d10e06baff
Development and Distribution License PR: doc/128563 Submitted by: Steven Kreuzer <skreuzer (at) exit2shell (dot) com>
231 lines
6.8 KiB
Text
231 lines
6.8 KiB
Text
<!--
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The FreeBSD Documentation Project
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$FreeBSD$
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-->
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<chapter id="introduction">
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<chapterinfo>
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<authorgroup>
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<author>
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<firstname>Murray</firstname>
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<surname>Stokely</surname>
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<contrib>Contributed by </contrib>
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</author>
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<author>
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<firstname>Jeroen</firstname>
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<surname>Ruigrok van der Werven</surname>
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</author>
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</authorgroup>
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</chapterinfo>
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<title>Introduction</title>
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<sect1 id="introduction-devel">
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<title>Developing on FreeBSD</title>
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<para>So here we are. System all installed and you are ready to
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start programming. But where to start? What does FreeBSD
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provide? What can it do for me, as a programmer?</para>
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<para>These are some questions which this chapter tries to answer.
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Of course, programming has different levels of proficiency like
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any other trade. For some it is a hobby, for others it is their
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profession. The information in this chapter might be aimed
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toward the beginning programmer; indeed, it could serve useful
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for the programmer unfamiliar with the &os; platform.</para>
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</sect1>
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<sect1 id="introduction-bsdvision">
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<title>The BSD Vision</title>
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<para>To produce the best &unix; like operating system package
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possible, with due respect to the original software tools
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ideology as well as usability, performance and
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stability.</para>
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</sect1>
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<sect1 id="introduction-archguide">
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<title>Architectural Guidelines</title>
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<para>Our ideology can be described by the following
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guidelines</para>
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<itemizedlist>
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<listitem><para>Do not add new functionality unless an
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implementor cannot complete a real application without
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it.</para></listitem>
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<listitem><para>It is as important to decide what a system is
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not as to decide what it is. Do not serve all the world's
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needs; rather, make the system extensible so that additional
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needs can be met in an upwardly compatible
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fashion.</para></listitem>
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<listitem><para>The only thing worse than generalizing from one
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example is generalizing from no examples at
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all. </para></listitem>
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<listitem><para>If a problem is not completely understood, it is
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probably best to provide no solution at all.</para></listitem>
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<listitem><para>If you can get 90 percent of the desired effect
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for 10 percent of the work, use the simpler
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solution.</para></listitem>
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<listitem><para>Isolate complexity as much as
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possible.</para></listitem>
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<listitem><para>Provide mechanism, rather than policy. In
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particular, place user interface policy in the client's
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hands.</para></listitem>
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</itemizedlist>
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<para>From Scheifler & Gettys: "X Window System"</para>
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</sect1>
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<sect1 id="introduction-layout">
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<title>The Layout of
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<filename class="directory">/usr/src</filename></title>
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<para>The complete source code to FreeBSD is available from our
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public CVS repository. The source code is normally installed in
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<filename class="directory">/usr/src</filename> which contains the
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following subdirectories:</para>
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<para>
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<informaltable frame="none" pgwide="1">
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<tgroup cols="2">
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<thead>
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<row>
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<entry>Directory</entry>
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<entry>Description</entry>
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</row>
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</thead>
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<tbody>
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<row>
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<entry><filename class="directory">bin/</filename></entry>
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<entry>Source for files in
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<filename>/bin</filename></entry>
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</row>
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<row>
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<entry><filename class="directory">cddl/</filename></entry>
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<entry>Utilities covered by the Common Development and
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Distribution License</entry>
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</row>
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<row>
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<entry><filename class="directory">contrib/</filename></entry>
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<entry>Source for files from contributed software.</entry>
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</row>
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<row>
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<entry><filename class="directory">crypto/</filename></entry>
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<entry>Cryptographical sources</entry>
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</row>
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<row>
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<entry><filename class="directory">etc/</filename></entry>
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<entry>Source for files in <filename
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class="directory">/etc</filename></entry>
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</row>
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<row>
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<entry><filename class="directory">games/</filename></entry>
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<entry>Source for files in <filename
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class="directory">/usr/games</filename></entry>
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</row>
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<row>
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<entry><filename class="directory">gnu/</filename></entry>
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<entry>Utilities covered by the GNU Public License</entry>
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</row>
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<row>
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<entry><filename class="directory">include/</filename></entry>
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<entry>Source for files in <filename
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class="directory">/usr/include</filename></entry>
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</row>
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<row>
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<entry><filename
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class="directory">kerberos5/</filename></entry>
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<entry>Source for Kerberos version 5</entry>
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</row>
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<row>
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<entry><filename class="directory">lib/</filename></entry>
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<entry>Source for files in <filename
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class="directory">/usr/lib</filename></entry>
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</row>
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<row>
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<entry><filename class="directory">libexec/</filename></entry>
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<entry>Source for files in <filename
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class="directory">/usr/libexec</filename></entry>
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</row>
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<row>
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<entry><filename
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class="directory">release/</filename></entry>
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<entry>Files required to produce a FreeBSD release</entry>
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</row>
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<row>
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<entry><filename class="directory">rescue/</filename></entry>
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<entry>Build system for the
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<filename class="directory">/rescue</filename> utilities</entry>
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</row>
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<row>
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<entry><filename class="directory">sbin/</filename></entry>
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<entry>Source for files in <filename
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class="directory">/sbin</filename></entry>
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</row>
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<row>
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<entry><filename class="directory">secure/</filename></entry>
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<entry>FreeSec sources</entry>
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</row>
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<row>
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<entry><filename class="directory">share/</filename></entry>
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<entry>Source for files in <filename
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class="directory">/usr/share</filename></entry>
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</row>
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<row>
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<entry><filename class="directory">sys/</filename></entry>
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<entry>Kernel source files</entry>
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</row>
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<row>
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<entry><filename class="directory">tools/</filename></entry>
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<entry>Tools used for maintenance and testing of
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FreeBSD</entry>
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</row>
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<row>
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<entry><filename
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class="directory">usr.bin/</filename></entry>
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<entry>Source for files in <filename
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class="directory">/usr/bin</filename></entry>
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</row>
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<row>
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<entry><filename
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class="directory">usr.sbin/</filename></entry>
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<entry>Source for files in <filename
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class="directory">/usr/sbin</filename></entry>
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</row>
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</tbody>
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</tgroup>
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</informaltable>
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</para>
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</sect1>
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</chapter>
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