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CGI.pm	255.24 KB	-rw-r--r--	2012-11-15 03:12
CPANPLUS.pm	7.05 KB	-rw-r--r--	2013-05-21 02:16
Carp.pm	19.93 KB	-rw-r--r--	2012-06-18 16:02
Digest.pm	10.35 KB	-rw-r--r--	2011-10-02 13:36
Env.pm	5.39 KB	-rw-r--r--	2013-03-02 20:40
Error.pm	24.27 KB	-rw-r--r--	2014-06-10 00:49
Expect.pm	53.44 KB	-rw-r--r--	2007-07-19 15:53
Expect.pod	42.71 KB	-rw-r--r--	2007-07-19 16:04
Exporter.pm	18.31 KB	-rw-r--r--	2013-03-27 20:04
Fatal.pm	45.16 KB	-rw-r--r--	2013-02-22 18:19
Git.pm	42.55 KB	-r--r--r--	2013-06-11 00:31
abbrev.pl	819 B	-rw-r--r--	2017-06-14 04:08
assert.pl	1.27 KB	-rw-r--r--	2017-06-14 04:08
autodie.pm	11.83 KB	-rw-r--r--	2013-02-22 18:19
bigfloat.pl	7.14 KB	-rw-r--r--	2017-06-14 04:08
bigint.pl	8.71 KB	-rw-r--r--	2017-06-14 04:08
bigrat.pl	4.35 KB	-rw-r--r--	2017-06-14 04:08
cacheout.pl	1.1 KB	-rw-r--r--	2017-06-14 04:08
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complete.pl	3.12 KB	-rw-r--r--	2017-06-14 04:08
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dotsh.pl	2.12 KB	-rw-r--r--	2017-06-14 04:08
exceptions.pl	1.7 KB	-rw-r--r--	2017-06-14 04:08
fastcwd.pl	1019 B	-rw-r--r--	2017-06-14 04:08
find.pl	1.16 KB	-rw-r--r--	2017-06-14 04:08
finddepth.pl	1.1 KB	-rw-r--r--	2017-06-14 04:08
flush.pl	642 B	-rw-r--r--	2017-06-14 04:08
ftp.pl	23.53 KB	-rw-r--r--	2017-06-14 04:08
getcwd.pl	1.37 KB	-rw-r--r--	2017-06-14 04:08
getopt.pl	1.27 KB	-rw-r--r--	2017-06-14 04:08
getopts.pl	1.35 KB	-rw-r--r--	2017-06-14 04:08
hostname.pl	727 B	-rw-r--r--	2017-06-14 04:08
importenv.pl	283 B	-rw-r--r--	2017-06-14 04:08
look.pl	1.23 KB	-rw-r--r--	2017-06-14 04:08
newgetopt.pl	2.15 KB	-rw-r--r--	2010-07-09 16:56
open2.pl	185 B	-rw-r--r--	2017-06-14 04:08
open3.pl	185 B	-rw-r--r--	2017-06-14 04:08
parent.pm	2.83 KB	-rw-r--r--	2011-03-08 20:56
perldoc.pod	8.25 KB	-rw-r--r--	2013-01-28 07:02
pwd.pl	1.44 KB	-rw-r--r--	2017-06-14 04:08
shellwords.pl	280 B	-rw-r--r--	2017-06-14 04:08
stat.pl	525 B	-rw-r--r--	2017-06-14 04:08
syslog.pl	4.69 KB	-rw-r--r--	2017-06-14 04:08
tainted.pl	164 B	-rw-r--r--	2017-06-14 04:08
termcap.pl	4.02 KB	-rw-r--r--	2017-06-14 04:08
timelocal.pl	690 B	-rw-r--r--	2017-06-14 04:08
validate.pl	3.64 KB	-rw-r--r--	2017-06-14 04:08

Rename

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<Env> allows
environment variables to be treated as scalar or array variables.

The C<Env::import()> function ties environment variables with suitable
names to global Perl variables with the same names.  By default it
ties all existing environment variables (C<keys %ENV>) to scalars.  If
the C<import> 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<split> and C<join>, 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 E<lt>F<chip@fin.uucp>E<gt>
and
Gregor N. Purdy E<lt>F<gregor@focusresearch.com>E<gt>

=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 < $self->FETCHSIZE;
}

sub DELETE {
    my ($self, $index) = @_;
    my @temp = split($sep, $ENV{$$self});
    my $value = splice(@temp, $index, 1, ());
    $ENV{$$self} = join($sep, @temp);
    return $value;
}

sub PUSH {
    my $self = shift;
    my @temp = split($sep, $ENV{$$self});
    push @temp, @_;
    $ENV{$$self} = join($sep, @temp);
    return scalar(@temp);
}

sub POP {
    my ($self) = @_;
    my @temp = split($sep, $ENV{$$self});
    my $result = pop @temp;
    $ENV{$$self} = join($sep, @temp);
    return $result;
}

sub UNSHIFT {
    my $self = shift;
    my @temp = split($sep, $ENV{$$self});
    my $result = unshift @temp, @_;
    $ENV{$$self} = join($sep, @temp);
    return $result;
}

sub SHIFT {
    my ($self) = @_;
    my @temp = split($sep, $ENV{$$self});
    my $result = shift @temp;
    $ENV{$$self} = join($sep, @temp);
    return $result;
}

sub SPLICE {
    my $self = shift;
    my $offset = shift;
    my $length = shift;
    my @temp = split($sep, $ENV{$$self});
    if (wantarray) {
	my @result = splice @temp, $offset, $length, @_;
	$ENV{$$self} = join($sep, @temp);
	return @result;
    } else {
	my $result = scalar splice @temp, $offset, $length, @_;
	$ENV{$$self} = join($sep, @temp);
	return $result;
    }
}

######################################################################

package Env::Array::VMS;
use Tie::Array;

@ISA = qw(Tie::Array);
 
sub TIEARRAY {
    bless \($_[1]);
}

sub FETCHSIZE {
    my ($self) = @_;
    my $i = 0;
    while ($i < 127 and defined $ENV{$$self . ';' . $i}) { $i++; };
    return $i;
}

sub FETCH {
    my ($self, $index) = @_;
    return $ENV{$$self . ';' . $index};
}

sub EXISTS {
    my ($self, $index) = @_;
    return $index < $self->FETCHSIZE;
}

sub DELETE { }