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#!/usr/bin/perl
    eval 'exec /usr/bin/perl -S $0 ${1+"$@"}'
	if $running_under_some_shell;
#!/usr/bin/perl
use strict;

use File::Find;
use Getopt::Std;
use Archive::Tar;
use Data::Dumper;

my $opts = {};
getopts('Ddcvzthxf:I', $opts) or die usage();

### show the help message ###
die usage() if $opts->{h};

### enable debugging (undocumented feature)
local $Archive::Tar::DEBUG                  = 1 if $opts->{d};

### enable insecure extracting.
local $Archive::Tar::INSECURE_EXTRACT_MODE  = 1 if $opts->{I};

### sanity checks ###
unless ( 1 == grep { defined $opts->{$_} } qw[x t c] ) {
    die "You need exactly one of 'x', 't' or 'c' options: " . usage();
}

my $compress    = $opts->{z} ? 1 : 0;
my $verbose     = $opts->{v} ? 1 : 0;
my $file        = $opts->{f} ? $opts->{f} : 'default.tar';
my $tar         = Archive::Tar->new();


if( $opts->{c} ) {
    my @files;
    find( sub { push @files, $File::Find::name;
                print $File::Find::name.$/ if $verbose }, @ARGV );

    if ($file eq '-') {
        use IO::Handle;
        $file = IO::Handle->new();
        $file->fdopen(fileno(STDOUT),"w");
    }

    Archive::Tar->create_archive( $file, $compress, @files );

} else {
    if ($file eq '-') {
        use IO::Handle;
        $file = IO::Handle->new();
        $file->fdopen(fileno(STDIN),"r");
    }

    ### print the files we're finding?
    my $print = $verbose || $opts->{'t'} || 0;

    my $iter = Archive::Tar->iter( $file );
        
    while( my $f = $iter->() ) {
        print $f->full_path . $/ if $print;

        ### data dumper output
        print Dumper( $f ) if $opts->{'D'};
        
        ### extract it
        $f->extract if $opts->{'x'};
    }
}

### pod & usage in one
sub usage {
    my $usage .= << '=cut';
=pod

=head1 NAME

    ptar - a tar-like program written in perl

=head1 DESCRIPTION

    ptar is a small, tar look-alike program that uses the perl module
    Archive::Tar to extract, create and list tar archives.

=head1 SYNOPSIS

    ptar -c [-v] [-z] [-f ARCHIVE_FILE | -] FILE FILE ...
    ptar -x [-v] [-z] [-f ARCHIVE_FILE | -]
    ptar -t [-z] [-f ARCHIVE_FILE | -]
    ptar -h

=head1 OPTIONS

    c   Create ARCHIVE_FILE or STDOUT (-) from FILE
    x   Extract from ARCHIVE_FILE or STDIN (-)
    t   List the contents of ARCHIVE_FILE or STDIN (-)
    f   Name of the ARCHIVE_FILE to use. Default is './default.tar'
    z   Read/Write zlib compressed ARCHIVE_FILE (not always available)
    v   Print filenames as they are added or extraced from ARCHIVE_FILE
    h   Prints this help message

=head1 SEE ALSO

    tar(1), L<Archive::Tar>.

=cut

    ### strip the pod directives
    $usage =~ s/=pod\n//g;
    $usage =~ s/=head1 //g;
    
    ### add some newlines
    $usage .= $/.$/;
    
    return $usage;
}