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<H1>Sys::Hostname::Long</H1>
Section: User Contributed Perl Documentation (3pm)<BR>Updated: 2015-05-10<BR><A HREF="#index">Index</A>
<A HREF="/cgi-bin/man/man2html">Return to Main Contents</A><HR>
<A NAME="lbAB">&nbsp;</A>
<H2>NAME</H2>
Sys::Hostname::Long - Try every conceivable way to get full hostname
<A NAME="lbAC">&nbsp;</A>
<H2>SYNOPSIS</H2>
<PRE>
use Sys::Hostname::Long;
$host_long = hostname_long;
</PRE>
<A NAME="lbAD">&nbsp;</A>
<H2>DESCRIPTION</H2>
How to get the host full name in perl on multiple operating systems (mac,
windows, unix* etc)
<A NAME="lbAE">&nbsp;</A>
<H2>DISCUSSION</H2>
This is the <FONT SIZE="-1">SECOND</FONT> release of this code. It has an improved set of tests and
improved interfaces - but it is still often failing to get a full host name.
This of course is the reason I wrote the module, it is difficult to get full
host names accurately on each system. On some systems (eg: Linux) it is
dependent on the order of the entries in /etc/hosts.
<P>
To make it easier to test I have testall.pl to generate an output list of all
methods. Thus even if the logic is incorrect, it may be possible to get the
full name.
<P>
Attempt via many methods to get the systems full name. The Sys::Hostname
class is the best and standard way to get the system hostname. However it is
missing the long hostname.
<P>
Special thanks to <B>David Sundstrom</B> and <B>Greg Bacon</B> for the original
Sys::Hostname
<A NAME="lbAF">&nbsp;</A>
<H2>SUPPORT</H2>
This is the original list of platforms tested.
<P>
<PRE>
MacOS Macintosh Classic OK
Win32 MS Windows (95,98,nt,2000...)
98 OK
MacOS X Macintosh 10 OK
(other darwin) Probably OK (not tested)
Linux Linux UNIX OS OK
Sparc OK
HPUX H.P. Unix 10? Not Tested
Solaris SUN Solaris 7? OK (now)
Irix SGI Irix 5? Not Tested
FreeBSD FreeBSD OK
</PRE>
<P>
A new list has now been compiled of all the operating systems so that I can
individually keep information on their success.
<P>
<FONT SIZE="-1">THIS IS IN NEED OF AN UPDATE AFTER NEXT RELEASE.</FONT>
<DL COMPACT>
<DT id="1">Acorn - Not yet tested<DD>
<DT id="2"><FONT SIZE="-1">AIX -</FONT> Not yet tested<DD>
<DT id="3">Amiga - Not yet tested<DD>
<DT id="4">Atari - Not yet tested<DD>
<DT id="5">AtheOS - Not yet tested<DD>
<DT id="6">BeOS - Not yet tested<DD>
<DT id="7"><FONT SIZE="-1">BSD -</FONT> Not yet tested<DD>
<DT id="8"><FONT SIZE="-1">BSD/OS -</FONT> Not yet tested<DD>
<DT id="9">Compaq - Not yet tested<DD>
<DT id="10">Cygwin - Not yet tested<DD>
<DT id="11">Concurrent - Not yet tested<DD>
<DT id="12"><FONT SIZE="-1">DG/UX -</FONT> Not yet tested<DD>
<DT id="13">Digital - Not yet tested<DD>
<DT id="14"><FONT SIZE="-1">DEC OSF/1 -</FONT> Not yet tested<DD>
<DT id="15">Digital <FONT SIZE="-1">UNIX -</FONT> Not yet tested<DD>
<DT id="16">DYNIX/ptx - Not yet tested<DD>
<DT id="17"><FONT SIZE="-1">EPOC -</FONT> Not yet tested<DD>
<DT id="18">FreeBSD - Not yet tested<DD>
<DT id="19">Fujitsu-Siemens - Not yet tested<DD>
<DT id="20">Guardian - Not yet tested<DD>
<DT id="21"><FONT SIZE="-1">HP -</FONT> Not yet tested<DD>
<DT id="22">HP-UX - Not yet tested<DD>
<DT id="23"><FONT SIZE="-1">IBM -</FONT> Not yet tested<DD>
<DT id="24"><FONT SIZE="-1">IRIX -</FONT> Not yet tested - 3rd hand information might be ok.<DD>
<DT id="25">Japanese - Not yet tested<DD>
<DT id="26">JPerl - Not yet tested<DD>
<DT id="27">Linux<DD>
<DL COMPACT><DT id="28"><DD>
<DL COMPACT>
<DT id="29">Debian - Not yet tested<DD>
<DT id="30">Gentoo - Not yet tested<DD>
<DT id="31">Mandrake - Not yet tested<DD>
<DT id="32">Red Hat- Not yet tested<DD>
<DT id="33">Slackware - Not yet tested<DD>
<DT id="34">SuSe - Not yet tested<DD>
<DT id="35">Yellowdog - Not yet tested<DD>
</DL>
</DL>
<DL COMPACT><DT id="36"><DD>
</DL>
<DT id="37">LynxOS - Not yet tested<DD>
<DT id="38">Mac <FONT SIZE="-1">OS -</FONT> Not yet tested<DD>
<DT id="39">Mac <FONT SIZE="-1">OS X - OK 20040315 </FONT>(v1.1)<DD>
<DT id="40">MachTen - Not yet tested<DD>
<DT id="41">Minix - Not yet tested<DD>
<DT id="42">MinGW - Not yet tested<DD>
<DT id="43">MiNT - Not yet tested<DD>
<DT id="44">MPE/iX - Not yet tested<DD>
<DT id="45">MS-DOS - Not yet tested<DD>
<DT id="46"><FONT SIZE="-1">MVS -</FONT> Not yet tested<DD>
<DT id="47">NetBSD - Not yet tested<DD>
<DT id="48">NetWare - Not yet tested<DD>
<DT id="49">NEWS-OS - Not yet tested<DD>
<DT id="50">NextStep - Not yet tested<DD>
<DT id="51">Novell - Not yet tested<DD>
<DT id="52">NonStop - Not yet tested<DD>
<DT id="53">NonStop-UX - Not yet tested<DD>
<DT id="54">OpenBSD - Not yet tested<DD>
<DT id="55"><FONT SIZE="-1">ODT -</FONT> Not yet tested<DD>
<DT id="56">OpenVMS - Not yet tested<DD>
<DT id="57">Open <FONT SIZE="-1">UNIX -</FONT> Not yet tested<DD>
<DT id="58"><FONT SIZE="-1">OS/2 -</FONT> Not yet tested<DD>
<DT id="59"><FONT SIZE="-1">OS/390 -</FONT> Not yet tested<DD>
<DT id="60"><FONT SIZE="-1">OS/400 -</FONT> Not yet tested<DD>
<DT id="61"><FONT SIZE="-1">OSF/1 -</FONT> Not yet tested<DD>
<DT id="62"><FONT SIZE="-1">OSR -</FONT> Not yet tested<DD>
<DT id="63">Plan 9 - Not yet tested<DD>
<DT id="64">Pocket <FONT SIZE="-1">PC -</FONT> Not yet tested<DD>
<DT id="65">PowerMAX - Not yet tested<DD>
<DT id="66">Psion - Not yet tested<DD>
<DT id="67"><FONT SIZE="-1">QNX</FONT><DD>
<DL COMPACT><DT id="68"><DD>
<DL COMPACT>
<DT id="69">4 - Not yet tested<DD>
<DT id="70">6 (Neutrino) - Not yet tested<DD>
</DL>
</DL>
<DL COMPACT><DT id="71"><DD>
</DL>
<DT id="72">Reliant <FONT SIZE="-1">UNIX -</FONT> Not yet tested<DD>
<DT id="73"><FONT SIZE="-1">RISCOS -</FONT> Not yet tested<DD>
<DT id="74"><FONT SIZE="-1">SCO -</FONT> Not yet tested<DD>
<DT id="75"><FONT SIZE="-1">SGI -</FONT> Not yet tested<DD>
<DT id="76">Symbian - Not yet tested<DD>
<DT id="77">Sequent - Not yet tested<DD>
<DT id="78">Siemens - Not yet tested<DD>
<DT id="79"><FONT SIZE="-1">SINIX -</FONT> Not yet tested<DD>
<DT id="80">Solaris - Not yet tested<DD>
<DT id="81"><FONT SIZE="-1">SONY -</FONT> Not yet tested<DD>
<DT id="82">Sun - Not yet tested<DD>
<DT id="83">Stratus - Not yet tested<DD>
<DT id="84">Tandem - Not yet tested<DD>
<DT id="85">Tru64 - Not yet tested<DD>
<DT id="86">Ultrix - Not yet tested<DD>
<DT id="87"><FONT SIZE="-1">UNIX -</FONT> Not yet tested<DD>
<DT id="88">U/WIN - Not yet tested<DD>
<DT id="89">Unixware - Not yet tested<DD>
<DT id="90"><FONT SIZE="-1">VMS -</FONT> Not yet tested<DD>
<DT id="91"><FONT SIZE="-1">VOS -</FONT> Not yet tested<DD>
<DT id="92">Windows<DD>
<DL COMPACT><DT id="93"><DD>
<DL COMPACT>
<DT id="94"><FONT SIZE="-1">CE -</FONT> Not yet tested<DD>
<DT id="95">3.1 - Not yet tested<DD>
<DT id="96">95 - Not yet tested<DD>
<DT id="97">98 - Not yet tested<DD>
<DT id="98">Me - Not yet tested<DD>
<DT id="99"><FONT SIZE="-1">NT -</FONT> Not yet tested<DD>
<DT id="100">2000 - Not yet tested<DD>
<DT id="101"><FONT SIZE="-1">XP -</FONT> Not yet tested<DD>
</DL>
</DL>
<DL COMPACT><DT id="102"><DD>
</DL>
<DT id="103">z/OS - Not yet tested<DD>
</DL>
<A NAME="lbAG">&nbsp;</A>
<H2>KNOWN LIMITATIONS</H2>
<A NAME="lbAH">&nbsp;</A>
<H3>Unix</H3>
Most unix systems have trouble working out the fully qualified domain name as
it to be configured somewhere in the system correctly. For example in most
linux systems (debian, ?) the fully qualified name should be the first entry
next to the ip number in /etc/hosts
<P>
<PRE>
192.168.0.1 fred.somwhere.special fred
</PRE>
<P>
If it is the other way around, it will fail.
<A NAME="lbAI">&nbsp;</A>
<H3>Mac</H3>
<A NAME="lbAJ">&nbsp;</A>
<H2>TODO</H2>
Contributions
<P>
<PRE>
David Dick
Graeme Hart
Piotr Klaban
* Extra code from G
* Dispatch table
* List of all operating systems.
</PRE>
<P>
Solaris
<TT>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</TT>* Fall back 2 - <FONT SIZE="-1">TCP</FONT> with <FONT SIZE="-1">DNS</FONT> works ok<BR>
<TT>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</TT>* Also can read /etc/defaultdomain file<BR>
<A NAME="lbAK">&nbsp;</A>
<H2>SEE ALSO</H2>
<PRE>
L&lt;Sys::Hostname&gt;
</PRE>
<A NAME="lbAL">&nbsp;</A>
<H2>AUTHOR</H2>
Originally by Scott Penrose &lt;<I><A HREF="mailto:scottp@dd.com.au">scottp@dd.com.au</A></I>&gt;
<P>
Contributions: Michiel Beijen &lt;<I><A HREF="mailto:michiel.beijen@gmail.com">michiel.beijen@gmail.com</A></I>&gt;
<A NAME="lbAM">&nbsp;</A>
<H2>COPYRIGHT</H2>
Copyright (c) 2001,2004,2005,2015 Scott Penrose. All rights reserved.
This program is free software; you can redistribute it and/or modify
it under the same terms as Perl itself.
<P>
<HR>
<A NAME="index">&nbsp;</A><H2>Index</H2>
<DL>
<DT id="104"><A HREF="#lbAB">NAME</A><DD>
<DT id="105"><A HREF="#lbAC">SYNOPSIS</A><DD>
<DT id="106"><A HREF="#lbAD">DESCRIPTION</A><DD>
<DT id="107"><A HREF="#lbAE">DISCUSSION</A><DD>
<DT id="108"><A HREF="#lbAF">SUPPORT</A><DD>
<DT id="109"><A HREF="#lbAG">KNOWN LIMITATIONS</A><DD>
<DL>
<DT id="110"><A HREF="#lbAH">Unix</A><DD>
<DT id="111"><A HREF="#lbAI">Mac</A><DD>
</DL>
<DT id="112"><A HREF="#lbAJ">TODO</A><DD>
<DT id="113"><A HREF="#lbAK">SEE ALSO</A><DD>
<DT id="114"><A HREF="#lbAL">AUTHOR</A><DD>
<DT id="115"><A HREF="#lbAM">COPYRIGHT</A><DD>
</DL>
<HR>
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Time: 00:05:58 GMT, March 31, 2021
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