perlplan9.html
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<h1><a>perlplan9 - Plan 9-specific documentation for Perl</a></h1>
<p><a name="__index__"></a></p>
<!-- INDEX BEGIN -->
<ul>
<li><a href="#name">NAME</a></li>
<li><a href="#description">DESCRIPTION</a></li>
<ul>
<li><a href="#invoking_perl">Invoking Perl</a></li>
<li><a href="#what_s_in_plan_9_perl">What's in Plan 9 Perl</a></li>
<li><a href="#what_s_not_in_plan_9_perl">What's not in Plan 9 Perl</a></li>
<li><a href="#perl5_functions_not_currently_supported_in_plan_9_perl">Perl5 Functions not currently supported in Plan 9 Perl</a></li>
<li><a href="#signals_in_plan_9_perl">Signals in Plan 9 Perl</a></li>
</ul>
<li><a href="#compiling_and_installing_perl_on_plan_9">COMPILING AND INSTALLING PERL ON PLAN 9</a></li>
<ul>
<li><a href="#installing_perl_documentation_on_plan_9">Installing Perl Documentation on Plan 9</a></li>
</ul>
<li><a href="#bugs">BUGS</a></li>
<li><a href="#revision_date">Revision date</a></li>
<li><a href="#author">AUTHOR</a></li>
</ul>
<!-- INDEX END -->
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<p>
</p>
<h1><a name="name">NAME</a></h1>
<p>perlplan9 - Plan 9-specific documentation for Perl</p>
<p>
</p>
<hr />
<h1><a name="description">DESCRIPTION</a></h1>
<p>These are a few notes describing features peculiar to
Plan 9 Perl. As such, it is not intended to be a replacement
for the rest of the Perl 5 documentation (which is both
copious and excellent). If you have any questions to
which you can't find answers in these man pages, contact
Luther Huffman at <a href="mailto:lutherh@stratcom.com">lutherh@stratcom.com</a> and we'll try to
answer them.</p>
<p>
</p>
<h2><a name="invoking_perl">Invoking Perl</a></h2>
<p>Perl is invoked from the command line as described in
<a href="../../lib/Pod/perl.html">the perl manpage</a>. Most perl scripts, however, do have a first line
such as "#!/usr/local/bin/perl". This is known as a shebang
(shell-bang) statement and tells the OS shell where to find
the perl interpreter. In Plan 9 Perl this statement should be
"#!/bin/perl" if you wish to be able to directly invoke the
script by its name.
Alternatively, you may invoke perl with the command "Perl"
instead of "perl". This will produce Acme-friendly error
messages of the form "filename:18".</p>
<p>Some scripts, usually identified with a *.PL extension, are
self-configuring and are able to correctly create their own
shebang path from config information located in Plan 9
Perl. These you won't need to be worried about.</p>
<p>
</p>
<h2><a name="what_s_in_plan_9_perl">What's in Plan 9 Perl</a></h2>
<p>Although Plan 9 Perl currently only provides static
loading, it is built with a number of useful extensions.
These include Opcode, FileHandle, Fcntl, and POSIX. Expect
to see others (and DynaLoading!) in the future.</p>
<p>
</p>
<h2><a name="what_s_not_in_plan_9_perl">What's not in Plan 9 Perl</a></h2>
<p>As mentioned previously, dynamic loading isn't currently
available nor is MakeMaker. Both are high-priority items.</p>
<p>
</p>
<h2><a name="perl5_functions_not_currently_supported_in_plan_9_perl">Perl5 Functions not currently supported in Plan 9 Perl</a></h2>
<p>Some, such as <a href="../../lib/Pod/perlfunc.html#item_chown"><code>chown</code></a> and <a href="../../lib/Pod/perlfunc.html#item_umask"><code>umask</code></a> aren't provided
because the concept does not exist within Plan 9. Others,
such as some of the socket-related functions, simply
haven't been written yet. Many in the latter category
may be supported in the future.</p>
<p>The functions not currently implemented include:</p>
<pre>
chown, chroot, dbmclose, dbmopen, getsockopt,
setsockopt, recvmsg, sendmsg, getnetbyname,
getnetbyaddr, getnetent, getprotoent, getservent,
sethostent, setnetent, setprotoent, setservent,
endservent, endnetent, endprotoent, umask</pre>
<p>There may be several other functions that have undefined
behavior so this list shouldn't be considered complete.</p>
<p>
</p>
<h2><a name="signals_in_plan_9_perl">Signals in Plan 9 Perl</a></h2>
<p>For compatibility with perl scripts written for the Unix
environment, Plan 9 Perl uses the POSIX signal emulation
provided in Plan 9's ANSI POSIX Environment (APE). Signal stacking
isn't supported. The signals provided are:</p>
<pre>
SIGHUP, SIGINT, SIGQUIT, SIGILL, SIGABRT,
SIGFPE, SIGKILL, SIGSEGV, SIGPIPE, SIGPIPE, SIGALRM,
SIGTERM, SIGUSR1, SIGUSR2, SIGCHLD, SIGCONT,
SIGSTOP, SIGTSTP, SIGTTIN, SIGTTOU</pre>
<p>
</p>
<hr />
<h1><a name="compiling_and_installing_perl_on_plan_9">COMPILING AND INSTALLING PERL ON PLAN 9</a></h1>
<p>WELCOME to Plan 9 Perl, brave soul!</p>
<pre>
This is a preliminary alpha version of Plan 9 Perl. Still to be
implemented are MakeMaker and DynaLoader. Many perl commands are
missing or currently behave in an inscrutable manner. These gaps will,
with perseverance and a modicum of luck, be remedied in the near
future.To install this software:</pre>
<p>1. Create the source directories and libraries for perl by running the
plan9/setup.rc command (i.e., located in the plan9 subdirectory).
Note: the setup routine assumes that you haven't dearchived these
files into /sys/src/cmd/perl. After running setup.rc you may delete
the copy of the source you originally detarred, as source code has now
been installed in /sys/src/cmd/perl. If you plan on installing perl
binaries for all architectures, run "setup.rc -a".</p>
<p>2. After making sure that you have adequate privileges to build system
software, from /sys/src/cmd/perl/5.00301 (adjust version
appropriately) run:</p>
<pre>
mk install</pre>
<p>If you wish to install perl versions for all architectures (68020,
mips, sparc and 386) run:</p>
<pre>
mk installall</pre>
<p>3. Wait. The build process will take a *long* time because perl
bootstraps itself. A 75MHz Pentium, 16MB RAM machine takes roughly 30
minutes to build the distribution from scratch.</p>
<p>
</p>
<h2><a name="installing_perl_documentation_on_plan_9">Installing Perl Documentation on Plan 9</a></h2>
<p>This perl distribution comes with a tremendous amount of
documentation. To add these to the built-in manuals that come with
Plan 9, from /sys/src/cmd/perl/5.00301 (adjust version appropriately)
run:</p>
<pre>
mk man</pre>
<p>To begin your reading, start with:</p>
<pre>
man perl</pre>
<p>This is a good introduction and will direct you towards other man
pages that may interest you.</p>
<p>(Note: "mk man" may produce some extraneous noise. Fear not.)</p>
<p>
</p>
<hr />
<h1><a name="bugs">BUGS</a></h1>
<p>"As many as there are grains of sand on all the beaches of the
world . . ." - Carl Sagan</p>
<p>
</p>
<hr />
<h1><a name="revision_date">Revision date</a></h1>
<p>This document was revised 09-October-1996 for Perl 5.003_7.</p>
<p>
</p>
<hr />
<h1><a name="author">AUTHOR</a></h1>
<p>Direct questions, comments, and the unlikely bug report (ahem) direct
comments toward:</p>
<p>Luther Huffman, <a href="mailto:lutherh@stratcom.com,">lutherh@stratcom.com,</a>
Strategic Computer Solutions, Inc.</p>
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