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PERLPLAN9(1) Perl Programmers Reference Guide PERLPLAN9(1)
NAME
perlplan9 - Plan 9-specific documentation for Perl
DESCRIPTION
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 lutherh AT stratcom.com and we'll try to answer them.
Invoking Perl
Perl is invoked from the command line as described in perl. 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".
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.
What's in Plan 9 Perl
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.
What's not in Plan 9 Perl
As mentioned previously, dynamic loading isn't currently available nor is MakeMaker. Both
are high-priority items.
Perl5 Functions not currently supported in Plan 9 Perl
Some, such as "chown" and "umask" 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.
The functions not currently implemented include:
chown, chroot, dbmclose, dbmopen, getsockopt,
setsockopt, recvmsg, sendmsg, getnetbyname,
getnetbyaddr, getnetent, getprotoent, getservent,
sethostent, setnetent, setprotoent, setservent,
endservent, endnetent, endprotoent, umask
There may be several other functions that have undefined behavior so this list shouldn't
be considered complete.
Signals in Plan 9 Perl
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:
SIGHUP, SIGINT, SIGQUIT, SIGILL, SIGABRT,
SIGFPE, SIGKILL, SIGSEGV, SIGPIPE, SIGPIPE, SIGALRM,
SIGTERM, SIGUSR1, SIGUSR2, SIGCHLD, SIGCONT,
SIGSTOP, SIGTSTP, SIGTTIN, SIGTTOU
COMPILING AND INSTALLING PERL ON PLAN 9
WELCOME to Plan 9 Perl, brave soul!
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:
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".
2. After making sure that you have adequate privileges to build system software, from
/sys/src/cmd/perl/5.00301 (adjust version appropriately) run:
mk install
If you wish to install perl versions for all architectures (68020, mips, sparc and 386)
run:
mk installall
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.
Installing Perl Documentation on Plan 9
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:
mk man
To begin your reading, start with:
man perl
This is a good introduction and will direct you towards other man pages that may interest
you.
(Note: "mk man" may produce some extraneous noise. Fear not.)
BUGS
"As many as there are grains of sand on all the beaches of the world . . ." - Carl Sagan
Revision date
This document was revised 09-October-1996 for Perl 5.003_7.
AUTHOR
Direct questions, comments, and the unlikely bug report (ahem) direct comments toward:
Luther Huffman, lutherh AT stratcom.com, Strategic Computer Solutions, Inc.
perl v5.34.0 2023-11-23 PERLPLAN9(1)
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