#include <fcntl.h>
#endif
#include <errno.h>
#include <string.h>
#include <includes.h>
#include <vfs.h>
/* VFS operations */
static struct vfs_ops default_vfs_ops; /* For passthrough operation */
static struct smb_vfs_handle_struct *recycle_handle;
static int recycle_unlink(connection_struct *, const char *);
static int recycle_connect(struct connection_struct *conn, const char *service, const char *user);
static void recycle_disconnect(struct connection_struct *conn);
static vfs_op_tuple recycle_ops[] = {
/* Disk operations */
{recycle_connect, SMB_VFS_OP_CONNECT, SMB_VFS_LAYER_OPAQUE},
{recycle_disconnect, SMB_VFS_OP_DISCONNECT, SMB_VFS_LAYER_OPAQUE},
/* File operations */
{recycle_unlink, SMB_VFS_OP_UNLINK, SMB_VFS_LAYER_OPAQUE},
{NULL, SMB_VFS_OP_NOOP, SMB_VFS_LAYER_NOOP}
};
/* VFS initialisation function. Return initialised vfs_op_tuple array back to SAMBA. */
vfs_op_tuple *vfs_init(int *vfs_version, struct vfs_ops *def_vfs_ops,
struct smb_vfs_handle_struct *vfs_handle)
{
*vfs_version = SMB_VFS_INTERFACE_VERSION;
memcpy(&default_vfs_ops, def_vfs_ops, sizeof(struct vfs_ops));
DEBUG(5,("vfs_init: for recycle!\n"));
/* Remember vfs_id for storing private information at connect */
recycle_handle = vfs_handle;
return recycle_ops;
}
/* VFS finalization function. */
void vfs_done(connection_struct *conn)
{
DEBUG(5,("vfs_done_recycle: called for connection %p\n",conn));
}
static int recycle_connect(struct connection_struct *conn, const char *service, const char *user)
{
fstring recycle_bin;
DEBUG(4,("recycle_connect: called for service %s as user %s\n", service, user));
fstrcpy(recycle_bin, (const char *)lp_parm_string(lp_servicename(SNUM(conn)),"vfs","recycle bin"));
if (!*recycle_bin) {
DEBUG(0,("recycle_connect: No options listed (vfs:recycle bin).\n" ));
return 0; /* No options. */
}
standard_sub_conn(conn,recycle_bin,sizeof(fstring));
DEBUG(3,("recycle_connect: recycle name is %s\n", recycle_bin ));
recycle_handle->data = (void *)strdup(recycle_bin);
return 0;
}
static void recycle_disconnect(struct connection_struct *conn)
{
SAFE_FREE(recycle_handle->data);
}
static BOOL recycle_XXX_exist(connection_struct *conn, const char *dname, BOOL isdir)
{
SMB_STRUCT_STAT st;
if (default_vfs_ops.stat(conn,dname,&st) != 0)
return(False);
if (isdir)
return S_ISDIR(st.st_mode) ? True : False;
else
return S_ISREG(st.st_mode) ? True : False;
}
static BOOL recycle_directory_exist(connection_struct *conn, const char *dname)
{
return recycle_XXX_exist(conn, dname, True);
}
static BOOL recycle_file_exist(connection_struct *conn, const char *fname)
{
return recycle_XXX_exist(conn, fname, False);
}
static SMB_OFF_T recycle_get_file_size(connection_struct *conn, const char *fname)
{
SMB_STRUCT_STAT st;
if (default_vfs_ops.stat(conn,fname,&st) != 0)
return (SMB_OFF_T)-1;
return(st.st_size);
}
/********************************************************************
Check if file should be recycled
*********************************************************************/
static int recycle_unlink(connection_struct *conn, const char *inname)
{
fstring recycle_bin;
pstring fname;
char *base, *ext;
pstring bin;
int i=1, len, addlen;
int dir_mask=0770;
SMB_BIG_UINT dfree,dsize,bsize;
*recycle_bin = '\0';
pstrcpy(fname, inname);
if (recycle_handle->data)
fstrcpy(recycle_bin, (const char *)recycle_handle->data);
if(!*recycle_bin) {
DEBUG(1, ("recycle bin: share parameter not set, purging %s...\n", fname));
return default_vfs_ops.unlink(conn,fname);
}
if(recycle_get_file_size(conn, fname) == 0) {
DEBUG(3, ("recycle bin: file %s is empty, purging...\n", fname));
return default_vfs_ops.unlink(conn,fname);
}
base = strrchr(fname, '/');
pstrcpy(bin, recycle_bin);
pstrcat(bin, "/");
if(base == NULL) {
ext = strrchr(fname, '.');
pstrcat(bin, fname);
} else {
ext = strrchr(base, '.');
pstrcat(bin, base+1);
}
DEBUG(4, ("recycle bin: base %s, ext %s, fname %s, bin %s\n", base, ext, fname, bin));
if(strcmp(fname,bin) == 0) {
DEBUG(3, ("recycle bin: file %s exists, purging...\n", fname));
return default_vfs_ops.unlink(conn,fname);
}
len = strlen(bin);
if ( ext != NULL)
len = len - strlen(ext);
addlen = sizeof(pstring)-len-1;
while(recycle_file_exist(conn,bin)) {
slprintf(bin+len, addlen, " (Copy #%d)", i++);
pstrcat(bin, ext);
}
DEBUG(3, ("recycle bin: moving source=%s to dest=%s\n", fname, bin));
default_vfs_ops.disk_free(conn,".",True,&bsize,&dfree,&dsize);
if((unsigned int)dfree > 0) {
int ret;
if(!recycle_directory_exist(conn,recycle_bin)) {
DEBUG(3, ("recycle bin: directory %s nonexistant, creating...\n", recycle_bin));
if (default_vfs_ops.mkdir(conn,recycle_bin,dir_mask) == -1) {
DEBUG(0, ("recycle bin: unable to create directory %s. Error was %s\n",
recycle_bin, strerror(errno) ));
}
}
DEBUG(3, ("recycle bin: move %s -> %s\n", fname, bin));
ret = default_vfs_ops.rename(conn, fname, bin);
if (ret == -1) {
DEBUG(1, ("recycle bin: move error %d (%s)\n", errno, strerror(errno) ));
DEBUG(0, ("recycle bin: move failed, purging...\n"));
return default_vfs_ops.unlink(conn,fname);
}
return ret;
} else {
DEBUG(1, ("recycle bin: move failed, purging...\n"));
return default_vfs_ops.unlink(conn,fname);
}
}
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