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The FreeBSD Documentation Project
$FreeBSD$
-->
<chapter id="cutting-edge">
<title>The Cutting Edge: FreeBSD-current and FreeBSD-stable</title>
<para>FreeBSD is under constant development between releases. For people
who want to be on the cutting edge, there are several easy mechanisms for
keeping your system in sync with the latest developments. Be warned: the
cutting edge is not for everyone! This chapter will help you decide if you
want to track the development system, or stick with one of the released
versions.</para>
<sect1 id="current">
<title>Staying Current with FreeBSD</title>
<para><emphasis>Contributed by &a.jkh;.</emphasis></para>
<sect2>
<title>What is FreeBSD-current?</title>
<para>FreeBSD-current is, quite literally, nothing more than a daily
snapshot of the working sources for FreeBSD. These include work in
progress, experimental changes and transitional mechanisms that may or
may not be present in the next official release of the software.
While many of us compile almost daily from FreeBSD-current sources,
there are periods of time when the sources are literally
un-compilable. These problems are generally resolved as expeditiously
as possible, but whether or not FreeBSD-current sources bring disaster
or greatly desired functionality can literally be a matter of which
part of any given 24 hour period you grabbed them in!</para>
</sect2>
<sect2>
<title>Who needs FreeBSD-current?</title>
<para>FreeBSD-current is made generally available for 3 primary interest
groups:</para>
<orderedlist>
<listitem>
<para>Members of the FreeBSD group who are actively working on some
part of the source tree and for whom keeping &ldquo;current&rdquo;
is an absolute requirement.</para>
</listitem>
<listitem>
<para>Members of the FreeBSD group who are active testers, willing
to spend time working through problems in order to ensure that
FreeBSD-current remains as sane as possible. These are also people
who wish to make topical suggestions on changes and the general
direction of FreeBSD.</para>
</listitem>
<listitem>
<para>Peripheral members of the FreeBSD (or some other) group who
merely wish to keep an eye on things and use the current sources
for reference purposes (e.g. for <emphasis>reading</emphasis>, not
running). These people also make the occasional comment or
contribute code.</para>
</listitem>
</orderedlist>
</sect2>
<sect2>
<title>What is FreeBSD-current <emphasis>not</emphasis>?</title>
<orderedlist>
<listitem>
<para>A fast-track to getting pre-release bits because you heard
there is some cool new feature in there and you want to be the
first on your block to have it.</para>
</listitem>
<listitem>
<para>A quick way of getting bug fixes.</para>
</listitem>
<listitem>
<para>In any way &ldquo;officially supported&rdquo; by us. We do
our best to help people genuinely in one of the 3
&ldquo;legitimate&rdquo; FreeBSD-current categories, but we simply
<emphasis>do not have the time</emphasis> to provide tech support
for it. This is not because we are mean and nasty people who do
not like helping people out (we would not even be doing FreeBSD if
we were), it is literally because we cannot answer 400 messages a
day <emphasis>and</emphasis> actually work on FreeBSD! I am sure
that, if given the choice between having us answer lots of
questions or continuing to improve FreeBSD, most of you would vote
for us improving it.</para>
</listitem>
</orderedlist>
</sect2>
<sect2>
<title>Using FreeBSD-current</title>
<orderedlist>
<listitem>
<para>Join the &a.current; and the &a.cvsall; . This is not just a
good idea, it is <emphasis>essential</emphasis>. If you are not
on the <emphasis>FreeBSD-current</emphasis> mailing list, you will
not see the comments that people are making about the current
state of the system and thus will probably end up stumbling over a
lot of problems that others have already found and solved. Even
more importantly, you will miss out on important bulletins which
may be critical to your system's continued health.</para>
<para>The <email>cvs-all</email> mailing list will allow you to see
the commit log entry for each change as it is made along with any
pertinent information on possible side-effects.</para>
<para>To join these lists, send mail to
&a.majordomo; and specify:
<programlisting>
subscribe freebsd-current
subscribe cvs-all</programlisting>
in the body of your message. Optionally, you can also say
<literal>help</literal> and Majordomo will send you full help on
how to subscribe and unsubscribe to the various other mailing
lists we support.</para>
</listitem>
<listitem>
<para>Grab the sources from <hostid
role="fqdn">ftp.FreeBSD.org</hostid>. You can do this in three
ways:</para>
<orderedlist>
<listitem>
<para>Use the <application><link
linkend="ctm">CTM</link></application> facility. Unless
you have a good TCP/IP connection at a flat rate, this is
the way to do it.</para>
</listitem>
<listitem>
<para>Use the <link linkend="cvsup">cvsup</link> program with
<ulink
url="ftp://ftp.FreeBSD.org/pub/FreeBSD/FreeBSD-current/src/share/examples/cvsup/standard-supfile">this
supfile</ulink>. This is the second most recommended
method, since it allows you to grab the entire collection
once and then only what has changed from then on. Many people
run cvsup from cron and keep their sources up-to-date
automatically. For a fairly easy interface to this, simply
type:</para>
<blockquote><screen>&prompt.root; <userinput>pkg_add -f \
ftp://ftp.FreeBSD.org/pub/FreeBSD/development/CVSup/cvsupit.tgz</userinput></screen></blockquote>
</listitem>
<listitem>
<para>Use <command>ftp</command>. The source tree for
FreeBSD-current is always &ldquo;exported&rdquo; on: <ulink
url="ftp://ftp.FreeBSD.org/pub/FreeBSD/FreeBSD-current/">ftp://ftp.FreeBSD.org/pub/FreeBSD/FreeBSD-current/</ulink>.
We also use <command>wu-ftpd</command> which allows
compressed/tar'd grabbing of whole trees. e.g. you
see:</para>
<screen>usr.bin/lex</screen>
<para>You can do:
<screen><prompt>ftp&gt;</prompt> <userinput>cd usr.bin</userinput>
<prompt>ftp&gt;</prompt> <userinput>get lex.tar.Z</userinput></screen>
and it will get the whole directory for you as a compressed
tar file.</para>
</listitem>
</orderedlist>
</listitem>
<listitem>
<para>Essentially, if you need rapid on-demand access to the source
and communications bandwidth is not a consideration, use
<command>cvsup</command> or <command>ftp</command>. Otherwise,
use <application>CTM</application>.</para>
<para>If you are grabbing the sources to run, and not just look at,
then grab <emphasis>all</emphasis> of current, not just selected
portions. The reason for this is that various parts of the source
depend on updates elsewhere, and trying to compile just a subset
is almost guaranteed to get you into trouble.</para>
<para>Before compiling current, read the Makefile in
<filename>/usr/src</filename> carefully. You should at least run
a <link linkend="makeworld">make world</link> the first time
through as part of the upgrading process. Reading the &a.current;
will keep you up-to-date on other bootstrapping procedures that
sometimes become necessary as we move towards the next
release.</para>
</listitem>
<listitem>
<para>Be active! If you are running FreeBSD-current, we want to
know what you have to say about it, especially if you have
suggestions for enhancements or bug fixes. Suggestions with
accompanying code are received most enthusiastically!</para>
</listitem>
</orderedlist>
</sect2>
</sect1>
<sect1 id="stable">
<title>Staying Stable with FreeBSD</title>
<para><emphasis>Contributed by &a.jkh;.</emphasis></para>
<sect2>
<title>What is FreeBSD-stable?</title>
<para>FreeBSD-stable is our development branch for a more low-key and
conservative set of changes intended for our next mainstream release.
Changes of an experimental or untested nature do not go into this
branch (see <link linkend="current">FreeBSD-current</link>).</para>
</sect2>
<sect2>
<title>Who needs FreeBSD-stable?</title>
<para>If you are a commercial user or someone who puts maximum stability
of their FreeBSD system before all other concerns, you should consider
tracking <emphasis>stable</emphasis>. This is especially true if you
have installed the most recent release (<ulink
url="ftp://ftp.FreeBSD.org/pub/FreeBSD/&rel.current;-RELEASE/">&rel.current;-RELEASE</ulink>
at the time of this writing) since the <emphasis>stable</emphasis>
branch is effectively a bug-fix stream relative to the previous
release.</para>
<warning>
<para>The <emphasis>stable</emphasis> tree endeavors, above all, to be
fully compilable and stable at all times, but we do occasionally
make mistakes (these are still active sources with
quickly-transmitted updates, after all). We also do our best to
thoroughly test fixes in <emphasis>current</emphasis> before
bringing them into <emphasis>stable</emphasis>, but sometimes our
tests fail to catch every case. If something breaks for you in
<emphasis>stable</emphasis>, please let us know
<emphasis>immediately!</emphasis> (see next section).</para>
</warning>
</sect2>
<sect2>
<title>Using FreeBSD-stable</title>
<orderedlist>
<listitem>
<para>Join the &a.stable;. This will keep you informed of
build-dependencies that may appear in <emphasis>stable</emphasis>
or any other issues requiring special attention. Developers will
also make announcements in this mailing list when they are
contemplating some controversial fix or update, giving the users a
chance to respond if they have any issues to raise concerning the
proposed change.</para>
<para>The <email>cvs-all</email> mailing list will allow you to see
the commit log entry for each change as it is made along with any
pertinent information on possible side-effects.</para>
<para>To join these lists, send mail to &a.majordomo; and specify:
<programlisting>
subscribe freebsd-stable
subscribe cvs-all</programlisting>
in the body of your message. Optionally, you can also say
<literal>help</literal> and Majordomo will send you full help on
how to subscribe and unsubscribe to the various other mailing
lists we support.</para>
</listitem>
<listitem>
<para>If you are installing a new system and want it to be as stable
as possible, you can simply grab the latest dated branch snapshot
from <ulink
url="ftp://releng3.FreeBSD.org/pub/FreeBSD/">ftp://releng3.FreeBSD.org/pub/FreeBSD/</ulink>
and install it like any other release.</para>
<para>If you are already running a previous release of 2.2 and wish
to upgrade via sources then you can easily do so from <hostid
role="fqdn">ftp.FreeBSD.org</hostid>. This can be done in one
of three ways:</para>
<orderedlist>
<listitem>
<para>Use the <application><link
linkend="ctm">CTM</link></application> facility. Unless
you have a good TCP/IP connection at a flat rate, this is
the way to do it.</para>
</listitem>
<listitem>
<para>Use the <link linkend="cvsup">cvsup</link> program with
<ulink
url="ftp://ftp.FreeBSD.org/pub/FreeBSD/FreeBSD-current/src/share/examples/cvsup/stable-supfile">this
supfile</ulink>. This is the second most recommended
method, since it allows you to grab the entire collection
once and then only what has changed from then on. Many people
run cvsup from cron to keep their sources up-to-date
automatically. For a fairly easy interface to this, simply
type;</para>
<blockquote><screen>&prompt.root; <userinput>pkg_add -f \
ftp://ftp.FreeBSD.org/pub/FreeBSD/development/CVSup/cvsupit.tgz</userinput></screen></blockquote>
</listitem>
<listitem>
<para>Use <command>ftp</command>. The source tree for
FreeBSD-stable is always &ldquo;exported&rdquo; on: <ulink
url="ftp://ftp.FreeBSD.org/pub/FreeBSD/FreeBSD-stable/">ftp://ftp.FreeBSD.org/pub/FreeBSD/FreeBSD-stable/</ulink></para>
<para>We also use <command>wu-ftpd</command> which allows
compressed/tar'd grabbing of whole trees. e.g. you
see:</para>
<screen>usr.bin/lex</screen>
<para>You can do:
<screen><prompt>ftp&gt;</prompt> <userinput>cd usr.bin</userinput>
<prompt>ftp&gt;</prompt> <userinput>get lex.tar.Z</userinput></screen>
and it will get the whole directory for you as a compressed
tar file.</para>
</listitem>
</orderedlist>
</listitem>
<listitem>
<para>Essentially, if you need rapid on-demand access to the source
and communications bandwidth is not a consideration, use
<command>cvsup</command> or <command>ftp</command>. Otherwise,
use <application>CTM</application>.</para>
</listitem>
<listitem>
<para>Before compiling stable, read the Makefile in
<filename>/usr/src</filename> carefully. You should at least run
a <link linkend="makeworld">make world</link> the first time
through as part of the upgrading process. Reading the &a.stable;
will keep you up-to-date on other bootstrapping procedures that
sometimes become necessary as we move towards the next
release.</para>
</listitem>
</orderedlist>
</sect2>
</sect1>
<sect1 id="synching">
<title>Synchronizing Source Trees over the Internet</title>
<para><emphasis>Contributed by &a.jkh;.</emphasis></para>
<para>There are various ways of using an Internet (or email) connection to
stay up-to-date with any given area of the FreeBSD project sources, or
all areas, depending on what interests you. The primary services we
offer are <link linkend="anoncvs">Anonymous CVS</link>, <link
linkend="cvsup">CVSup</link>, and <link
linkend="ctm">CTM</link>.</para>
<para><application>Anonymous CVS</application> and
<application>CVSup</application> use the <emphasis>pull</emphasis> model
of updating sources. In the case of <application>CVSup</application>
the user (or a cron script) invokes the <command>cvsup</command>
program, and it interacts with a <command>cvsupd</command> server
somewhere to bring your files up to date. The updates you receive are
up-to-the-minute and you get them when, and only when, you want them.
You can easily restrict your updates to the specific files or
directories that are of interest to you. Updates are generated on the
fly by the server, according to what you have and what you want to have.
<application>Anonymous CVS</application> is quite a bit more simplistic
than CVSup in that it's just an extension to
<application>CVS</application> which allows it to pull changes directly
from a remote CVS repository. <application>CVSup</application> can do
this far more efficiently, but <application>Anonymous CVS</application>
is easier to use.</para>
<para><application>CTM</application>, on the other hand, does not
interactively compare the sources you have with those on the master
archive or otherwise pull them across.. Instead, a script which
identifies changes in files since its previous run is executed several
times a day on the master CTM machine, any detected changes being
compressed, stamped with a sequence-number and encoded for transmission
over email (in printable ASCII only). Once received, these &ldquo;CTM
deltas&rdquo; can then be handed to the &man.ctm.rmail.1; utility which
will automatically decode,
verify and apply the changes to the user's copy of the sources. This
process is far more efficient than <application>CVSup</application>, and
places less strain on our server resources since it is a
<emphasis>push</emphasis> rather than a <emphasis>pull</emphasis>
model.</para>
<para>There are other trade-offs, of course. If you inadvertently wipe
out portions of your archive, <application>CVSup</application> will
detect and rebuild the damaged portions for you.
<application>CTM</application> won't do this, and if you wipe some
portion of your source tree out (and don't have it backed up) then you
will have to start from scratch (from the most recent CVS &ldquo;base
delta&rdquo;) and rebuild it all with CTM or, with anoncvs, simply
delete the bad bits and resync.</para>
<para>For more information on <application>Anonymous CVS</application>,
<application>CTM</application>, and <application>CVSup</application>,
please see one of the following sections:</para>
<sect2 id="anoncvs">
<title>Anonymous CVS</title>
<para><emphasis>Contributed by &a.jkh;</emphasis></para>
<sect3>
<title><anchor id="anoncvs-intro">Introduction</title>
<para>Anonymous CVS (or, as it is otherwise known,
<emphasis>anoncvs</emphasis>) is a feature provided by the CVS
utilities bundled with FreeBSD for synchronizing with a remote CVS
repository. Among other things, it allows users of FreeBSD to
perform, with no special privileges, read-only CVS operations
against one of the FreeBSD project's official anoncvs servers. To
use it, one simply sets the <envar>CVSROOT</envar> environment
variable to point at the appropriate anoncvs server and then uses
the &man.cvs.1; command to access it like any local
repository.</para>
<para>While it can also be said that the <link
linkend="cvsup">CVSup</link> and <emphasis>anoncvs</emphasis>
services both perform essentially the same function, there are
various trade-offs which can influence the user's choice of
synchronization methods. In a nutshell,
<application>CVSup</application> is much more efficient in its usage
of network resources and is by far the most technically
sophisticated of the two, but at a price. To use
<application>CVSup</application>, a special client must first be
installed and configured before any bits can be grabbed, and then
only in the fairly large chunks which
<application>CVSup</application> calls
<emphasis>collections</emphasis>.</para>
<para><application>Anoncvs</application>, by contrast, can be used to
examine anything from an individual file to a specific program (like
<command>ls</command> or <command>grep</command>) by referencing the
CVS module name. Of course, <application>anoncvs</application> is
also only good for read-only operations on the CVS repository, so if
it's your intention to support local development in one repository
shared with the FreeBSD project bits then
<application>CVSup</application> is really your only option.</para>
</sect3>
<sect3>
<title><anchor id="anoncvs-usage">Using Anonymous CVS</title>
<para>Configuring &man.cvs.1; to use an Anonymous CVS repository is a
simple matter of setting the <envar>CVSROOT</envar> environment
variable to point to one of the FreeBSD project's
<emphasis>anoncvs</emphasis> servers. At the time of this writing,
the following servers are available:</para>
<itemizedlist>
<listitem>
<para><emphasis>USA</emphasis>:
anoncvs@anoncvs.FreeBSD.org:/cvs</para>
</listitem>
</itemizedlist>
<para>Since CVS allows one to &ldquo;check out&rdquo; virtually any
version of the FreeBSD sources that ever existed (or, in some cases,
will exist <!-- smiley -->:), you need to be familiar with the
revision (<option>-r</option>) flag to &man.cvs.1; and what some of
the permissible values for it in the FreeBSD Project repository
are.</para>
<para>There are two kinds of tags, revision tags and branch tags. A
revision tag refers to a specific revision. Its meaning stays the
same from day to day. A branch tag, on the other hand, refers to
the latest revision on a given line of development, at any given
time. Because a branch tag does not refer to a specific revision,
it may mean something different tomorrow than it means today.</para>
<para>Here are the branch tags that users might be interested
in:</para>
<variablelist>
<varlistentry>
<term>HEAD</term>
<listitem>
<para>Symbolic name for the main line, or FreeBSD-current. Also
the default when no revision is specified.</para>
</listitem>
</varlistentry>
<varlistentry>
<term>RELENG_3</term>
<listitem>
<para>The line of development for FreeBSD-3.x, also known as
FreeBSD-stable. Not valid for the ports collection.</para>
</listitem>
</varlistentry>
<varlistentry>
<term>RELENG_2_2</term>
<listitem>
<para>The line of development for FreeBSD-2.2.x, also known as
2.2-stable. This branch is mostly obsolete. Not valid for
the ports collection.</para>
</listitem>
</varlistentry>
<varlistentry>
<term>RELENG_2_1_0</term>
<listitem>
<para>The line of development for FreeBSD-2.1.x - this branch is
largely obsolete. Not valid for the ports collection.</para>
</listitem>
</varlistentry>
</variablelist>
<para>Here are the revision tags that users might be interested
in:</para>
<variablelist>
<varlistentry>
<term>RELENG_3_2_0_RELEASE</term>
<listitem>
<para>FreeBSD-3.2. Not valid for the ports collection.</para>
</listitem>
</varlistentry>
<varlistentry>
<term>RELENG_3_1_0_RELEASE</term>
<listitem>
<para>FreeBSD-3.1. Not valid for the ports collection.</para>
</listitem>
</varlistentry>
<varlistentry>
<term>RELENG_3_0_0_RELEASE</term>
<listitem>
<para>FreeBSD-3.0. Not valid for the ports collection.</para>
</listitem>
</varlistentry>
<varlistentry>
<term>RELENG_2_2_8_RELEASE</term>
<listitem>
<para>FreeBSD-2.2.8. Not valid for the ports collection.</para>
</listitem>
</varlistentry>
<varlistentry>
<term>RELENG_2_2_7_RELEASE</term>
<listitem>
<para>FreeBSD-2.2.7. Not valid for the ports collection.</para>
</listitem>
</varlistentry>
<varlistentry>
<term>RELENG_2_2_6_RELEASE</term>
<listitem>
<para>FreeBSD-2.2.6. Not valid for the ports collection.</para>
</listitem>
</varlistentry>
<varlistentry>
<term>RELENG_2_2_5_RELEASE</term>
<listitem>
<para>FreeBSD-2.2.5. Not valid for the ports collection.</para>
</listitem>
</varlistentry>
<varlistentry>
<term>RELENG_2_2_2_RELEASE</term>
<listitem>
<para>FreeBSD-2.2.2. Not valid for the ports collection.</para>
</listitem>
</varlistentry>
<varlistentry>
<term>RELENG_2_2_1_RELEASE</term>
<listitem>
<para>FreeBSD-2.2.1. Not valid for the ports collection.</para>
</listitem>
</varlistentry>
<varlistentry>
<term>RELENG_2_2_0_RELEASE</term>
<listitem>
<para>FreeBSD-2.2.0. Not valid for the ports collection.</para>
</listitem>
</varlistentry>
<varlistentry>
<term>RELENG_2_1_7_RELEASE</term>
<listitem>
<para>FreeBSD-2.1.7. Not valid for the ports collection.</para>
</listitem>
</varlistentry>
<varlistentry>
<term>RELENG_2_1_6_1_RELEASE</term>
<listitem>
<para>FreeBSD-2.1.6.1. Not valid for the ports
collection.</para>
</listitem>
</varlistentry>
<varlistentry>
<term>RELENG_2_1_6_RELEASE</term>
<listitem>
<para>FreeBSD-2.1.6. Not valid for the ports collection.</para>
</listitem>
</varlistentry>
<varlistentry>
<term>RELENG_2_1_5_RELEASE</term>
<listitem>
<para>FreeBSD-2.1.5. Not valid for the ports collection.</para>
</listitem>
</varlistentry>
<varlistentry>
<term>RELENG_2_1_0_RELEASE</term>
<listitem>
<para>FreeBSD-2.1.0. Not valid for the ports collection.</para>
</listitem>
</varlistentry>
</variablelist>
<para>When you specify a branch tag, you normally receive the latest
versions of the files on that line of development. If you wish to
receive some past version, you can do so by specifying a date with
the <option>-D date</option> flag. See the &man.cvs.1; man page
for more details.</para>
</sect3>
<sect3>
<title>Examples</title>
<para>While it really is recommended that you read the manual page for
&man.cvs.1; thoroughly before doing anything, here are some
quick examples which essentially show how to use Anonymous
CVS:</para>
<example>
<title>Checking out something from -current (&man.ls.1;) and
deleting it again:</title>
<screen>
&prompt.user; <userinput>setenv CVSROOT anoncvs@anoncvs.FreeBSD.org:/cvs</userinput>
&prompt.user; <userinput>cvs co ls</userinput>
&prompt.user; <userinput>cvs release -d ls</userinput></screen>
</example>
<example>
<title>Checking out the version of ls(1) in the 2.2-stable
branch:</title>
<screen>
&prompt.user; <userinput>setenv CVSROOT anoncvs@anoncvs.FreeBSD.org:/cvs</userinput>
&prompt.user; <userinput>cvs co -rRELENG_2_2 ls</userinput>
&prompt.user; <userinput>cvs release -d ls</userinput></screen>
</example>
<example>
<title>Creating a list of changes (as unidiffs) to &man.ls.1;</title>
<screen>
&prompt.user; <userinput>setenv CVSROOT anoncvs@anoncvs.FreeBSD.org:/cvs</userinput>
&prompt.user; <userinput>cvs rdiff -u -rRELENG_2_2_2_RELEASE -rRELENG_2_2_6_RELEASE ls</userinput></screen>
</example>
<example>
<title>Finding out what other module names can be used:</title>
<screen>
&prompt.user; <userinput>setenv CVSROOT anoncvs@anoncvs.FreeBSD.org:/cvs</userinput>
&prompt.user; <userinput>cvs co modules</userinput>
&prompt.user; <userinput>more modules/modules</userinput>
&prompt.user; <userinput>cvs release -d modules</userinput></screen>
</example>
</sect3>
<sect3>
<title>Other Resources</title>
<para>The following additional resources may be helpful in learning
CVS:</para>
<itemizedlist>
<listitem>
<para><ulink
url="http://www.csc.calpoly.edu/~dbutler/tutorials/winter96/cvs/">CVS Tutorial</ulink> from Cal Poly.</para>
</listitem>
<listitem>
<para><ulink url="http://www.cyclic.com/">Cyclic Software</ulink>,
commercial maintainers of CVS.</para>
</listitem>
<listitem>
<para><ulink
url="http://www.FreeBSD.org/cgi/cvsweb.cgi">CVSWeb</ulink> is
the FreeBSD Project web interface for CVS.</para>
</listitem>
</itemizedlist>
</sect3>
</sect2>
<sect2 id="ctm">
<title><application>CTM</application></title>
<para><emphasis>Contributed by &a.phk;. Updated
19-October-1997.</emphasis></para>
<para><application>CTM</application> is a method for keeping a remote
directory tree in sync with a central one. It has been developed for
usage with FreeBSD's source trees, though other people may find it
useful for other purposes as time goes by. Little, if any,
documentation currently exists at this time on the process of creating
deltas, so talk to &a.phk; for more information should you wish to use
<application>CTM</application> for other things.</para>
<sect3>
<title>Why should I use <application>CTM</application>?</title>
<para><application>CTM</application> will give you a local copy of the
FreeBSD source trees. There are a number of &ldquo;flavors&rdquo;
of the tree available. Whether you wish to track the entire cvs
tree or just one of the branches, <application>CTM</application> can
provide you the information. If you are an active developer on
FreeBSD, but have lousy or non-existent TCP/IP connectivity, or
simply wish to have the changes automatically sent to you,
<application>CTM</application> was made for you. You will need to
obtain up to three deltas per day for the most active branches.
However, you should consider having them sent by automatic email.
The sizes of the updates are always kept as small as possible. This
is typically less than 5K, with an occasional (one in ten) being
10-50K and every now and then a biggie of 100K+ or more coming
around.</para>
<para>You will also need to make yourself aware of the various caveats
related to working directly from the development sources rather than
a pre-packaged release. This is particularly true if you choose the
&ldquo;current&rdquo; sources. It is recommended that you read
<link linkend="current">Staying current with FreeBSD</link>.</para>
</sect3>
<sect3>
<title>What do I need to use <application>CTM</application>?</title>
<para>You will need two things: The <application>CTM</application>
program and the initial deltas to feed it (to get up to
&ldquo;current&rdquo; levels).</para>
<para>The <application>CTM</application> program has been part of
FreeBSD ever since version 2.0 was released, and lives in
<filename>/usr/src/usr.sbin/CTM</filename> if you have a copy of the
source online.</para>
<para>If you are running a pre-2.0 version of FreeBSD, you can fetch
the current <application>CTM</application> sources directly
from:</para>
<para><ulink
url="ftp://ftp.FreeBSD.org/pub/FreeBSD/FreeBSD-current/src/usr.sbin/ctm/">ftp://ftp.FreeBSD.org/pub/FreeBSD/FreeBSD-current/src/usr.sbin/ctm/</ulink></para>
<para>The &ldquo;deltas&rdquo; you feed <application>CTM</application>
can be had two ways, FTP or e-mail. If you have general FTP access
to the Internet then the following FTP sites support access to
<application>CTM</application>:</para>
<para><ulink
url="ftp://ftp.FreeBSD.org/pub/FreeBSD/CTM/">ftp://ftp.FreeBSD.org/pub/FreeBSD/CTM/</ulink></para>
<para>or see section <link linkend="mirrors-ctm">mirrors</link>.</para>
<para>FTP the relevant directory and fetch the
<filename>README</filename> file, starting from there.</para>
<para>If you may wish to get your deltas via email:</para>
<para>Send email to &a.majordomo; to subscribe to one of the
<application>CTM</application> distribution lists.
&ldquo;ctm-cvs-cur&rdquo; supports the entire cvs tree.
&ldquo;ctm-src-cur&rdquo; supports the head of the development
branch. &ldquo;ctm-src-2_2&rdquo; supports the 2.2 release branch,
etc. (If you do not know how to subscribe yourself using majordomo,
send a message first containing the word <literal>help</literal>
&mdash; it will send you back usage instructions.)</para>
<para>When you begin receiving your <application>CTM</application>
updates in the mail, you may use the <command>ctm_rmail</command>
program to unpack and apply them. You can actually use the
<command>ctm_rmail</command> program directly from a entry in
<filename>/etc/aliases</filename> if you want to have the process
run in a fully automated fashion. Check the
<command>ctm_rmail</command> man page for more details.</para>
<note>
<para>No matter what method you use to get the
<application>CTM</application> deltas, you should subscribe to the
<email>ctm-announce@FreeBSD.org</email> mailing list. In the
future, this will be the only place where announcements concerning
the operations of the <application>CTM</application> system will
be posted. Send an email to &a.majordomo; with a single line of
<literal>subscribe ctm-announce</literal> to get added to the
list.</para>
</note>
</sect3>
<sect3>
<title>Starting off with <application>CTM</application> for the first
time</title>
<para>Before you can start using <application>CTM</application>
deltas, you will need to get to a starting point for the deltas
produced subsequently to it.</para>
<para>First you should determine what you already have. Everyone can
start from an &ldquo;empty&rdquo; directory. You must use an
initial &ldquo;Empty&rdquo delta to start off your
<application>CTM</application> supported tree. At some point it is
intended that one of these &ldquo;started&rdquo; deltas be
distributed on the CD for your convenience. This does not currently
happen however.</para>
<para>However, since the trees are many tens of megabytes, you should
prefer to start from something already at hand. If you have a
RELEASE CD, you can copy or extract an initial source from it. This
will save a significant transfer of data.</para>
<para>You can recognize these &ldquo;starter&rdquo; deltas by the
<literal>X</literal> appended to the number
(<filename>src-cur.3210XEmpty.gz</filename> for instance). The
designation following the <filename>X</filename> corresponds to the
origin of your initial &ldquo;seed&rdquo;.
<filename>Empty</filename> is an empty directory. As a rule a base
transition from <filename>Empty</filename> is produced every 100
deltas. By the way, they are large! 25 to 30 Megabytes of
<command>gzip</command>'ed data is common for the
<filename>XEmpty</filename> deltas.</para>
<para>Once you've picked a base delta to start from, you will also
need all deltas with higher numbers following it.</para>
</sect3>
<sect3>
<title>Using <application>CTM</application> in your daily life</title>
<para>To apply the deltas, simply say:</para>
<screen>&prompt.root; <userinput>cd /where/ever/you/want/the/stuff</userinput>
&prompt.root; <userinput>ctm -v -v /where/you/store/your/deltas/src-xxx.*</userinput></screen>
<para><application>CTM</application> understands deltas which have
been put through <command>gzip</command>, so you do not need to
gunzip them first, this saves disk space.</para>
<para>Unless it feels very secure about the entire process,
<application>CTM</application> will not touch your tree. To verify
a delta you can also use the <option>-c</option> flag and
<application>CTM</application> will not actually touch your tree; it
will merely verify the integrity of the delta and see if it would
apply cleanly to your current tree.</para>
<para>There are other options to <application>CTM</application> as
well, see the manual pages or look in the sources for more
information.</para>
<para>I would also be very happy if somebody could help with the
&ldquo;user interface&rdquo; portions, as I have realized that I
cannot make up my mind on what options should do what, how and
when...</para>
<para>That's really all there is to it. Every time you get a new
delta, just run it through <application>CTM</application> to keep
your sources up to date.</para>
<para>Do not remove the deltas if they are hard to download again. You
just might want to keep them around in case something bad happens.
Even if you only have floppy disks, consider using
<command>fdwrite</command> to make a copy.</para>
</sect3>
<sect3>
<title>Keeping your local changes</title>
<para>As a developer one would like to experiment with and change
files in the source tree. <application>CTM</application> supports
local modifications in a limited way: before checking for the
presence of a file <filename>foo</filename>, it first looks for
<filename>foo.ctm</filename>. If this file exists, CTM will operate
on it instead of <filename>foo</filename>.</para>
<para>This behaviour gives us a simple way to maintain local changes:
simply copy the files you plan to modify to the corresponding file
names with a <filename>.ctm</filename> suffix. Then you can freely
hack the code, while CTM keeps the <filename>.ctm</filename> file
up-to-date.</para>
</sect3>
<sect3>
<title>Other interesting <application>CTM</application> options</title>
<sect4>
<title>Finding out exactly what would be touched by an
update</title>
<para>You can determine the list of changes that
<application>CTM</application> will make on your source repository
using the <option>-l</option> option to
<application>CTM</application>.</para>
<para>This is useful if you would like to keep logs of the changes,
pre- or post- process the modified files in any manner, or just
are feeling a tad paranoid <!-- smiley -->:-).</para>
</sect4>
<sect4>
<title>Making backups before updating</title>
<para>Sometimes you may want to backup all the files that would be
changed by a <application>CTM</application> update.</para>
<para>Specifying the <option>-B backup-file</option> option causes
<application>CTM</application> to backup all files that would be
touched by a given <application>CTM</application> delta to
<filename>backup-file</filename>.</para>
</sect4>
<sect4>
<title>Restricting the files touched by an update</title>
<para>Sometimes you would be interested in restricting the scope of
a given <application>CTM</application> update, or may be
interested in extracting just a few files from a sequence of
deltas.</para>
<para>You can control the list of files that
<application>CTM</application> would operate on by specifying
filtering regular expressions using the <option>-e</option> and
<option>-x</option> options.</para>
<para>For example, to extract an up-to-date copy of
<filename>lib/libc/Makefile</filename> from your collection of
saved CTM deltas, run the commands:</para>
<screen>&prompt.root; <userinput>cd /where/ever/you/want/to/extract/it/</userinput>
&prompt.root; <userinput>ctm -e '^lib/libc/Makefile' ~ctm/src-xxx.*</userinput></screen>
<para>For every file specified in a <application>CTM</application>
delta, the <option>-e</option> and <option>-x</option> options are
applied in the order given on the command line. The file is
processed by <application>CTM</application> only if it is marked
as eligible after all the <option>-e</option> and
<option>-x</option> options are applied to it.</para>
</sect4>
</sect3>
<sect3>
<title>Future plans for <application>CTM</application></title>
<para>Tons of them:</para>
<itemizedlist>
<listitem>
<para>Use some kind of authentication into the CTM system, so as
to allow detection of spoofed CTM updates.</para>
</listitem>
<listitem>
<para>Clean up the options to <application>CTM</application>, they
became confusing and counter intuitive.</para>
</listitem>
</itemizedlist>
<para>The bad news is that I am very busy, so any help in doing this
will be most welcome. And do not forget to tell me what you want
also...</para>
</sect3>
<sect3>
<title>Miscellaneous stuff</title>
<para>All the &ldquo;DES infected&rdquo; (e.g. export controlled)
source is not included. You will get the
&ldquo;international&rdquo; version only. If sufficient interest
appears, we will set up a <literal>sec-cur</literal> sequence too.
There is a sequence of deltas for the <literal>ports</literal>
collection too, but interest has not been all that high yet. Tell me
if you want an email list for that too and we will consider setting
it up.</para>
</sect3>
<sect3>
<title>Thanks!</title>
<variablelist>
<varlistentry>
<term>&a.bde;</term>
<listitem>
<para>for his pointed pen and invaluable comments.</para>
</listitem>
</varlistentry>
<varlistentry>
<term>&a.sos;</term>
<listitem>
<para>for patience.</para>
</listitem>
</varlistentry>
<varlistentry>
<term>Stephen McKay</term>
<listitem>
<para>wrote <command>ctm_[rs]mail</command>, much
appreciated.</para>
</listitem>
</varlistentry>
<varlistentry>
<term>&a.jkh;</term>
<listitem>
<para>for being so stubborn that I had to make it better.</para>
</listitem>
</varlistentry>
<varlistentry>
<term>All the users</term>
<listitem>
<para>I hope you like it...</para>
</listitem>
</varlistentry>
</variablelist>
</sect3>
</sect2>
<sect2 id="cvsup">
<title><application>CVSup</application></title>
<para><emphasis>Contributed by &a.jdp;</emphasis>.</para>
<sect3 id="cvsup-intro">
<title>Introduction</title>
<para><application>CVSup</application> is a software package for
distributing and updating source trees from a master CVS repository
on a remote server host. The FreeBSD sources are maintained in a
CVS repository on a central development machine in California. With
<application>CVSup</application>, FreeBSD users can easily keep
their own source trees up to date.</para>
<para><application>CVSup</application> uses the so-called
<emphasis>pull</emphasis> model of updating. Under the pull model,
each client asks the server for updates, if and when they are
wanted. The server waits passively for update requests from its
clients. Thus all updates are instigated by the client. The server
never sends unsolicited updates. Users must either run the
<application>CVSup</application> client manually to get an update,
or they must set up a <command>cron</command> job to run it
automatically on a regular basis.</para>
<para>The term <application>CVSup</application>, capitalized just so,
refers to the entire software package. Its main components are the
client <command>cvsup</command> which runs on each user's machine,
and the server <command>cvsupd</command> which runs at each of the
FreeBSD mirror sites.</para>
<para>As you read the FreeBSD documentation and mailing lists, you may
see references to <application>sup</application>.
<application>Sup</application> was the predecessor of
<application>CVSup</application>, and it served a similar purpose.
<application>CVSup</application> is in used in much the same way as
sup and, in fact, uses configuration files which are
backward-compatible with <command>sup</command>'s.
<application>Sup</application> is no longer used in the FreeBSD
project, because <application>CVSup</application> is both faster and
more flexible.</para>
</sect3>
<sect3 id="cvsup-install">
<title>Installation</title>
<para>The easiest way to install <application>CVSup</application> if
you are running FreeBSD 2.2 or later is to use either <ulink
url="ftp://ftp.FreeBSD.org/pub/FreeBSD/ports/ports-current/net/cvsup.tar">the
port</ulink> from the FreeBSD <link linkend="ports">ports
collection</link> or the corresponding <ulink
url="ftp://ftp.FreeBSD.org/pub/FreeBSD/packages-current/net/cvsup-16.0.tgz">binary
package</ulink>, depending on whether you prefer to roll your own
or not.</para>
<para>If you are running FreeBSD-2.1.6 or 2.1.7, you unfortunately
cannot use the binary package versions due to the fact that they
require a version of the C library that does not yet exist in
FreeBSD-2.1.{6,7}. You can easily use <ulink
url="ftp://ftp.FreeBSD.org/pub/FreeBSD/ports/ports-current/net/cvsup.tar">the
port</ulink>, however, just as with FreeBSD 2.2. Simply unpack
the tar file, cd to the cvsup subdirectory and type <command>make
install</command>.</para>
<para>Because <application>CVSup</application> is written in <ulink
url="http://www.research.digital.com/SRC/modula-3/html/home.html">Modula-3</ulink>,
both the package and the port require that the Modula-3 runtime
libraries be installed. These are available as the <ulink
url="ftp://ftp.FreeBSD.org/pub/FreeBSD/ports/ports-current/lang/modula-3-lib.tar">lang/modula-3-lib</ulink> port and the <ulink url="ftp://ftp.FreeBSD.org/pub/FreeBSD/packages-current/lang/modula-3-lib-3.6.tgz">lang/modula-3-lib-3.6</ulink> package.
If you follow the same directions as for <command>cvsup</command>,
these libraries will be compiled and/or installed automatically when
you install the <application>CVSup</application> port or
package.</para>
<para>The Modula-3 libraries are rather large, and fetching and
compiling them is not an instantaneous process. For that reason, a
third option is provided. You can get <emphasis>statically
linked</emphasis> FreeBSD executables for
<application>CVSup</application> from the USA distribution
site:</para>
<itemizedlist>
<listitem>
<para><ulink
url="ftp://ftp.FreeBSD.org/pub/FreeBSD/development/CVSup/cvsup-bin-16.0.tar.gz">ftp://ftp.FreeBSD.org/pub/FreeBSD/development/CVSup/cvsup-bin-16.0.tar.gz</ulink> (client including GUI).</para>
</listitem>
<listitem>
<para><ulink
url="ftp://ftp.FreeBSD.org/pub/FreeBSD/development/CVSup/cvsup.nogui-bin-16.0.tar.gz">ftp://ftp.FreeBSD.org/pub/FreeBSD/development/CVSup/cvsup.nogui-bin-16.0.tar.gz</ulink> (client without GUI).</para>
</listitem>
<listitem>
<para><ulink
url="ftp://ftp.FreeBSD.org/pub/FreeBSD/development/CVSup/cvsupd-bin-16.0.tar.gz">ftp://ftp.FreeBSD.org/pub/FreeBSD/development/CVSup/cvsupd-bin-16.0.tar.gz</ulink> (server).</para>
</listitem>
</itemizedlist>
<para>as well as from the many FreeBSD <link linkend="mirrors-ftp">FTP
mirror sites</link> around the world.</para>
<para>Most users will need only the client. These executables are
entirely self-contained, and they will run on any version of FreeBSD
from FreeBSD-2.1.0 to FreeBSD-current.</para>
<para>In summary, your options for installing CVSup are:</para>
<itemizedlist>
<listitem>
<para>FreeBSD-2.2 or later: static binary, port, or
package</para>
</listitem>
<listitem>
<para>FreeBSD-2.1.6, 2.1.7: static binary or port</para>
</listitem>
<listitem>
<para>FreeBSD-2.1.5 or earlier: static binary</para>
</listitem>
</itemizedlist>
</sect3>
<sect3 id="cvsup-config">
<title>CVSup Configuration</title>
<para><application>CVSup</application>'s operation is controlled by a
configuration file called the <filename>supfile</filename>.
Beginning with FreeBSD-2.2, there are some sample
<filename>supfiles</filename> in the directory <ulink
url="file:/usr/share/examples/cvsup/">/usr/share/examples/cvsup/</ulink>.
These examples are also available from <ulink
url="ftp://ftp.FreeBSD.org/pub/FreeBSD/FreeBSD-current/src/share/examples/cvsup/">ftp://ftp.FreeBSD.org/pub/FreeBSD/FreeBSD-current/src/share/examples/cvsup/</ulink> if you are on a pre-2.2 system.</para>
<para>The information in a <filename>supfile</filename> answers the
following questions for cvsup:</para>
<itemizedlist>
<listitem>
<para><link linkend="cvsup-config-files">Which files do you want
to receive?</link></para>
</listitem>
<listitem>
<para><link linkend="cvsup-config-vers">Which versions of them do
you want?</link></para>
</listitem>
<listitem>
<para><link linkend="cvsup-config-where">Where do you want to get
them from?</link></para>
</listitem>
<listitem>
<para><link linkend="cvsup-config-dest">Where do you want to put
them on your own machine?</link></para>
</listitem>
<listitem>
<para><link linkend="cvsup-config-status">Where do you want to put
your status files?</link></para>
</listitem>
</itemizedlist>
<para>In the following sections, we will construct a typical
<filename>supfile</filename> by answering each of these questions in
turn. First, we describe the overall structure of a
<filename>supfile</filename>.</para>
<para>A <filename>supfile</filename> is a text file. Comments begin
with <literal>#</literal> and extend to the end of the line. Lines
that are blank and lines that contain only comments are
ignored.</para>
<para>Each remaining line describes a set of files that the user
wishes to receive. The line begins with the name of a
&ldquo;collection&rdquo;, a logical grouping of files defined by the
server. The name of the collection tells the server which files you
want. After the collection name come zero or more fields, separated
by white space. These fields answer the questions listed above.
There are two types of fields: flag fields and value fields. A flag
field consists of a keyword standing alone, e.g.,
<literal>delete</literal> or <literal>compress</literal>. A value
field also begins with a keyword, but the keyword is followed
without intervening white space by <literal>=</literal> and a second
word. For example, <literal>release=cvs</literal> is a value
field.</para>
<para>A <filename>supfile</filename> typically specifies more than one
collection to receive. One way to structure a
<filename>supfile</filename> is to specify all of the relevant
fields explicitly for each collection. However, that tends to make
the <filename>supfile</filename> lines quite long, and it is
inconvenient because most fields are the same for all of the
collections in a <filename>supfile</filename>.
<application>CVSup</application> provides a defaulting mechanism to
avoid these problems. Lines beginning with the special
pseudo-collection name <literal>*default</literal> can be used to
set flags and values which will be used as defaults for the
subsequent collections in the <filename>supfile</filename>. A
default value can be overridden for an individual collection, by
specifying a different value with the collection itself. Defaults
can also be changed or augmented in mid-supfile by additional
<literal>*default</literal> lines.</para>
<para>With this background, we will now proceed to construct a
<filename>supfile</filename> for receiving and updating the main
source tree of <link
linkend="current">FreeBSD-current</link>.</para>
<itemizedlist>
<listitem>
<para>Which files do you want to receive?<anchor
id="cvsup-config-files"></para>
<para>The files available via <application>CVSup</application> are
organized into named groups called &ldquo;collections&rdquo;.
The collections that are available are described <link
linkend="cvsup-collec">here</link>. In this example, we wish
to receive the entire main source tree for the FreeBSD system.
There is a single large collection <literal>src-all</literal>
which will give us all of that, except the export-controlled
cryptography support. Let us assume for this example that we
are in the USA or Canada. Then we can get the cryptography code
with one additional collection, <literal>cvs-crypto</literal>.
As a first step toward constructing our
<filename>supfile</filename>, we simply list these collections,
one per line:</para>
<programlisting>
src-all
cvs-crypto</programlisting>
</listitem>
<listitem>
<para>Which version(s) of them do you want?<anchor
id="cvsup-config-vers"></para>
<para>With <application>CVSup</application>, you can receive
virtually any version of the sources that ever existed. That is
possible because the cvsupd server works directly from the CVS
repository, which contains all of the versions. You specify
which one of them you want using the <literal>tag=</literal> and
<option>date=</option> value fields.</para>
<warning>
<para>Be very careful to specify any <literal>tag=</literal>
fields correctly. Some tags are valid only for certain
collections of files. If you specify an incorrect or
misspelled tag, CVSup will delete files which you probably do
not want deleted. In particular, use <emphasis>only
</emphasis> <literal>tag=.</literal> for the
<literal>ports-*</literal> collections.</para>
</warning>
<para>The <literal>tag=</literal> field names a symbolic tag in
the repository. There are two kinds of tags, revision tags and
branch tags. A revision tag refers to a specific revision. Its
meaning stays the same from day to day. A branch tag, on the
other hand, refers to the latest revision on a given line of
development, at any given time. Because a branch tag does not
refer to a specific revision, it may mean something different
tomorrow than it means today.</para>
<para>Here are the branch tags that users might be interested
in:</para>
<variablelist>
<varlistentry>
<term>tag=.</term>
<listitem>
<para>The main line of development, also known as
FreeBSD-current.</para>
<note>
<para>The <literal>.</literal> is not punctuation; it is
the name of the tag. Valid for all collections.</para>
</note>
</listitem>
</varlistentry>
<varlistentry>
<term>RELENG_3</term>
<listitem>
<para>The line of development for FreeBSD-3.x, also known as
FreeBSD-stable. Not valid for the ports
collection.</para>
</listitem>
</varlistentry>
<varlistentry>
<term>RELENG_2_2</term>
<listitem>
<para>The line of development for FreeBSD-2.2.x, also known
as 2.2-stable. Not valid for the ports collection.</para>
</listitem>
</varlistentry>
<varlistentry>
<term>tag=RELENG_2_1_0</term>
<listitem>
<para>The line of development for FreeBSD-2.1.x - this
branch is largely obsolete. Not valid for the ports-*
collections.</para>
</listitem>
</varlistentry>
</variablelist>
<para>Here are the revision tags that users might be interested
in:</para>
<variablelist>
<varlistentry>
<term>tag=RELENG_3_2_0_RELEASE</term>
<listitem>
<para>FreeBSD-3.2. Not valid for the ports-*
collections.</para>
</listitem>
</varlistentry>
<varlistentry>
<term>tag=RELENG_3_1_0_RELEASE</term>
<listitem>
<para>FreeBSD-3.1. Not valid for the ports-*
collections.</para>
</listitem>
</varlistentry>
<varlistentry>
<term>tag=RELENG_3_0_0_RELEASE</term>
<listitem>
<para>FreeBSD-3.0. Not valid for the ports-*
collections.</para>
</listitem>
</varlistentry>
<varlistentry>
<term>tag=RELENG_2_2_8_RELEASE</term>
<listitem>
<para>FreeBSD-2.2.8. Not valid for the ports-*
collections.</para>
</listitem>
</varlistentry>
<varlistentry>
<term>tag=RELENG_2_2_7_RELEASE</term>
<listitem>
<para>FreeBSD-2.2.7. Not valid for the ports-*
collections.</para>
</listitem>
</varlistentry>
<varlistentry>
<term>tag=RELENG_2_2_6_RELEASE</term>
<listitem>
<para>FreeBSD-2.2.6. Not valid for the ports-*
collections.</para>
</listitem>
</varlistentry>
<varlistentry>
<term>tag=RELENG_2_2_5_RELEASE</term>
<listitem>
<para>FreeBSD-2.2.5. Not valid for the ports-*
collections.</para>
</listitem>
</varlistentry>
<varlistentry>
<term>tag=RELENG_2_2_2_RELEASE</term>
<listitem>
<para>FreeBSD-2.2.2. Not valid for the ports-*
collections.</para>
</listitem>
</varlistentry>
<varlistentry>
<term>tag=RELENG_2_2_1_RELEASE</term>
<listitem>
<para>FreeBSD-2.2.1. Not valid for the ports-*
collections.</para>
</listitem>
</varlistentry>
<varlistentry>
<term>tag=RELENG_2_2_0_RELEASE</term>
<listitem>
<para>FreeBSD-2.2.0. Not valid for the ports-*
collections.</para>
</listitem>
</varlistentry>
<varlistentry>
<term>tag=RELENG_2_1_7_RELEASE</term>
<listitem>
<para>FreeBSD-2.1.7. Not valid for the ports-*
collections.</para>
</listitem>
</varlistentry>
<varlistentry>
<term>tag=RELENG_2_1_6_1_RELEASE</term>
<listitem>
<para>FreeBSD-2.1.6.1. Not valid for the ports-*
collections.</para>
</listitem>
</varlistentry>
<varlistentry>
<term>tag=RELENG_2_1_6_RELEASE</term>
<listitem>
<para>FreeBSD-2.1.6. Not valid for the ports-*
collections.</para>
</listitem>
</varlistentry>
<varlistentry>
<term>tag=RELENG_2_1_5_RELEASE</term>
<listitem>
<para>FreeBSD-2.1.5. Not valid for the ports-*
collections.</para>
</listitem>
</varlistentry>
<varlistentry>
<term>tag=RELENG_2_1_0_RELEASE</term>
<listitem>
<para>FreeBSD-2.1.0. Not valid for the ports-*
collections.</para>
</listitem>
</varlistentry>
</variablelist>
<warning>
<para>Be very careful to type the tag name exactly as shown.
<application>CVSup</application> cannot distinguish between
valid and invalid tags. If you misspell the tag,
<application>CVSup</application> will behave as though you had
specified a valid tag which happens to refer to no files at
all. It will delete your existing sources in that
case.</para>
</warning>
<para>When you specify a branch tag, you normally receive the
latest versions of the files on that line of development. If
you wish to receive some past version, you can do so by
specifying a date with the <option>date=</option> value field.
The &man.cvsup.1; manual page explains how to do
that.</para>
<para>For our example, we wish to receive FreeBSD-current. We add
this line at the beginning of our
<filename>supfile</filename>:</para>
<programlisting>
*default tag=.</programlisting>
<para>There is an important special case that comes into play if
you specify neither a <literal>tag=</literal> field nor a
<literal>date=</literal> field. In that case, you receive the
actual RCS files directly from the server's CVS repository,
rather than receiving a particular version. Developers
generally prefer this mode of operation. By maintaining a copy
of the repository itself on their systems, they gain the ability
to browse the revision histories and examine past versions of
files. This gain is achieved at a large cost in terms of disk
space, however.</para>
</listitem>
<listitem>
<para>Where do you want to get them from?<anchor
id="cvsup-config-where"></para>
<para>We use the <literal>host=</literal> field to tell
<command>cvsup</command> where to obtain its updates. Any of
the <link linkend="mirrors-cvsup">CVSup mirror sites</link> will
do, though you should try to select one that is close to you in
cyberspace. In this example we will use a fictional FreeBSD
distribution site, <hostid
role="fqdn">cvsup666.FreeBSD.org</hostid>:</para>
<programlisting>
*default host=cvsup666.FreeBSD.org</programlisting>
<para>You will need to change the host to one that actually exists
before running CVSup. On any particular run of
<command>cvsup</command>, you can override the host setting on
the command line, with <option>-h
<replaceable>hostname</replaceable></option>.</para>
</listitem>
<listitem>
<para>Where do you want to put them on your own machine?<anchor
id="cvsup-config-dest"></para>
<para>The <literal>prefix=</literal> field tells
<command>cvsup</command> where to put the files it receives. In
this example, we will put the source files directly into our
main source tree, <filename>/usr/src</filename>. The
<filename>src</filename> directory is already implicit in the
collections we have chosen to receive, so this is the correct
specification:</para>
<programlisting>
*default prefix=/usr</programlisting>
</listitem>
<listitem>
<para>Where should <command>cvsup</command> maintain its status
files?<anchor id="cvsup-config-status"></para>
<para>The cvsup client maintains certain status files in what is
called the &ldquo;base&rdquo; directory. These files help
<application>CVSup</application> to work more efficiently, by
keeping track of which updates you have already received. We
will use the standard base directory,
<filename>/usr/local/etc/cvsup</filename>:</para>
<programlisting>
*default base=/usr/local/etc/cvsup</programlisting>
<para>This setting is used by default if it is not specified in
the <filename>supfile</filename>, so we actually do not need the
above line.</para>
<para>If your base directory does not already exist, now would be
a good time to create it. The <command>cvsup</command> client
will refuse to run if the base directory does not exist.</para>
</listitem>
<listitem>
<para>Miscellaneous <filename>supfile</filename> settings:</para>
<para>There is one more line of boiler plate that normally needs
to be present in the <filename>supfile</filename>:</para>
<programlisting>
*default release=cvs delete use-rel-suffix compress</programlisting>
<para><literal>release=cvs</literal> indicates that the server
should get its information out of the main FreeBSD CVS
repository. This is virtually always the case, but there are
other possibilities which are beyond the scope of this
discussion.</para>
<para><literal>delete</literal> gives
<application>CVSup</application> permission to delete files.
You should always specify this, so that
<application>CVSup</application> can keep your source tree fully
up to date. <application>CVSup</application> is careful to
delete only those files for which it is responsible. Any extra
files you happen to have will be left strictly alone.</para>
<para><literal>use-rel-suffix</literal> is ... arcane. If you
really want to know about it, see the &man.cvsup.1; manual page.
Otherwise, just specify it and do not worry about it.</para>
<para><literal>compress</literal> enables the use of gzip-style
compression on the communication channel. If your network link
is T1 speed or faster, you probably should not use compression.
Otherwise, it helps substantially.</para>
</listitem>
<listitem>
<para>Putting it all together:</para>
<para>Here is the entire <filename>supfile</filename> for our
example:</para>
<programlisting>
*default tag=.
*default host=cvsup666.FreeBSD.org
*default prefix=/usr
*default base=/usr/local/etc/cvsup
*default release=cvs delete use-rel-suffix compress
src-all
cvs-crypto</programlisting>
</listitem>
</itemizedlist>
</sect3>
<sect3>
<title>Running <application>CVSup</application></title>
<para>You are now ready to try an update. The command line for doing
this is quite simple:</para>
<screen>&prompt.root; <userinput>cvsup <replaceable>supfile</replaceable></userinput></screen>
<para>where <filename><replaceable>supfile</replaceable></filename> is
of course the name of the supfile you have just created. Assuming
you are running under X11, <command>cvsup</command> will display a
GUI window with some buttons to do the usual things. Press the
&ldquo;go&rdquo; button, and watch it run.</para>
<para>Since you are updating your actual <filename>/usr/src</filename>
tree in this example, you will need to run the program as
<username>root</username> so that <command>cvsup</command> has the
permissions it needs to update your files. Having just created your
configuration file, and having never used this program before, that
might understandably make you nervous. There is an easy way to do a
trial run without touching your precious files. Just create an
empty directory somewhere convenient, and name it as an extra
argument on the command line:</para>
<screen>&prompt.root; <userinput>mkdir /var/tmp/dest</userinput>
&prompt.root; <userinput>cvsup supfile /var/tmp/dest</userinput></screen>
<para>The directory you specify will be used as the destination
directory for all file updates. <application>CVSup</application>
will examine your usual files in <filename>/usr/src</filename>, but
it will not modify or delete any of them. Any file updates will
instead land in <filename>/var/tmp/dest/usr/src</filename>.
<application>CVSup</application> will also leave its base directory
status files untouched when run this way. The new versions of those
files will be written into the specified directory. As long as you
have read access to <filename>/usr/src</filename>, you do not even
need to be root to perform this kind of trial run.</para>
<para>If you are not running X11 or if you just do not like GUIs, you
should add a couple of options to the command line when you run
cvsup:</para>
<screen>&prompt.root; <userinput>cvsup -g -L 2 supfile</userinput></screen>
<para>The <option>-g</option> tells cvsup not to use its GUI. This is
automatic if you are not running X11, but otherwise you have to
specify it.</para>
<para>The <option>-L 2</option> tells cvsup to print out the details
of all the file updates it is doing. There are three levels of
verbosity, from <option>-L 0</option> to <option>-L 2</option>. The
default is 0, which means total silence except for error
messages.</para>
<para>There are plenty of other options available. For a brief list
of them, type <command>cvsup -H</command>. For more detailed
descriptions, see the manual page.</para>
<para>Once you are satisfied with the way updates are working, you can
arrange for regular runs of cvsup using &man.cron.8;.
Obviously, you should not let cvsup use its GUI when running it from
cron.</para>
</sect3>
<sect3 id="cvsup-collec">
<title><application>CVSup</application> File Collections</title>
<para>The file collections available via
<application>CVSup</application> are organized hierarchically.
There are a few large collections, and they are divided into smaller
sub-collections. Receiving a large collection is equivalent to
receiving each of its sub-collections. The hierarchical
relationships among collections are reflected by the use of
indentation in the list below.</para>
<para>The most commonly used collections are
<literal>src-all</literal>, <literal>cvs-crypto</literal>, and
<literal>ports-all</literal>. The other collections are used only
by small groups of people for specialized purposes, and some mirror
sites may not carry all of them.</para>
<variablelist>
<varlistentry>
<term><literal>cvs-all release=cvs</literal></term>
<listitem>
<para>The main FreeBSD CVS repository, excluding the
export-restricted cryptography code.</para>
<variablelist>
<varlistentry>
<term><literal>distrib release=cvs</literal></term>
<listitem>
<para>Files related to the distribution and mirroring of
FreeBSD.</para>
</listitem>
</varlistentry>
<varlistentry>
<term><literal>doc-all release=cvs</literal></term>
<listitem>
<para>Sources for the FreeBSD handbook and other
documentation.</para>
</listitem>
</varlistentry>
<varlistentry>
<term><literal>ports-all release=cvs</literal></term>
<listitem>
<para>The FreeBSD ports collection.</para>
<variablelist>
<varlistentry>
<term><literal>ports-archivers
release=cvs</literal></term>
<listitem>
<para>Archiving tools.</para>
</listitem>
</varlistentry>
<varlistentry>
<term><literal>ports-astro
release=cvs</literal></term>
<listitem>
<para>Astronomical ports.</para>
</listitem>
</varlistentry>
<varlistentry>
<term><literal>ports-audio
release=cvs</literal></term>
<listitem>
<para>Sound support.</para>
</listitem>
</varlistentry>
<varlistentry>
<term><literal>ports-base release=cvs</literal></term>
<listitem>
<para>Miscellaneous files at the top of
/usr/ports.</para>
</listitem>
</varlistentry>
<varlistentry>
<term><literal>ports-benchmarks
release=cvs</literal></term>
<listitem>
<para>Benchmarks.</para>
</listitem>
</varlistentry>
<varlistentry>
<term><literal>ports-biology
release=cvs</literal></term>
<listitem>
<para>Biology.</para>
</listitem>
</varlistentry>
<varlistentry>
<term><literal>ports-cad release=cvs</literal></term>
<listitem>
<para>Computer aided design tools.</para>
</listitem>
</varlistentry>
<varlistentry>
<term><literal>ports-chinese
release=cvs</literal></term>
<listitem>
<para>Chinese language support.</para>
</listitem>
</varlistentry>
<varlistentry>
<term><literal>ports-comms
release=cvs</literal></term>
<listitem>
<para>Communication software.</para>
</listitem>
</varlistentry>
<varlistentry>
<term><literal>ports-converters
release=cvs</literal></term>
<listitem>
<para>character code converters.</para>
</listitem>
</varlistentry>
<varlistentry>
<term><literal>ports-databases
release=cvs</literal></term>
<listitem>
<para>Databases.</para>
</listitem>
</varlistentry>
<varlistentry>
<term><literal></literal>ports-deskutils
release=cvs</term>
<listitem>
<para>Things that used to be on the desktop before
computers were invented.</para>
</listitem>
</varlistentry>
<varlistentry>
<term><literal>ports-devel
release=cvs</literal></term>
<listitem>
<para>Development utilities.</para>
</listitem>
</varlistentry>
<varlistentry>
<term><literal>ports-editors
release=cvs</literal></term>
<listitem>
<para>Editors.</para>
</listitem>
</varlistentry>
<varlistentry>
<term><literal>ports-emulators
release=cvs</literal></term>
<listitem>
<para>Emulators for other operating systems.</para>
</listitem>
</varlistentry>
<varlistentry>
<term><literal>ports-ftp
release=cvs</literal></term>
<listitem>
<para>FTP client and server utilities.</para>
</listitem>
</varlistentry>
<varlistentry>
<term><literal>ports-games
release=cvs</literal></term>
<listitem>
<para>Games.</para>
</listitem>
</varlistentry>
<varlistentry>
<term><literal>ports-german
release=cvs</literal></term>
<listitem>
<para>German language support.</para>
</listitem>
</varlistentry>
<varlistentry>
<term><literal>ports-graphics
release=cvs</literal></term>
<listitem>
<para>Graphics utilities.</para>
</listitem>
</varlistentry>
<varlistentry>
<term><literal>ports-japanese
release=cvs</literal></term>
<listitem>
<para>Japanese language support.</para>
</listitem>
</varlistentry>
<varlistentry>
<term><literal>ports-korean
release=cvs</literal></term>
<listitem>
<para>Korean language support.</para>
</listitem>
</varlistentry>
<varlistentry>
<term><literal>ports-lang release=cvs</literal></term>
<listitem>
<para>Programming languages.</para>
</listitem>
</varlistentry>
<varlistentry>
<term><literal>ports-mail release=cvs</literal></term>
<listitem>
<para>Mail software.</para>
</listitem>
</varlistentry>
<varlistentry>
<term><literal>ports-math release=cvs</literal></term>
<listitem>
<para>Numerical computation software.</para>
</listitem>
</varlistentry>
<varlistentry>
<term><literal>ports-mbone
release=cvs</literal></term>
<listitem>
<para>MBone applications.</para>
</listitem>
</varlistentry>
<varlistentry>
<term><literal>ports-misc release=cvs</literal></term>
<listitem>
<para>Miscellaneous utilities.</para>
</listitem>
</varlistentry>
<varlistentry>
<term><literal>ports-net release=cvs</literal></term>
<listitem>
<para>Networking software.</para>
</listitem>
</varlistentry>
<varlistentry>
<term><literal>ports-news release=cvs</literal></term>
<listitem>
<para>USENET news software.</para>
</listitem>
</varlistentry>
<varlistentry>
<term><literal>ports-palm
release=cvs</literal></term>
<listitem>
<para>Software support for 3Com Palm(tm) series.</para>
</listitem>
</varlistentry>
<varlistentry>
<term><literal>ports-plan9
release=cvs</literal></term>
<listitem>
<para>Various programs from Plan9.</para>
</listitem>
</varlistentry>
<varlistentry>
<term><literal>ports-print
release=cvs</literal></term>
<listitem>
<para>Printing software.</para>
</listitem>
</varlistentry>
<varlistentry>
<term><literal>ports-russian
release=cvs</literal></term>
<listitem>
<para>Russian language support.</para>
</listitem>
</varlistentry>
<varlistentry>
<term><literal>ports-security
release=cvs</literal></term>
<listitem>
<para>Security utilities.</para>
</listitem>
</varlistentry>
<varlistentry>
<term><literal>ports-shells
release=cvs</literal></term>
<listitem>
<para>Command line shells.</para>
</listitem>
</varlistentry>
<varlistentry>
<term><literal>ports-sysutils
release=cvs</literal></term>
<listitem>
<para>System utilities.</para>
</listitem>
</varlistentry>
<varlistentry>
<term><literal>ports-textproc
release=cvs</literal></term>
<listitem>
<para>text processing utilities (does not include
desktop publishing).</para>
</listitem>
</varlistentry>
<varlistentry>
<term><literal>ports-vietnamese
release=cvs</literal></term>
<listitem>
<para>Vietnamese language support.</para>
</listitem>
</varlistentry>
<varlistentry>
<term><literal>ports-www release=cvs</literal></term>
<listitem>
<para>Software related to the World Wide Web.</para>
</listitem>
</varlistentry>
<varlistentry>
<term><literal>ports-x11 release=cvs</literal></term>
<listitem>
<para>Ports to support the X window system.</para>
</listitem>
</varlistentry>
<varlistentry>
<term><literal>ports-x11-clocks
release=cvs</literal></term>
<listitem>
<para>X11 clocks.</para>
</listitem>
</varlistentry>
<varlistentry>
<term><literal>ports-x11-fm
release=cvs</literal></term>
<listitem>
<para>X11 file managers.</para>
</listitem>
</varlistentry>
<varlistentry>
<term><literal>ports-x11-fonts
release=cvs</literal></term>
<listitem>
<para>X11 fonts and font utilities.</para>
</listitem>
</varlistentry>
<varlistentry>
<term><literal>ports-x11-toolkits
release=cvs</literal></term>
<listitem>
<para>X11 toolkits.</para>
</listitem>
</varlistentry>
<varlistentry>
<term><literal>ports-x11-wm</literal></term>
<listitem>
<para>X11 window managers.</para>
</listitem>
</varlistentry>
</variablelist>
</listitem>
</varlistentry>
<varlistentry>
<term><literal>src-all release=cvs</literal></term>
<listitem>
<para>The main FreeBSD sources, excluding the
export-restricted cryptography code.</para>
<variablelist>
<varlistentry>
<term><literal>src-base release=cvs</literal></term>
<listitem>
<para>Miscellaneous files at the top of
<filename>/usr/src</filename>.</para>
</listitem>
</varlistentry>
<varlistentry>
<term><literal>src-bin release=cvs</literal></term>
<listitem>
<para>User utilities that may be needed in
single-user mode
(<filename>/usr/src/bin</filename>).</para>
</listitem>
</varlistentry>
<varlistentry>
<term><literal>src-contrib
release=cvs</literal></term>
<listitem>
<para>Utilities and libraries from outside the
FreeBSD project, used relatively unmodified
(<filename>/usr/src/contrib</filename>).</para>
</listitem>
</varlistentry>
<varlistentry>
<term><literal>src-etc release=cvs</literal></term>
<listitem>
<para>System configuration files
(<filename>/usr/src/etc</filename>).</para>
</listitem>
</varlistentry>
<varlistentry>
<term><literal>src-games release=cvs</literal></term>
<listitem>
<para>Games
(<filename>/usr/src/games</filename>).</para>
</listitem>
</varlistentry>
<varlistentry>
<term><literal>src-gnu release=cvs</literal></term>
<listitem>
<para>Utilities covered by the GNU Public License
(<filename>/usr/src/gnu</filename>).</para>
</listitem>
</varlistentry>
<varlistentry>
<term><literal>src-include
release=cvs</literal></term>
<listitem>
<para>Header files
(<filename>/usr/src/include</filename>).</para>
</listitem>
</varlistentry>
<varlistentry>
<term><literal>src-kerberosIV
release=cvs</literal></term>
<listitem>
<para>KerberosIV security package
(<filename>/usr/src/kerberosIV</filename>).</para>
</listitem>
</varlistentry>
<varlistentry>
<term><literal>src-lib release=cvs</literal></term>
<listitem>
<para>Libraries
(<filename>/usr/src/lib</filename>).</para>
</listitem>
</varlistentry>
<varlistentry>
<term><literal>src-libexec
release=cvs</literal></term>
<listitem>
<para>System programs normally executed by other
programs
(<filename>/usr/src/libexec</filename>).</para>
</listitem>
</varlistentry>
<varlistentry>
<term><literal>src-release
release=cvs</literal></term>
<listitem>
<para>Files required to produce a FreeBSD release
(<filename>/usr/src/release</filename>).</para>
</listitem>
</varlistentry>
<varlistentry>
<term><literal>src-sbin release=cvs</literal></term>
<listitem>
<para>System utilities for single-user mode
(<filename>/usr/src/sbin</filename>).</para>
</listitem>
</varlistentry>
<varlistentry>
<term><literal>src-share release=cvs</literal></term>
<listitem>
<para>Files that can be shared across multiple
systems
(<filename>/usr/src/share</filename>).</para>
</listitem>
</varlistentry>
<varlistentry>
<term><literal>src-sys release=cvs</literal></term>
<listitem>
<para>The kernel
(<filename>/usr/src/sys</filename>).</para>
</listitem>
</varlistentry>
<varlistentry>
<term><literal>src-tools release=cvs</literal></term>
<listitem>
<para>Various tools for the maintenance of FreeBSD
(<filename>/usr/src/tools</filename>).</para>
</listitem>
</varlistentry>
<varlistentry>
<term><literal>src-usrbin release=cvs</literal></term>
<listitem>
<para>User utilities
(<filename>/usr/src/usr.bin</filename>).</para>
</listitem>
</varlistentry>
<varlistentry>
<term><literal>src-usrsbin
release=cvs</literal></term>
<listitem>
<para>System utilities
(<filename>/usr/src/usr.sbin</filename>).</para>
</listitem>
</varlistentry>
</variablelist>
</listitem>
</varlistentry>
<varlistentry>
<term><literal>www release=cvs</literal></term>
<listitem>
<para>The sources for the World Wide Web data.</para>
</listitem>
</varlistentry>
</variablelist>
</listitem>
</varlistentry>
<varlistentry>
<term><literal>cvs-crypto release=cvs</literal></term>
<listitem>
<para>The export-restricted cryptography code.</para>
<variablelist>
<varlistentry>
<term><literal>src-crypto release=cvs</literal></term>
<listitem>
<para>Export-restricted utilities and libraries from
outside the FreeBSD project, used relatively unmodified
(<filename>/usr/src/crypto</filename>).</para>
</listitem>
</varlistentry>
<varlistentry>
<term><literal>src-eBones release=cvs</literal></term>
<listitem>
<para>Kerberos and DES
(<filename>/usr/src/eBones</filename>).</para>
</listitem>
</varlistentry>
<varlistentry>
<term><literal>src-secure release=cvs</literal></term>
<listitem>
<para>DES (<filename>/usr/src/secure</filename>).</para>
</listitem>
</varlistentry>
</variablelist>
</listitem>
</varlistentry>
<varlistentry>
<term><literal>distrib release=self</literal></term>
<listitem>
<para>The CVSup server's own configuration files. Used by CVSup
mirror sites.</para>
</listitem>
</varlistentry>
<varlistentry>
<term><literal>gnats release=current</literal></term>
<listitem>
<para>The GNATS bug-tracking database.</para>
</listitem>
</varlistentry>
<varlistentry>
<term><literal>mail-archive release=current</literal></term>
<listitem>
<para>FreeBSD mailing list archive.</para>
</listitem>
</varlistentry>
<varlistentry>
<term><literal>www release=current</literal></term>
<listitem>
<para>The installed World Wide Web data. Used by WWW mirror
sites.</para>
</listitem>
</varlistentry>
</variablelist>
</sect3>
<sect3>
<title>For more information</title>
<para>For the CVSup FAQ and other information about CVSup, see <ulink
url="http://www.polstra.com/projects/freeware/CVSup/">The CVSup
Home Page</ulink>.</para>
<para>Most FreeBSD-related discussion of
<application>CVSup</application> takes place on the &a.hackers;.
New versions of the software are announced there, as well as on the
&a.announce;.</para>
<para>Questions and bug reports should be addressed to the author of
the program at <email>cvsup-bugs@polstra.com</email>.</para>
</sect3>
</sect2>
</sect1>
<sect1 id="makeworld">
<title>Using <command>make world</command> to rebuild your system</title>
<para><emphasis>Contributed by &a.nik;.</emphasis></para>
<para>Once you have synchronised your local source tree against a
particular version of FreeBSD (<literal>stable</literal>,
<literal>current</literal> and so on) you must then use the source tree
to rebuild the system.</para>
<para>Currently, the best source of information on how to do that is a
tutorial available from <ulink
url="http://www.nothing-going-on.demon.co.uk/FreeBSD/make-world/make-world.html">http://www.nothing-going-on.demon.co.uk/FreeBSD/make-world/make-world.html</ulink>.</para>
<para>A successor to this tutorial will be integrated into the
handbook.</para>
</sect1>
</chapter>
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