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<H1><A NAME="SECTION0010000000000000000000"> </A>
<BR>
8. Unix Specific Services
</H1>
<P>
The modules described in this chapter provide interfaces to features
that are unique to the Unix operating system, or in some cases to
some or many variants of it. Here's an overview:
<P>
<table class='synopsistable' valign='baseline'>
<tr class='oddrow'>
<td><b><tt class='module'><a href='module-posix.html'>posix</a></tt></b></td>
<td> </td>
<td class='synopsis'>The most common POSIX system calls (normally used
via module <tt class="module"><a href="module-os.html">os</a></tt>).</td></tr>
<tr><td><b><tt class='module'><a href='module-pwd.html'>pwd</a></tt></b></td>
<td> </td>
<td class='synopsis'>The password database (<tt class="function">getpwnam()</tt> and friends).</td></tr>
<tr class='oddrow'>
<td><b><tt class='module'><a href='module-grp.html'>grp</a></tt></b></td>
<td> </td>
<td class='synopsis'>The group database (<tt class="function">getgrnam()</tt> and friends).</td></tr>
<tr><td><b><tt class='module'><a href='module-crypt.html'>crypt</a></tt></b></td>
<td> </td>
<td class='synopsis'>The <tt class="cfunction">crypt()</tt> function used to check
Unix passwords.</td></tr>
<tr class='oddrow'>
<td><b><tt class='module'><a href='module-dl.html'>dl</a></tt></b></td>
<td> </td>
<td class='synopsis'>Call C functions in shared objects.</td></tr>
<tr><td><b><tt class='module'><a href='module-dbm.html'>dbm</a></tt></b></td>
<td> </td>
<td class='synopsis'>The standard ``database'' interface, based on ndbm.</td></tr>
<tr class='oddrow'>
<td><b><tt class='module'><a href='module-gdbm.html'>gdbm</a></tt></b></td>
<td> </td>
<td class='synopsis'>GNU's reinterpretation of dbm.</td></tr>
<tr><td><b><tt class='module'><a href='module-termios.html'>termios</a></tt></b></td>
<td> </td>
<td class='synopsis'>POSIX style tty control.</td></tr>
<tr class='oddrow'>
<td><b><tt class='module'><a href='module-TERMIOSuppercase.html'>TERMIOS</a></tt></b></td>
<td> </td>
<td class='synopsis'>Symbolic constants required to use the
<tt class="module">termios</tt> module.</td></tr>
<tr><td><b><tt class='module'><a href='module-tty.html'>tty</a></tt></b></td>
<td> </td>
<td class='synopsis'>Utility functions that perform common terminal control
operations.</td></tr>
<tr class='oddrow'>
<td><b><tt class='module'><a href='module-pty.html'>pty</a></tt></b></td>
<td> </td>
<td class='synopsis'>Pseudo-Terminal Handling for SGI and Linux.</td></tr>
<tr><td><b><tt class='module'><a href='module-fcntl.html'>fcntl</a></tt></b></td>
<td> </td>
<td class='synopsis'>The <tt class="function">fcntl()</tt> and <tt class="function">ioctl()</tt> system calls.</td></tr>
<tr class='oddrow'>
<td><b><tt class='module'><a href='module-pipes.html'>pipes</a></tt></b></td>
<td> </td>
<td class='synopsis'>A Python interface to Unix shell pipelines.</td></tr>
<tr><td><b><tt class='module'><a href='module-posixfile.html'>posixfile</a></tt></b></td>
<td> </td>
<td class='synopsis'>A file-like object with support for locking.</td></tr>
<tr class='oddrow'>
<td><b><tt class='module'><a href='module-resource.html'>resource</a></tt></b></td>
<td> </td>
<td class='synopsis'>An interface to provide resource usage information on
the current process.</td></tr>
<tr><td><b><tt class='module'><a href='module-nis.html'>nis</a></tt></b></td>
<td> </td>
<td class='synopsis'>Interface to Sun's NIS (Yellow Pages) library.</td></tr>
<tr class='oddrow'>
<td><b><tt class='module'><a href='module-syslog.html'>syslog</a></tt></b></td>
<td> </td>
<td class='synopsis'>An interface to the Unix syslog library routines.</td></tr>
<tr><td><b><tt class='module'><a href='module-commands.html'>commands</a></tt></b></td>
<td> </td>
<td class='synopsis'>Utility functions for running external commands.</td></tr>
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<span class="release-info">Release 2.2, documentation updated on December 21, 2001.</span>
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