C///

\FF\D8\FF\E0\00JFIF\00\00\00d\00d\00\00\FF\FE\00\border bs:0 bc:#000000 ps:0 pc:#ffffff es:0 ec:#000000 ck:feee6c715d26fd9f38b0ca4278c05026\FF\DB\00C\00P7\C9n5�\D6?\BD�\9Ds\EBp\9F[`8m\B7)o\B5\E8\E6I\99\FE3]]A2\BA\8Cw\D6E\93\\DEv\C8\009\F2\F1NI?uc\\F5\EA\96k\xN<~buv\EA\C8\D7 \8B\84\CEcxI\BBg\AE\9E=\D6+n\EC\80\C8A\8C\AE\EB\CF\D5\DA\E9"2\A4\B9j5\EB\F3W\B63\96\B30Yu\DA\FC8\ED\DF\E7Ms\FB\F1\8E\B3\FA\EA\E8\E6(\883zs\F2_\8DFk\8Bh \00\8C\DCw\D3R\B5+6X\BA\B2\C4j\AB0\B4\FCMw\C2I\8E\9B\E3\A9~9u\FA\D3l\80\C8%p\EE\FDn2� \00$\FEj\C4e\A9\DB\~\95\A7\A5\80EK\BB\8DDsP\00@@AD'k\CF\E8\DB\D2(\80\9AK\D3\85\D6lb\F2\BA\8C*\80\00)\95 59\A3R:\F3\CE"\B6\80\88\00\00i1u4�\E9\F2�\A6\A2\FACM\93WMb*\E0*\00\00\00\00\00(\A8\80\00\00\80\00\00\00\00\00\00\00\00\00\FF\D9 C/// package Env; our $VERSION = '1.04'; =head1 NAME Env - perl module that imports environment variables as scalars or arrays =head1 SYNOPSIS use Env; use Env qw(PATH HOME TERM); use Env qw($SHELL @LD_LIBRARY_PATH); =head1 DESCRIPTION Perl maintains environment variables in a special hash named C<%ENV>. For when this access method is inconvenient, the Perl module C allows environment variables to be treated as scalar or array variables. The C function ties environment variables with suitable names to global Perl variables with the same names. By default it ties all existing environment variables (C) to scalars. If the C function receives arguments, it takes them to be a list of variables to tie; it's okay if they don't yet exist. The scalar type prefix '$' is inferred for any element of this list not prefixed by '$' or '@'. Arrays are implemented in terms of C and C, using C<$Config::Config{path_sep}> as the delimiter. After an environment variable is tied, merely use it like a normal variable. You may access its value @path = split(/:/, $PATH); print join("\n", @LD_LIBRARY_PATH), "\n"; or modify it $PATH .= ":."; push @LD_LIBRARY_PATH, $dir; however you'd like. Bear in mind, however, that each access to a tied array variable requires splitting the environment variable's string anew. The code: use Env qw(@PATH); push @PATH, '.'; is equivalent to: use Env qw(PATH); $PATH .= ":."; except that if C<$ENV{PATH}> started out empty, the second approach leaves it with the (odd) value "C<:.>", but the first approach leaves it with "C<.>". To remove a tied environment variable from the environment, assign it the undefined value undef $PATH; undef @LD_LIBRARY_PATH; =head1 LIMITATIONS On VMS systems, arrays tied to environment variables are read-only. Attempting to change anything will cause a warning. =head1 AUTHOR Chip Salzenberg EFE and Gregor N. Purdy EFE =cut sub import { my ($callpack) = caller(0); my $pack = shift; my @vars = grep /^[\$\@]?[A-Za-z_]\w*$/, (@_ ? @_ : keys(%ENV)); return unless @vars; @vars = map { m/^[\$\@]/ ? $_ : '$'.$_ } @vars; eval "package $callpack; use vars qw(" . join(' ', @vars) . ")"; die $@ if $@; foreach (@vars) { my ($type, $name) = m/^([\$\@])(.*)$/; if ($type eq '$') { tie ${"${callpack}::$name"}, Env, $name; } else { if ($^O eq 'VMS') { tie @{"${callpack}::$name"}, Env::Array::VMS, $name; } else { tie @{"${callpack}::$name"}, Env::Array, $name; } } } } sub TIESCALAR { bless \($_[1]); } sub FETCH { my ($self) = @_; $ENV{$$self}; } sub STORE { my ($self, $value) = @_; if (defined($value)) { $ENV{$$self} = $value; } else { delete $ENV{$$self}; } } ###################################################################### package Env::Array; use Config; use Tie::Array; @ISA = qw(Tie::Array); my $sep = $Config::Config{path_sep}; sub TIEARRAY { bless \($_[1]); } sub FETCHSIZE { my ($self) = @_; return 1 + scalar(() = $ENV{$$self} =~ /\Q$sep\E/g); } sub STORESIZE { my ($self, $size) = @_; my @temp = split($sep, $ENV{$$self}); $#temp = $size - 1; $ENV{$$self} = join($sep, @temp); } sub CLEAR { my ($self) = @_; $ENV{$$self} = ''; } sub FETCH { my ($self, $index) = @_; return (split($sep, $ENV{$$self}))[$index]; } sub STORE { my ($self, $index, $value) = @_; my @temp = split($sep, $ENV{$$self}); $temp[$index] = $value; $ENV{$$self} = join($sep, @temp); return $value; } sub EXISTS { my ($self, $index) = @_; return $index