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authorOlivier Sessink <oliviersessink@gmail.com>2010-01-18 11:40:33 +0100
committerKarolin Seeger <kseeger@samba.org>2010-01-18 11:41:33 +0100
commit3fb359aa5698e393f37765ab279b5a4ba366f965 (patch)
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s3-docs: Add man page for vfs_scannedonly.
Fix bug #7028.
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+<?xml version="1.0" encoding="iso-8859-1"?>
+<!DOCTYPE refentry PUBLIC "-//Samba-Team//DTD DocBook V4.2-Based Variant V1.0//EN" "http://www.samba.org/samba/DTD/samba-doc">
+<refentry id="vfs_scannedonly.8">
+
+<refmeta>
+ <refentrytitle>vfs_scannedonly</refentrytitle>
+ <manvolnum>8</manvolnum>
+ <refmiscinfo class="source">Samba</refmiscinfo>
+ <refmiscinfo class="manual">System Administration tools</refmiscinfo>
+ <refmiscinfo class="version">3.6</refmiscinfo>
+</refmeta>
+
+
+<refnamediv>
+ <refname>vfs_scannedonly</refname>
+ <refpurpose>Ensures that only files that have been scanned for viruses are
+ visible and accessible to the end user.</refpurpose>
+</refnamediv>
+
+<refsynopsisdiv>
+ <cmdsynopsis>
+ <command>vfs objects = scannedonly</command>
+ </cmdsynopsis>
+</refsynopsisdiv>
+
+<refsect1>
+ <title>DESCRIPTION</title>
+
+ <para>This VFS module is part of the
+ <citerefentry><refentrytitle>samba</refentrytitle>
+ <manvolnum>8</manvolnum></citerefentry> suite.</para>
+
+ <para>The <command>vfs_scannedonly</command> VFS module ensures that
+ only files that have been scanned for viruses are visible and accessible
+ to the end user. If non-scanned files are found an anti-virus scanning
+ daemon is notified. The anti-virus scanning daemon is not part of the
+ Samba suite.
+ </para>
+
+ <para>Scannedonly comes in two parts: a samba vfs module and (one or
+ more) daemons. The daemon scans files. If a certain file is clean,
+ a second file is created with prefix <filename>.scanned:</filename>.
+ The Samba module simply looks if such a <filename>.scanned:</filename>
+ file exists, and is newer than the pertinent file. If this is the case,
+ the file is shown to the user. If this is not the case, the file is not
+ returned in a directory listing (configurable), and cannot be opened
+ (configurable). The Samba vfs module will notify the daemon to scan
+ this file.
+ </para>
+
+ <para>So what happens for the user in the default configuration. The
+ first time a directory is listed, it shows files as 'file is being
+ scanned for viruses, but after the first time all files are shown.
+ There is a utility scannedonly_prescan that can help you to prescan
+ all directories. When new files are written the daemon is notified
+ immediately after the file is complete.
+ </para>
+
+ <para>If a virus is found by the daemon, a file with a warning message
+ is created in the directory of the user, a warning is sent to the logs,
+ and the file is renamed to have prefix <filename>.virus:</filename>.
+ Files with the <filename>.virus:</filename> prefix are never shown to
+ the user and all access is denied.
+ </para>
+
+ <para>This module is stackable.</para>
+
+</refsect1>
+
+<refsect1>
+ <title>CONFIGURATION</title>
+
+ <para><command>vfs_scannedonly</command> relies on a anti-virus scanning
+ daemon that listens on the scannedonly socket (unix domain socket or UDP
+ socket).
+ </para>
+</refsect1>
+
+<refsect1>
+ <title>OPTIONS</title>
+
+ <variablelist>
+ <varlistentry>
+ <term>scannedonly:domain_socket = True </term>
+ <listitem>
+ <para>Whether to use a unix domain socket or not (false reverts
+ to use udp)
+ </para>
+ </listitem>
+ </varlistentry>
+
+ <varlistentry>
+ <term>scannedonly:socketname = /var/lib/scannedonly/scan</term>
+ <listitem>
+ <para>The location of the unix domain socket to connect to</para>
+ </listitem>
+ </varlistentry>
+
+ <varlistentry>
+ <term>scannedonly:portnum = 2020</term>
+ <listitem>
+ <para>The udp port number to connect to
+ </para>
+ </listitem>
+ </varlistentry>
+ <varlistentry><term>scannedonly:scanhost = localhost</term>
+ <listitem>
+ <para>
+ When using UDP the host that runs the scanning daemon (this host
+ needs access to the files!)
+ </para>
+ </listitem>
+ </varlistentry>
+ <varlistentry><term>scannedonly:show_special_files = True</term>
+ <listitem>
+ <para>
+ Whether sockets, devices and fifo's (all not scanned for
+ viruses) should be visible to the user
+ </para>
+ </listitem>
+ </varlistentry>
+ <varlistentry><term>scannedonly:rm_hidden_files_on_rmdir = True</term>
+ <listitem>
+ <para>
+ Whether files that are not visible (<filename>.scanned:</filename>
+ files, <filename>.failed:</filename> files and <filename>.virus:
+ </filename> files) should be deleted if the user tries to remove
+ the directory. If false, the user will get the "directory is not
+ empty" error.
+ </para>
+ </listitem>
+ </varlistentry>
+ <varlistentry><term>scannedonly:hide_nonscanned_files = True</term>
+ <listitem>
+ <para>
+ If false, all non-scanned files are visible in directory listings.
+ If such files are found in a directory listing the scanning daemon
+ is notified that scanning is required. Access to non-scanned files
+ is still denied (see scannedonly:allow_nonscanned_files).
+ </para>
+ </listitem>
+ </varlistentry>
+ <varlistentry><term>scannedonly:scanning_message = is being scanned for
+ viruses</term>
+ <listitem>
+ <para>
+ If non-scanned files are hidden
+ (if scannedonly:hide_nonscanned_files = True), a fake 0 byte file
+ is shown. The filename is the original filename with the message
+ as suffix.
+ </para>
+ </listitem>
+ </varlistentry>
+ <varlistentry><term>scannedonly:recheck_time_open = 50</term>
+ <listitem>
+ <para>
+ If a non-scanned file is opened, the vfs module will wait
+ recheck_tries_open times for recheck_time_open milliseconds for
+ the scanning daemon to create a <filename>.scanned:</filename>
+ file. For small files that are scanned by the daemon within the
+ time (tries * time) the behavior will be just like on-access
+ scanning.
+ </para>
+ </listitem>
+ </varlistentry>
+ <varlistentry><term>scannedonly:recheck_tries_open = 100</term>
+ <listitem>
+ <para>
+ See recheck_time_open.
+ </para>
+ </listitem>
+ </varlistentry>
+ <varlistentry><term>scannedonly:recheck_time_readdir = 50</term>
+ <listitem>
+ <para>
+ If a non-scanned file is in a directory listing the vfs module
+ notifies the daemon (once for all files that need scanning in
+ that directory), and waits recheck_tries_readdir times for
+ recheck_time_readdir milliseconds. Only used when
+ hide_nonscanned_files is false.
+ </para>
+ </listitem>
+ </varlistentry>
+ <varlistentry><term>scannedonly:recheck_tries_readdir = 20</term>
+ <listitem>
+ <para>
+ See recheck_time_readdir.
+ </para>
+ </listitem>
+ </varlistentry>
+ <varlistentry><term>scannedonly:allow_nonscanned_files = False</term>
+ <listitem>
+ <para>
+ Allow access to non-scanned files. The daemon is notified,
+ however, and special files such as <filename>.scanned:</filename>
+ files. <filename>.virus:</filename> files and
+ <filename>.failed:</filename> files are not listed.
+ </para>
+ </listitem>
+ </varlistentry>
+
+ </variablelist>
+</refsect1>
+
+<refsect1>
+ <title>EXAMPLES</title>
+
+ <para>Enable anti-virus scanning:</para>
+<programlisting>
+ <smbconfsection name="[homes]"/>
+ <smbconfoption name="vfs objects">scannedonly</smbconfoption>
+ <smbconfoption name="scannedonly:hide_nonscanned_files">False</smbconfoption>
+</programlisting>
+
+</refsect1>
+
+<refsect1>
+ <title>CAVEATS</title>
+
+ <para>This is not true on-access scanning. However, it is very fast
+ for files that have been scanned already.
+ </para>
+</refsect1>
+
+<refsect1>
+ <title>VERSION</title>
+
+ <para>This man page is correct for version 3.6.0 of the Samba suite.
+ </para>
+</refsect1>
+
+<refsect1>
+ <title>AUTHOR</title>
+
+ <para>The original Samba software and related utilities
+ were created by Andrew Tridgell. Scannedonly was
+ developed for Samba by Olivier Sessink. Samba is now developed
+ by the Samba Team as an Open Source project similar
+ to the way the Linux kernel is developed.</para>
+
+</refsect1>
+
+</refentry>