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Code Editor : makedat.html

<?xml version="1.0"?>
<html xmlns="http://www.w3.org/1999/xhtml"><head><meta http-equiv="Content-Type" content="text/html; charset=UTF-8"/><title>makedat</title><link rel="stylesheet" type="text/css" href="style.css"/><meta name="generator" content="DocBook XSL Stylesheets V1.78.1"/><link rel="home" href="#idm255219627840" title="makedat"/><link xmlns="" rel="stylesheet" type="text/css" href="manpage.css"/><meta xmlns="" name="MSSmartTagsPreventParsing" content="TRUE"/><link xmlns="" rel="icon" href="icon.gif" type="image/gif"/><!--

--></head><body><div class="refentry"><a id="idm255219627840" shape="rect"> </a><div class="titlepage"/><div class="refnamediv"><h2>Name</h2><p>makedat — create GDBM/DB files for maildrop</p></div><div class="refsynopsisdiv"><h2>Synopsis</h2><div class="cmdsynopsis"><p><code class="command">makedat</code>  {-src=<em class="replaceable"><code>textfile</code></em>} {-tmp=<em class="replaceable"><code>tmpfile</code></em>} {-file=<em class="replaceable"><code>gdbmfile</code></em>} [-cidr]</p></div></div><div class="refsect1"><a id="idm255220996240" shape="rect"> </a><h2>DESCRIPTION</h2><p>
The gdbm family of functions in <span class="command"><strong>maildrop</strong></span> provides access
to GDBM/DB databases - simple database files. The gdbm family of functions
provide a way of quickly storing and looking up key/data pairs.</p><p>
You can use any program to create GDBM/DB database files.
<span class="command"><strong>makedat</strong></span> is a quick utility to create GDBM or DB files from
plain text files.</p><p>
The system administrator selects whether <span class="command"><strong>maildrop</strong></span> uses
GDBM or DB
database files and whether <span class="command"><strong>makedat</strong></span> creates GDBM or DB
database files as well.</p><p>
The <span class="command"><strong>makedat</strong></span> command may not be available to you. GDBM/DB
support in <span class="command"><strong>maildrop</strong></span> is optional, and the system
administrator may choose not to
install GDBM/DB support and the <span class="command"><strong>makedat</strong></span> command.</p><p>
To see whether GDBM or DB support is being used, run the command
"<span class="command"><strong>maildrop -v</strong></span>".</p><p>
The <em class="replaceable"><code>textfile</code></em> argument to
<span class="command"><strong>makedat</strong></span> is a plain text file containing
key/value pairs. Each line in the text file contains a key value, followed by
a tab and a data value. The data value may be omitted, which
defaults to "1". For example, the following three lines:</p><div class="informalexample"><pre class="programlisting" xml:space="preserve">
example.com

domain.com&lt;tab&gt;ok

foo.domain.com&lt;tab&gt;bad
</pre></div><p>
Three key/value pairs are created: example.com, value "1"; domain.com,
value "ok", and "foo.domain.com", value "bad".</p><p>
Empty lines in <em class="replaceable"><code>textfile</code></em>, and lines starting with
the # character, are ignored.</p><p>
<em class="replaceable"><code>textfile</code></em> can be "-", in which case standard input
is used.</p><p>
<em class="replaceable"><code>gdbmfile</code></em> is the GDBM/DB file to create. If this
file exists, its existing contents are replaced.</p><p>
<em class="replaceable"><code>tmpfile</code></em> is a name of a temporary file in the same
directory as <em class="replaceable"><code>gdbmfile</code></em>.
<em class="replaceable"><code>tmpfile</code></em> is used by <span class="command"><strong>makedat</strong></span> to
create the GDBM
file, then <em class="replaceable"><code>tmpfile</code></em> is renamed to
<em class="replaceable"><code>gdbmfile</code></em>.</p><p>
This approach foregoes any need for locking in order to be able to
dynamically update GDBM/DB files used by <span class="command"><strong>maildrop</strong></span>'s gdbm functions.
However, <span class="command"><strong>makedat</strong></span> does not use any locks on <em class="replaceable"><code>tmpfile</code></em>, so multiple
instances of <span class="command"><strong>makedat</strong></span> using the same <em class="replaceable"><code>tmpfile</code></em> are prohibited.</p><p>
The <code class="option">-cidr</code> flag specifies that the key is an IP netblock in
CIDR notation. This flag requires the <span class="application">Net::CIDR</span>
Perl module to be installed separately. Download Net::CIDR from
<a class="ulink" href="http://www.cpan.org" target="_top" shape="rect">http://www.cpan.org</a>.</p></div><div class="refsect1"><a id="idm255215694592" shape="rect"> </a><h2>BUGS</h2><p>
There are historical reasons why database functions in maildrop are called
gdbm functions. The initial implementation used GDBM functions exclusively.
The ability to use the DB library instead of the GDBM library has been added
later.</p></div><div class="refsect1"><a id="idm255215693152" shape="rect"> </a><h2>EXAMPLE</h2><div class="informalexample"><pre class="programlisting" xml:space="preserve">
makedat blacklist /etc/mail/blacklist.tmp /etc/mail/blacklist.dat
</pre></div><p>
Takes <code class="filename">blacklist</code>, and creates
<code class="filename">/etc/mail/blacklist.dat</code>, using
<code class="filename">/etc/mail/blacklist.tmp</code> as a temporary file.</p></div><div class="refsect1"><a id="idm255215688736" shape="rect"> </a><h2>SEE ALSO</h2><p>
<a class="ulink" href="maildrop.html" target="_top" shape="rect"><span class="citerefentry"><span class="refentrytitle">maildrop</span>(1)</span></a>,
<a class="ulink" href="maildropgdbm.html" target="_top" shape="rect"><span class="citerefentry"><span class="refentrytitle">maildropgdbm</span>(5)</span></a>.</p></div></div></body></html>

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Code Editor : makedat.html