Fix Bug 8152 - smbd crash in release_ip()

[Samba.git] / docs-xml / Samba3-HOWTO / TOSHARG-Compiling.xml

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<!DOCTYPE chapter PUBLIC "-//Samba-Team//DTD DocBook V4.2-Based Variant V1.0//EN" "http://www.samba.org/samba/DTD/samba-doc">
<chapter id="compiling">
<chapterinfo>
        &author.jelmer;
        &author.jht;
        &author.tridge;
        
        <pubdate> 22 May 2001 </pubdate>
        <pubdate> 18 March 2003 </pubdate>
        <pubdate> June 2005 </pubdate>
</chapterinfo>

<title>How to Compile Samba</title>

<para>
You can obtain the Samba source file from the
<ulink url="http://samba.org/">Samba Web site</ulink>. To obtain a development version, 
you can download Samba from Subversion or using <command>rsync</command>.
</para>

<sect1>
<title>Access Samba Source Code via Subversion</title>


<sect2>
<title>Introduction</title>

<para>
<indexterm><primary>Subversion</primary></indexterm>
Samba is developed in an open environment. Developers use a
Subversion to <quote>checkin</quote> (also known as 
<quote>commit</quote>) new source code. Samba's various Subversion branches can
be accessed via anonymous Subversion using the instructions
detailed in this chapter.
</para>

<para>
This chapter is a modified version of the instructions found at the
<ulink noescape="1" url="http://samba.org/samba/subversion.html">Samba</ulink> Web site.
</para>

</sect2>

<sect2>
<title>Subversion Access to samba.org</title>

<para>
The machine samba.org runs a publicly accessible Subversion
repository for access to the source code of several packages, 
including Samba, rsync, distcc, ccache, and jitterbug. There are two main ways
of accessing the Subversion server on this host.
</para>

<sect3>
<title>Access via ViewCVS</title>


<para>
<indexterm><primary>SVN</primary><secondary>web</secondary></indexterm>
You can access the source code via your favorite WWW browser. This allows you to access
the contents of individual files in the repository and also to look at the revision 
history and commit logs of individual files. You can also ask for a diff 
listing between any two versions on the repository.
</para>

<para>
Use the URL
<ulink noescape="1" url="http://viewcvs.samba.org/">http://viewcvs.samba.org/</ulink>.
</para>
</sect3>

<sect3>
<title>Access via Subversion</title>

<para>
<indexterm><primary>Subversion</primary></indexterm>
You can also access the source code via a normal Subversion client. This gives you much more control over what
you can do with the repository and allows you to check out whole source trees and keep them up to date via
normal Subversion commands. This is the preferred method of access if you are a developer and not just a
casual browser.
</para>

<para>In order to be able to download the Samba sources off Subversion, you need 
a Subversion client. Your distribution might include one, or you can download the 
sources from <ulink noescape="1" url="http://subversion.tigris.org/">http://subversion.tigris.org/</ulink>.
</para>

<para>
To gain access via anonymous Subversion, use the following steps. 
</para>

<procedure>
        <title>Retrieving Samba using Subversion</title>

        <step>
        <para>
        Install a recent copy of Subversion. All you really need is a 
        copy of the Subversion client binary. 
        </para>
        </step>

        <step>
        <para>
        Run the command 
        <screen>
        <userinput>svn co svn://svnanon.samba.org/samba/trunk samba</userinput>.
        </screen>
        </para>
        
        <para>
        This will create a directory called <filename>samba</filename> containing the 
        latest Samba source code (usually the branch that is going to be the next major release). This 
        currently corresponds to the 3.1 development tree. 
        </para>
        
        <para>
        Subversion branches other then trunk can be obtained by adding branches/BRANCH_NAME to the URL you check
        out. A list of branch names can be found on the <quote>Development</quote> page of the Samba Web site. A
        common request is to obtain the latest 3.0 release code. This could be done by using the following command:
        <screen>
        <userinput>svn co svn://svnanon.samba.org/samba/branches/SAMBA_3_0 samba_3</userinput>.
        </screen>
        </para>
        </step>

        <step>
        <para>
        Whenever you want to merge in the latest code changes, use the following command from within the Samba
        directory:
        <screen>
        <userinput>svn update</userinput>
        </screen>
        </para>
        </step>
</procedure>
        
</sect3>
</sect2>

</sect1>

<sect1>
        <title>Accessing the Samba Sources via rsync and ftp</title>


        <para>
        <indexterm><primary>rsync</primary></indexterm>
        <indexterm><primary>ftp</primary></indexterm>
        <parameter>pserver.samba.org</parameter> also exports unpacked copies of most parts of the Subversion tree
        at the Samba <ulink noescape="1" url="ftp://pserver.samba.org/pub/unpacked">pserver</ulink> location and also
        via anonymous rsync at the Samba <ulink noescape="1"
        url="rsync://pserver.samba.org/ftp/unpacked/">rsync</ulink> server location.  I recommend using rsync rather
        than ftp, because rsync is capable of compressing data streams, but it is also more useful than FTP because
        during a partial update it will transfer only the data that is missing plus a small overhead.  See <ulink
        noescape="1" url="http://rsync.samba.org/">the rsync home page</ulink> for more info on rsync.
        </para>

        <para>
        The disadvantage of the unpacked trees is that they do not support automatic
        merging of local changes as Subversion does. <command>rsync</command> access is most convenient 
        for an initial install.                      
        </para>
</sect1>

<sect1>
<title>Verifying Samba's PGP Signature</title>

<para>
<indexterm><primary>GPG</primary></indexterm>
<indexterm><primary>PGP</primary></indexterm>
It is strongly recommended that you verify the PGP signature for any source file before
installing it. Even if you're not downloading from a mirror site, verifying PGP signatures
should be a standard reflex. Many people today use the GNU GPG tool set in place of PGP.
GPG can substitute for PGP.
</para>


<para>
With that said, go ahead and download the following files:
</para>

<para><screen>
&prompt;<userinput>wget http://us1.samba.org/samba/ftp/samba-3.0.20.tar.asc</userinput>
&prompt;<userinput>wget http://us1.samba.org/samba/ftp/samba-pubkey.asc</userinput>
</screen></para>


<para>
<indexterm><primary>PGP</primary></indexterm>
The first file is the PGP signature for the Samba source file; the other is the Samba public
PGP key itself. Import the public PGP key with:
<screen>
&prompt;<userinput>gpg --import samba-pubkey.asc</userinput>
</screen>
and verify the Samba source code integrity with:
<screen>
&prompt;<userinput>gzip -d samba-3.0.20.tar.gz</userinput>
&prompt;<userinput>gpg --verify samba-3.0.20.tar.asc</userinput>
</screen>
</para>

<para>
If you receive a message like, <quote>Good signature from Samba Distribution Verification Key...,</quote>
then all is well. The warnings about trust relationships can be ignored. An
example of what you would not want to see would be:
<screen>
gpg: BAD signature from <quote>Samba Distribution Verification Key</quote>
</screen>
</para>

</sect1>

<sect1>
        <title>Building the Binaries</title>
        
        <para>
        <indexterm><primary>autogen.sh</primary></indexterm>
<indexterm><primary>configure</primary></indexterm>
        After the source tarball has been unpacked, the next step involves
        configuration to match Samba to your operating system platform.
        If your source directory does not contain the <command>configure</command> script,
        it is necessary to build it before you can continue. Building of
        the configure script requires the correct version of the autoconf
        tool kit. Where the necessary version of autoconf is present,
        the configure script can be generated by executing the following
        (please note that in Samba 3.4.x, the directory is called source3 instead
        of source):
<screen>
&rootprompt; cd samba-3.0.20/source
&rootprompt; ./autogen.sh
</screen>
        </para>
        

        <para>
        <indexterm><primary>configure</primary></indexterm>
        To build the binaries, run the program <userinput>./configure
        </userinput> in the source directory. This should automatically 
        configure Samba for your operating system. If you have unusual 
        needs, then you may wish to first run:
<screen>
&rootprompt;<userinput>./configure --help</userinput>
</screen>
</para>
        
        <para>
        This will help you to see what special options can be enabled. Now execute
        <userinput>./configure</userinput> with any arguments it might need:
<screen>
&rootprompt;<userinput>./configure <replaceable>[... arguments ...]</replaceable></userinput>
</screen>
        </para>
        
        <para>
        <indexterm><primary>make</primary></indexterm>
        Execute the following create the binaries:
<screen>
&rootprompt; <userinput>make</userinput>
</screen>
        Once it is successfully compiled, you can execute the command shown here to
        install the binaries and manual pages:
<screen>
&rootprompt; <userinput>make install</userinput>
</screen>
        </para>
        
        <para>
        Some people prefer to install binary files and man pages separately. If this is
        your wish, the binary files can be installed by executing:
<screen>
&rootprompt; <userinput>make installbin</userinput>
</screen>
        The man pages can be installed using this command:
<screen>
&rootprompt; <userinput>make installman</userinput>
</screen>
        </para>

        <para>
        Note that if you are upgrading from a previous version of Samba the old
        versions of the binaries will be renamed with an <quote>.old</quote> extension.
        You can go back to the previous version by executing:
<screen>
&rootprompt; <userinput>make revert</userinput>
</screen>
        As you can see from this, building and installing Samba does not need to
        result in disaster!
        </para>
        

        <sect2>
        <title>Compiling Samba with Active Directory Support</title>
        
        <para>
        In order to compile Samba with ADS support, you need to have installed
        on your system:
        </para>

        <itemizedlist>
        
            <listitem><para>
                The MIT or Heimdal Kerberos development libraries
            (either install from the sources or use a package).
                </para></listitem>
        
            <listitem><para>
                The OpenLDAP development libraries.
                </para></listitem>
            
        </itemizedlist>

        <para>
        If your Kerberos libraries are in a nonstandard location, then
        remember to add the configure option
        <option>--with-krb5=<replaceable>DIR</replaceable></option>.
        </para>

        <para>
        After you run configure, make sure that the 
        <filename>include/config.h</filename> it generates contain lines like this:
<programlisting>
#define HAVE_KRB5 1
#define HAVE_LDAP 1
</programlisting>
        </para>

        <para>
        If it does not, configure did not find your KRB5 libraries or
        your LDAP libraries. Look in <filename>config.log</filename> to figure
        out why and fix it.
        </para>

        <sect3>
        <title>Installing the Required Packages for Debian</title>

        <para>On Debian, you need to install the following packages:</para>
        <para>
                <itemizedlist>
                        <listitem><para>libkrb5-dev</para></listitem>
                        <listitem><para>krb5-user</para></listitem>
                </itemizedlist>
        </para>
        </sect3>

        <sect3>
        <title>Installing the Required Packages for Red Hat Linux</title>

        <para>On Red Hat Linux, this means you should have at least: </para>
        <para>
                <itemizedlist>
                        <listitem><para>krb5-workstation (for kinit)</para></listitem>
                        <listitem><para>krb5-libs (for linking with)</para></listitem>
                        <listitem><para>krb5-devel (because you are compiling from source)</para></listitem>
                </itemizedlist>
        </para>

        <para>in addition to the standard development environment.</para>

        <para>If these files are not installed on your system, you should check the installation
        CDs to find which has them and install the files using your tool of choice. If in doubt
        about what tool to use, refer to the Red Hat Linux documentation.</para>

        </sect3>

        <sect3>
        <title>SuSE Linux Package Requirements</title>

        <para>
        SuSE Linux installs Heimdal packages that may be required to allow you to build
        binary packages. You should verify that the development libraries have been installed on
        your system.
        </para>

        <para>
        SuSE Linux Samba RPMs support Kerberos. Please refer to the documentation for
        your SuSE Linux system for information regarding SuSE Linux specific configuration.
        Additionally, SuSE is very active in the maintenance of Samba packages that provide
        the maximum capabilities that are available. You should consider using SuSE-provided
        packages where they are available.
        </para>

        </sect3>
        
        </sect2>
                          
</sect1>

<sect1 id="startingSamba">
        <title>Starting the &smbd; &nmbd; and &winbindd;</title>


        <para>
        <indexterm><primary>inetd</primary></indexterm>
        You must choose to start &smbd;, &winbindd;  and &nmbd; either as daemons or from
        <application>inetd</application>. Don't try to do both!  Either you can put
        them in <filename> inetd.conf</filename> and have them started on demand by
        <application>inetd</application> or <application>xinetd</application>, or you
        can start them as daemons either from the command-line or in
        <filename>/etc/rc.local</filename>. See the man pages for details on the
        command line options. Take particular care to read the bit about what user
        you need to have to start Samba. In many cases, you must be root.
        </para>

        <para>
        The main advantage of starting &smbd; and &nmbd; using the recommended daemon method
        is that they will respond slightly more quickly to an initial connection request.
        </para>

        <sect2>
        <title>Starting from inetd.conf</title>

        <indexterm><primary>inetd</primary></indexterm>
        
        <note>
        <para>The following will be different if 
        you use NIS, NIS+, or LDAP to distribute services maps.</para>
        </note>
        
        <para>Look at your <filename>/etc/services</filename>. 
        What is defined at port 139/tcp? If nothing is defined, 
        then add a line like this:</para>

        <para><programlisting>netbios-ssn     139/tcp</programlisting></para>

        <para>Similarly for 137/udp, you should have an entry like:</para>

        <para><programlisting>netbios-ns        137/udp</programlisting></para>

        <para>
        Next, edit your <filename>/etc/inetd.conf</filename> and add two lines like this:
<programlisting>
netbios-ssn stream tcp nowait root /usr/local/samba/sbin/smbd smbd 
netbios-ns dgram udp wait root /usr/local/samba/sbin/nmbd nmbd 
</programlisting>
        </para>

<indexterm><primary>/etc/inetd.conf</primary></indexterm>
        <para>
        The exact syntax of <filename>/etc/inetd.conf</filename> 
        varies between UNIXes. Look at the other entries in inetd.conf 
        for a guide.
        </para>

        <para>
        <indexterm><primary>xinetd</primary></indexterm>
        Some distributions use xinetd instead of inetd. Consult the 
        xinetd manual for configuration information.
        </para>

        <note><para>Some UNIXes already have entries like netbios_ns 
        (note the underscore) in <filename>/etc/services</filename>. 
        You must edit <filename>/etc/services</filename> or
        <filename>/etc/inetd.conf</filename> to make them consistent.
        </para></note>

        <note><para>
        <indexterm><primary>ifconfig</primary></indexterm>
        On many systems you may need to use the
        <smbconfoption name="interfaces"/> option in &smb.conf; to specify
        the IP address and netmask of your interfaces. Run 
        <application>ifconfig</application> as root if you do
        not know what the broadcast is for your net. &nmbd; tries
        to determine it at runtime, but fails on some UNIXes. 
        </para></note>

        <warning><para>
        Many UNIXes only accept around five parameters on the command
        line in <filename>inetd.conf</filename>.  This means you shouldn't
        use spaces between the options and arguments, or you should use
        a script and start the script from <command>inetd</command>.
        </para></warning>

        <para>
        Restart <application>inetd</application>, perhaps just send it a HUP,
        like this:
<indexterm><primary>killall</primary></indexterm>
<screen>
&rootprompt;<userinput>killall -HUP inetd</userinput>
</screen>
        </para>
                
        </sect2>
        
        <sect2>
        <title>Alternative: Starting &smbd; as a Daemon</title>
                
        <para>
        <indexterm><primary>daemon</primary></indexterm>
<indexterm><primary>startsmb</primary></indexterm>
        To start the server as a daemon, you should create a script something
        like this one, perhaps calling it <filename>startsmb</filename>.
        </para>

<para><programlisting>
#!/bin/sh
/usr/local/samba/sbin/smbd -D
/usr/local/samba/sbin/winbindd -D
/usr/local/samba/sbin/nmbd -D
</programlisting></para>

        <para>
        Make it executable with <command>chmod +x startsmb</command>.
        </para>

        <para>
        You can then run <command>startsmb</command> by hand or execute
        it from <filename>/etc/rc.local</filename>.
        </para>

        <para>
        To kill it, send a kill signal to the processes &nmbd; and &smbd;.
        </para>

        <note><para>
        If you use the SVR4-style init system, you may like to look at the
        <filename>examples/svr4-startup</filename> script to make Samba fit
        into that system.
        </para></note>

        <sect3>
        <title>Starting Samba for Red Hat Linux</title>

        <para>
        Red Hat Linux has not always included all Samba components in the standard installation.
        So versions of Red Hat Linux do not install the winbind utility, even though it is present
        on the installation CDROM media. Check to see if the <command>winbindd</command> is present
        on the system:
<screen>
&rootprompt; ls /usr/sbin/winbindd
/usr/sbin/winbindd
</screen>
        This means that the appropriate RPM package was installed. The following response means
        that it is not installed:
<screen>
/bin/ls: /usr/sbin/winbind: No such file or directory
</screen>
        In this case, it should be installed if you intend to use <command>winbindd</command>. Search
        the CDROM installation media for the samba-winbind RPM and install it following Red Hat
        guidelines.
        </para>

        <para>
        The process for starting Samba will now be outlined. Be sure to configure Samba's &smb.conf;
        file before starting Samba. When configured, start Samba by executing:
<screen>
&rootprompt; service smb start
&rootprompt; service winbind start
</screen>
        These steps will start &nmbd;, &smbd; and &winbindd;.
        </para>

        <para>
        To ensure that these services will be automatically restarted when the system is rebooted
        execute:
<screen>
&rootprompt; chkconfig smb on
&rootprompt; chkconfig winbind on
</screen>
        Samba will be started automatically at every system reboot.
        </para>

        </sect3>

        <sect3>
        <title>Starting Samba for Novell SUSE Linux</title>

        <para>
        Novell SUSE Linux products automatically install all essential Samba components in a default installation.
        Configure your &smb.conf; file, then execute the following to start Samba:
<screen>
&rootprompt; rcnmb start
&rootprompt; rcsmb start
&rootprompt; rcwinbind start
</screen>
        Now execute these commands so that Samba will be started automatically following a system
        reboot:
<screen>
&rootprompt; chkconfig nmb on
&rootprompt; chkconfig smb on
&rootprompt; chkconfig winbind on
</screen>
        The Samba services will now be started automatically following a system reboot.
        </para>

        </sect3>

        </sect2>

</sect1>

</chapter>