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(1,8) these man(1,5,7) pages, contact
Luther Huffman at lutherh@stratcom.com and we'll try to answer them.
Invoking Perl
Perl is invoked from the command line as described in(1,8) 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(3,n) 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(8,n) messages of the form
"filename:18".
Some scripts, usually identified with a *.PL extension, are self-con-
figuring and are able to correctly create their own shebang path from
config(1,5) information located in(1,8) Plan 9 Perl. These you won't need to be
worried about.
What's in(1,8) Plan 9 Perl
Although Plan 9 Perl currently only provides static loading, it is
built with a number of useful extensions. These include Opcode, File-
Handle, Fcntl, and POSIX. Expect to see others (and DynaLoading!) in(1,8)
the future.
What's not in(1,8) 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(1,8) Plan 9 Perl
Some, such as "chown(1,2)" 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(1,8) the latter
category may be supported in(1,8) the future.
The functions not currently implemented include:
chown(1,2), chroot(1,2), 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(1,8) Plan 9 Perl
For compatibility with perl scripts written for the Unix environment,
Plan 9 Perl uses the POSIX signal(2,7) emulation provided in(1,8) 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(1,3,5) of Plan 9 Perl. Still to be
implemented are MakeMaker and DynaLoader. Many perl commands are
missing or currently behave in(1,8) an inscrutable manner. These gaps will,
with perseverance and a modicum of luck, be remedied in(1,8) 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(1,8) the plan9 subdirectory).
Note: the setup(2,8) 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(1,8) /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(1,3,5) 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(1,2,n) because perl boot-
straps itself. A 75MHz Pentium, 16MB RAM machine takes roughly 30 min-
utes 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(1,3,5) appropriately) run:
mk man(1,5,7)
To begin your reading, start with:
man(1,5,7) perl
This is a good introduction and will direct you towards other man(1,5,7) pages
that may interest you.
(Note: "mk man(1,5,7)" 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@stratcom.com, Strategic Computer Solutions,
Inc.
perl v5.8.5 2004-04-23 PERLPLAN9(1)