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/*
* Auditing VFS module for samba. Log selected file operations to syslog
* facility.
*
* Copyright (C) Tim Potter, 1999-2001
*
* 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>
#ifndef SYSLOG_FACILITY
#define SYSLOG_FACILITY LOG_USER
#endif
#ifndef SYSLOG_PRIORITY
#define SYSLOG_PRIORITY LOG_NOTICE
#endif
static struct vfs_ops default_vfs_ops;
/* Implementation of vfs_ops. Pass everything on to the default
operation but log event first. */
static int audit_connect(struct connection_struct *conn, const char *svc,
const char *user)
{
syslog(SYSLOG_PRIORITY, "connect to service %s by user %s\n",
svc, user);
return 0; /* Success */
}
static void audit_disconnect(struct connection_struct *conn)
{
syslog(SYSLOG_PRIORITY, "disconnected\n");
}
static DIR *audit_opendir(struct connection_struct *conn, const char *fname)
{
DIR *result = default_vfs_ops.opendir(conn, fname);
syslog(SYSLOG_PRIORITY, "opendir %s %s%s\n",
fname,
(result == NULL) ? "failed: " : "",
(result == NULL) ? strerror(errno) : "");
return result;
}
static int audit_mkdir(struct connection_struct *conn, const char *path,
mode_t mode)
{
int result = default_vfs_ops.mkdir(conn, path, mode);
syslog(SYSLOG_PRIORITY, "mkdir %s %s%s\n",
path,
(result < 0) ? "failed: " : "",
(result < 0) ? strerror(errno) : "");
return result;
}
static int audit_rmdir(struct connection_struct *conn, const char *path)
{
int result = default_vfs_ops.rmdir(conn, path);
syslog(SYSLOG_PRIORITY, "rmdir %s %s%s\n",
path,
(result < 0) ? "failed: " : "",
(result < 0) ? strerror(errno) : "");
return result;
}
static int audit_open(struct connection_struct *conn, const char *fname,
int flags, mode_t mode)
{
int result = default_vfs_ops.open(conn, fname, flags, mode);
syslog(SYSLOG_PRIORITY, "open %s (fd %d) %s%s%s\n",
fname, result,
((flags & O_WRONLY) || (flags & O_RDWR)) ? "for writing " : "",
(result < 0) ? "failed: " : "",
(result < 0) ? strerror(errno) : "");
return result;
}
static int audit_close(struct files_struct *fsp, int fd)
{
int result = default_vfs_ops.close(fsp, fd);
syslog(SYSLOG_PRIORITY, "close fd %d %s%s\n",
fd,
(result < 0) ? "failed: " : "",
(result < 0) ? strerror(errno) : "");
return result;
}
static int audit_rename(struct connection_struct *conn, const char *old,
const char *new)
{
int result = default_vfs_ops.rename(conn, old, new);
syslog(SYSLOG_PRIORITY, "rename %s -> %s %s%s\n",
old, new,
(result < 0) ? "failed: " : "",
(result < 0) ? strerror(errno) : "");
return result;
}
static int audit_unlink(struct connection_struct *conn, const char *path)
{
int result = default_vfs_ops.unlink(conn, path);
syslog(SYSLOG_PRIORITY, "unlink %s %s%s\n",
path,
(result < 0) ? "failed: " : "",
(result < 0) ? strerror(errno) : "");
return result;
}
static int audit_chmod(struct connection_struct *conn, const char *path,
mode_t mode)
{
int result = default_vfs_ops.chmod(conn, path, mode);
syslog(SYSLOG_PRIORITY, "chmod %s mode 0x%x %s%s\n",
path, mode,
(result < 0) ? "failed: " : "",
(result < 0) ? strerror(errno) : "");
return result;
}
/* VFS initialisation function. Return initialised vfs_ops structure
back to SAMBA. */
struct vfs_ops *vfs_init(int *vfs_version, struct vfs_ops *ops)
{
*vfs_version = SMB_VFS_INTERFACE_VERSION;
openlog("smbd_audit", LOG_PID, SYSLOG_FACILITY);
syslog(SYSLOG_PRIORITY, "initialised\n");
/* Save a copy of the default ops */
default_vfs_ops = *ops;
/* Override our ones */
ops->connect = audit_connect;
ops->disconnect = audit_disconnect;
ops->opendir = audit_opendir;
ops->mkdir = audit_mkdir;
ops->rmdir = audit_rmdir;
ops->open = audit_open;
ops->close = audit_close;
ops->rename = audit_rename;
ops->unlink = audit_unlink;
ops->chmod = audit_chmod;
return(ops);
}
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