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<h1 class="title">Introduction</h1>
<p class="para">
This module contains an interface to those functions defined in
the IEEE 1003.1 (POSIX.1) standards document which are not
accessible through other means.
</p>
<div class="warning"><strong class="warning">Warning</strong>
<p class="para">
Sensitive data can be retrieved with the POSIX functions, e.g.
<span class="function"><a href="function.posix-getpwnam.html" class="function">posix_getpwnam()</a></span> and friends. None of the
POSIX function perform any kind of access
checking when <a href="ini.sect.safe-mode.html#ini.safe-mode" class="link">safe mode</a> is enabled.
It's therefore <em class="emphasis">strongly</em> advised to
disable the POSIX extension at all (use
<em>--disable-posix</em> in your configure line) if you're
operating in such an environment.
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<blockquote class="note"><p><strong class="note">Note</strong>: <span class="simpara">This extension is not
available on Windows platforms.</span></p></blockquote>
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