change _NAME vars to IO::Path objects

$*PROGRAM_NAME    -> $*PROGRAM
$*EXECUTABLE_NAME -> $?COMPILER or $*SHEBANG

Author: TimToady

S19-commandline.pod

@@ -14,8 +14,8 @@ DRAFT: Synopsis 19: Command Line Interface
 
     Created: 12 Dec 2008
 
-    Last Modified: 26 Oct 2009
-    Version: 26
+    Last Modified: 27 Nov 2009
+    Version: 27
 
 This is a draft document. This document describes the command line interface.
 It has changed extensively from previous versions of Perl in order to increase
@@ -67,9 +67,9 @@ containing whitespace must be quoted. The I<program> processes the arguments
 and performs the requested actions. It looks something like F</usr/bin/perl6>,
 F<parrot perl6.pbc>, or F<rakudo> (or F<mono niecza.exe>, et cetera),
 and is followed by zero or more I<arguments>.
-Perl 6 does not do any processing of the I<program> portion of the command
-line, but it is made available at run-time via the C<< PROCESS::<$PROGRAM_NAME> >>
-variable.
+The I<program> portion of the command
+line is made available at run-time via the C<< PROCESS::<$PROGRAM> >>
+variable (normally accessed as C<$*PROGRAM>) as an C<IO::Path>.
 
 Command line I<arguments> are broken down into I<options> and I<values>.
 Each option may take zero or more values. After all options have been

S28-special-names.pod

@@ -14,8 +14,8 @@
 
     Created: 23 Feb 2009, created by Tim Nelson from miscellaneous documents lying around
 
-    Last Modified: 11 Jun 2013
-    Version: 11
+    Last Modified: 27 Nov 2013
+    Version: 12
 
 =head1 Special Variables
 
@@ -89,7 +89,8 @@ be fleshed out in S26.
  %*ENV             S02   Hash of Str  # system environment variables
  $*ERR             S16   IO::Handle   # Standard error handle
  $*EUID                  Int          # effective user id
- $*EXECUTABLE_NAME       Str          # executable name
+ $?COMPILER              IO::Path     # location of the compiler executable
+ $*SHEBANG               IO::Path     # location of the interpreter executable (usually eqv $?COMPILER)
  $?FILE            S02   Str          # current filename of source file
  $?GRAMMAR         S02   Grammar      # current grammar
  $*GID                   Int          # group id
@@ -110,7 +111,7 @@ be fleshed out in S26.
  $*PERL            S02   Application  # perl version running under
  $*PID                   Int          # system process id
  %=pod             S02                # (or some such)
- $*PROGRAM_NAME    S19   Str          # name of the Perl program being executed
+ $*PROGRAM         S19   IO::Path     # location of the Perl program being executed
  %*PROTOCOLS       S16   Hash of Method # Stores the methods needed for the uri() function
  ::?ROLE                 Str          # current role (as package or type name)
  $?ROLE            S02   Role         # current role
@@ -188,7 +189,7 @@ If a column has a "-" in it, it means that item is unavailable in that version o
  $( $GID             $*GID          Real GID (Group ID)
  $> $EUID            $*EUID         Effective UID
  $) $EGID            $*EGID         Effective GID
- $0 $PROGRAM_NAME    $*PROGRAM_NAME
+ $0 $PROGRAM_NAME    $*PROGRAM (plus stringification)
  $^C $COMPILING      $*COMPILING
  $^D $DEBUGGING      $*DEBUGGING
  $^F $SYS_FD_MAX     $*SYS_FD_MAX   ...or some such
@@ -201,7 +202,7 @@ If a column has a "-" in it, it means that item is unavailable in that version o
  $^V $]              $?PERL.version
  $^W                 $*WARNINGS (if any dynamic control needed)
  ${^WARNING_BITS}    $?WARNINGS
- $^X                 $*EXECUTABLE_NAME ...or some such
+ $^X                 $?COMPILER or $*SHEBANG (plus stringification)
  ARGV                $*ARGFILES     Note the P6 idiom for this handle:
                                     for lines() {
                                       # each time through loop