#!/usr/bin/perl -wT

use Getopt::Long;
use Pod::Usage;
use Carp;
use strict;
use File::Basename;

my $myname = basename($0);
$myname =~ s/\.\w*$//;    # strip any extension

$ENV{'PATH'} = join ":", qw(/bin /usr/bin /usr/local/bin /opt/sfw/bin);

my %options;
my @getopt_args = (
    'h|?',          # print usage
    'm',            # print manpage
    'u',            # print UUID
    'v',            # print version
    'w',            # print source location
    );

Getopt::Long::config("noignorecase", "bundling");
usage() unless GetOptions(\%options, @getopt_args);

manpage() if $options{'m'};
myuuid()  if $options{'u'};
version() if $options{'v'};
where()   if $options{'w'};
usage()   if $options{'h'};

# unbuffer output to make it look speedier
$|++;

while (<>) {
    chomp;
    print +(scalar reverse), "\n";
}

exit(0);

#---------------------------------------------------------------------
# Print a usage message from the comment header and exit.

sub usage {
    my ($emsg) = @_;

    use Pod::Usage qw(pod2usage);
    warn "$emsg\n" if defined $emsg;
    pod2usage(-verbose => 99, -sections => "NAME|SYNOPSIS|OPTIONS");
}

sub manpage {
    use Pod::Man();

    my $parser = Pod::Man->new();
    open(STDOUT, "| groff -T ascii -man | gcat -s | less") || die "groff\n";
    $parser->parse_from_file($0);

    close STDOUT || die "$myname: can't close stdout: $!\n";
    $? = 1 if $? == 255;    # from die
    exit($?);
}

#---------------------------------------------------------------------
# Print the UUID, current version, or source location.

sub myuuid {
    my $UUID = sprintf("%s",
        q$UUID: acbc1bec-e84e-3c37-b474-c85d15fe72e2 $ =~ /UUID: (.*) /);
    print "$UUID\n";
    exit(0);
}

sub version {
    my $VERSION = sprintf("%d.%02d", q$Revision: 1.3 $ =~ /(\d+)\.(\d+)/);
    my $DATE = sprintf("%s", q$Date: 2008/03/05 19:46:37 $ =~ /Date: (.*) /);
    print "$myname $VERSION $DATE\n";
    exit(0);
}

sub where {
    my $SOURCE = sprintf("%s",
    print "$SOURCE\n";
    exit(0);
}

#---------------------------------------------------------------------
__END__

=head1 NAME

rev - reverse lines from a file

=head1 SYNOPSIS

rev [-hmuvw] [file ...]

=head1 DESCRIPTION

B<rev> copies the specified files to stdout,
reversing the order of characters in every line.
If no files are specified, stdin is read.

=head1 OPTIONS

=over 4

=item B<-h>

Print a brief help message and exit.

=item B<-m>

Print the manual page and exit.

=item B<-u>

Print the UUID for this program and exit.

=item B<-v>

Print the version and exit.

=item B<-w>

Print the source location and exit.

=back

=head1 AUTHOR

 Karl Vogel <vogelke@pobox.com>
 Sumaria Systems, Inc.

 Based heavily on ideas from the versions in Perl Power Tools.

=cut