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database/perl/lib/pods/perlplan9.pod
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database/perl/lib/pods/perlplan9.pod
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If you read this file _as_is_, just ignore the funny characters you see.
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It is written in the POD format (see pod/perlpod.pod) which is specially
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designed to be readable as is.
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=head1 NAME
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perlplan9 - Plan 9-specific documentation for Perl
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=head1 DESCRIPTION
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These are a few notes describing features peculiar to
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Plan 9 Perl. As such, it is not intended to be a replacement
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for the rest of the Perl 5 documentation (which is both
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copious and excellent). If you have any questions to
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which you can't find answers in these man pages, contact
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Luther Huffman at lutherh@stratcom.com and we'll try to
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answer them.
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=head2 Invoking Perl
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Perl is invoked from the command line as described in
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L<perl>. Most perl scripts, however, do have a first line
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such as "#!/usr/local/bin/perl". This is known as a shebang
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(shell-bang) statement and tells the OS shell where to find
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the perl interpreter. In Plan 9 Perl this statement should be
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"#!/bin/perl" if you wish to be able to directly invoke the
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script by its name.
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Alternatively, you may invoke perl with the command "Perl"
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instead of "perl". This will produce Acme-friendly error
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messages of the form "filename:18".
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Some scripts, usually identified with a *.PL extension, are
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self-configuring and are able to correctly create their own
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shebang path from config information located in Plan 9
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Perl. These you won't need to be worried about.
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=head2 What's in Plan 9 Perl
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Although Plan 9 Perl currently only provides static
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loading, it is built with a number of useful extensions.
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These include Opcode, FileHandle, Fcntl, and POSIX. Expect
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to see others (and DynaLoading!) in the future.
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=head2 What's not in Plan 9 Perl
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As mentioned previously, dynamic loading isn't currently
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available nor is MakeMaker. Both are high-priority items.
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=head2 Perl5 Functions not currently supported in Plan 9 Perl
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Some, such as C<chown> and C<umask> aren't provided
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because the concept does not exist within Plan 9. Others,
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such as some of the socket-related functions, simply
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haven't been written yet. Many in the latter category
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may be supported in the future.
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The functions not currently implemented include:
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chown, chroot, dbmclose, dbmopen, getsockopt,
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setsockopt, recvmsg, sendmsg, getnetbyname,
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getnetbyaddr, getnetent, getprotoent, getservent,
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sethostent, setnetent, setprotoent, setservent,
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endservent, endnetent, endprotoent, umask
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There may be several other functions that have undefined
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behavior so this list shouldn't be considered complete.
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=head2 Signals in Plan 9 Perl
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For compatibility with perl scripts written for the Unix
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environment, Plan 9 Perl uses the POSIX signal emulation
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provided in Plan 9's ANSI POSIX Environment (APE). Signal stacking
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isn't supported. The signals provided are:
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SIGHUP, SIGINT, SIGQUIT, SIGILL, SIGABRT,
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SIGFPE, SIGKILL, SIGSEGV, SIGPIPE, SIGPIPE, SIGALRM,
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SIGTERM, SIGUSR1, SIGUSR2, SIGCHLD, SIGCONT,
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SIGSTOP, SIGTSTP, SIGTTIN, SIGTTOU
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=head1 COMPILING AND INSTALLING PERL ON PLAN 9
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WELCOME to Plan 9 Perl, brave soul!
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This is a preliminary alpha version of Plan 9 Perl. Still to be
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implemented are MakeMaker and DynaLoader. Many perl commands are
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missing or currently behave in an inscrutable manner. These gaps will,
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with perseverance and a modicum of luck, be remedied in the near
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future.To install this software:
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1. Create the source directories and libraries for perl by running the
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plan9/setup.rc command (i.e., located in the plan9 subdirectory).
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Note: the setup routine assumes that you haven't dearchived these
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files into /sys/src/cmd/perl. After running setup.rc you may delete
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the copy of the source you originally detarred, as source code has now
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been installed in /sys/src/cmd/perl. If you plan on installing perl
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binaries for all architectures, run "setup.rc -a".
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2. After making sure that you have adequate privileges to build system
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software, from /sys/src/cmd/perl/5.00301 (adjust version
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appropriately) run:
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mk install
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If you wish to install perl versions for all architectures (68020,
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mips, sparc and 386) run:
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mk installall
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3. Wait. The build process will take a *long* time because perl
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bootstraps itself. A 75MHz Pentium, 16MB RAM machine takes roughly 30
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minutes to build the distribution from scratch.
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=head2 Installing Perl Documentation on Plan 9
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This perl distribution comes with a tremendous amount of
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documentation. To add these to the built-in manuals that come with
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Plan 9, from /sys/src/cmd/perl/5.00301 (adjust version appropriately)
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run:
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mk man
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To begin your reading, start with:
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man perl
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This is a good introduction and will direct you towards other man
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pages that may interest you.
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(Note: "mk man" may produce some extraneous noise. Fear not.)
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=head1 BUGS
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"As many as there are grains of sand on all the beaches of the
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world . . ." - Carl Sagan
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=head1 Revision date
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This document was revised 09-October-1996 for Perl 5.003_7.
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=head1 AUTHOR
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Direct questions, comments, and the unlikely bug report (ahem) direct
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comments toward:
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Luther Huffman, lutherh@stratcom.com,
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Strategic Computer Solutions, Inc.
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