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<?xml version="1.0" encoding="ISO-8859-1"?>
<!DOCTYPE sect1 PUBLIC "-//OASIS//DTD DocBook XML V4.4//EN"
"http://www.oasis-open.org/docbook/xml/4.4/docbookx.dtd" [
<!ENTITY % general-entities SYSTEM "../general.ent">
%general-entities;
]>
<sect1 id="ch-system-diffutils" role="wrap">
<?dbhtml filename="diffutils.html"?>
<title>Diffutils-&diffutils-version;</title>
<indexterm zone="ch-system-diffutils">
<primary sortas="a-Diffutils">Diffutils</primary>
</indexterm>
<sect2 role="package">
<title/>
<para>The Diffutils package contains programs that show the differences
between files or directories.</para>
<segmentedlist>
<segtitle>&buildtime;</segtitle>
<segtitle>&diskspace;</segtitle>
<seglistitem>
<seg>&diffutils-ch6-sbu;</seg>
<seg>&diffutils-ch6-du;</seg>
</seglistitem>
</segmentedlist>
</sect2>
<sect2 role="installation">
<title>Installation of Diffutils</title>
<para>POSIX requires the <command>diff</command> command to treat whitespace
characters according to the current locale. The following patch fixes the
non-compliance issue:</para>
<screen><userinput>patch -Np1 -i ../&diffutils-i18n-patch;</userinput></screen>
<para>The above patch will cause the Diffutils build system to attempt to
rebuild the <filename>diff.1</filename> man page using the unavailable
program <command>help2man</command>. The result is an unreadable man page for
<command>diff</command>. We can avoid this by updating the timestamp on
the file <filename>man/diff.1</filename>:</para>
<screen><userinput>touch man/diff.1</userinput></screen>
<para>Prepare Diffutils for compilation:</para>
<screen><userinput>./configure --prefix=/usr</userinput></screen>
<para>Compile the package:</para>
<screen><userinput>make</userinput></screen>
<para>This package does not come with a test suite.</para>
<para>Install the package:</para>
<screen><userinput>make install</userinput></screen>
</sect2>
<sect2 id="contents-diffutils" role="content">
<title>Contents of Diffutils</title>
<segmentedlist>
<segtitle>Installed programs</segtitle>
<seglistitem>
<seg>cmp, diff, diff3, and sdiff</seg>
</seglistitem>
</segmentedlist>
<variablelist>
<bridgehead renderas="sect3">Short Descriptions</bridgehead>
<?dbfo list-presentation="list"?>
<?dbhtml list-presentation="table"?>
<varlistentry id="cmp">
<term><command>cmp</command></term>
<listitem>
<para>Compares two files and reports whether or in which bytes they
differ</para>
<indexterm zone="ch-system-diffutils cmp">
<primary sortas="b-cmp">cmp</primary>
</indexterm>
</listitem>
</varlistentry>
<varlistentry id="diff">
<term><command>diff</command></term>
<listitem>
<para>Compares two files or directories and reports which lines in
the files differ</para>
<indexterm zone="ch-system-diffutils diff">
<primary sortas="b-diff">diff</primary>
</indexterm>
</listitem>
</varlistentry>
<varlistentry id="diff3">
<term><command>diff3</command></term>
<listitem>
<para>Compares three files line by line</para>
<indexterm zone="ch-system-diffutils diff3">
<primary sortas="b-diff3">diff3</primary>
</indexterm>
</listitem>
</varlistentry>
<varlistentry id="sdiff">
<term><command>sdiff</command></term>
<listitem>
<para>Merges two files and interactively outputs the results</para>
<indexterm zone="ch-system-diffutils sdiff">
<primary sortas="b-sdiff">sdiff</primary>
</indexterm>
</listitem>
</varlistentry>
</variablelist>
</sect2>
</sect1>
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