#!/usr/local/dist/bin/perl -w

######################################################################
###
###   IMPORTANT!
###   Please read the warranty and legal notice 
###   at the end of this file!
###
######################################################################

require 5.000;
use lib '/usr/local/bin',"$ENV{HOME}/bin",'/usr/stud/loescher/bin';
use lib 'd:/bin','c:/mydos','c:/bin';
use slutil;
use English;

######################################################################
### Voreinstellungen
######################################################################

$version = '1.12';
$appname = 'ReUnFi - RenameUnknownFiles';

######################################################################
### Hauptprogramm
######################################################################

&Hilfe if ($#ARGV<0);

printumlaute Kopf();

$SuchPuffer = "";
# Alle Argumente der Kommandozeile bearbeiten
for ($i=0; $filename=$ARGV[$i]; $i++)
{
  # Wenn das File schon eine Endung hat, dann ueberspringen
  if ($filename =~ /\./) 
  {
    print "Das File '$filename' hat bereits eine Endung!\n";
    next;
  }
  open (Ffile, "<$filename") || warn "WARNUNG: $filename kann nicht gelesen werden.\n";
  # Die ersten 100 Bytes binaer einlesen
  read (Ffile,$SuchPuffer,100);
  close Ffile;

  abfrage:
  {
    # Midi
    if ( substr($SuchPuffer,0,4) eq "MThd" )
    { umbenennen($filename, "mid"); last abfrage; }
    # Wave
    if ( substr($SuchPuffer,0,4) eq "RIFF" ) 
    { umbenennen ($filename, "wav"); last abfrage; }
    # Jpeg
    if ( substr($SuchPuffer,6,4) eq "JFIF" )
    { umbenennen ($filename, "jpg"); last abfrage; }
    # Real-Audio
    if ( substr($SuchPuffer,0,3) eq ".ra" )
    { umbenennen ($filename, "ra"); last abfrage; }

    print "$filename ist ein unbekanntes File!\n";
  }
    
} # Schleife ueber die Argumente


######################################################################
### Unterprogramme
######################################################################

sub umbenennen
{
  my ($name,$endung) = @_;
  #  system ("mv -iv $_[0] $_[0].$_[1]");
  print "Umbennennung von '$name' nach '$name.$endung'\n";
  rename $name, "$name.$endung";
};


sub Kopf
{
  my $head = "$appname $version   -   von Stephan Löscher";
  return "\n$head\n" . '~' x length($head) . "\n";
}


sub Hilfe
{
#  printumlautepaged
  printumlaute
  Kopf().
"Syntax: renunfi [ Filenamen ]

Dieses Programm stellt fest, von welchem File-Type ein File ist und
benennt das File dann um. (Aber nur, wenn das File noch keine Endung hat.)
Zur Zeit werden folgende Typen erkannt: 
jpg, mid, wav

";
exit;
}



######################################################################
#
# Warranty and legal notice
# ~~~~~~~~~~~~~~~~~~~~~~~~~
#
# Copyright (c) 1997 by Stephan Löscher  -  all rights reserved
# My Address: Stephan Löscher, Dr.Troll-str. 3, 82194 Gröbenzell, Germany
# Email: loescher@gmx.de
# WWW: http://www.loescher-online.de/
#
# This program is freeware.
# It is NOT Public-Domain-Software!
# The author (Stephan Löscher) does NOT give up his copyright, but he 
# reserves his copyright. Usage and copying is free of charge for private
# use, but NOT for commercial use!
# 
# You may and should copy this program free of charge, use it,
# give it to your friends, upload it to a BBS or something similar, under
# the following conditions:
# * Don't charge any money for it. If you upload it to a BBS, make sure that
#    it can be downloaded free (without paying for downloading it, except
#    for usage fees that have to be paid anyway). Small copying fees (up to
#    5 DM or 3 $US) may be charged.
#  * Only distribute the whole original package, with all the files included.
#  * This program may not be part of any commercial product or service without
#    the written permission by the author.
#  * If you want to include this program on a CD-ROM and/or book, please send
#    me a free copy of the CD/book (this is not a must, but I would appreciate
#    it very much).
# 
# Distribution of the program is explicitly desired, provided that the above
# conditions are accepted.
# 
# YOU ARE USING THIS PROGRAM AT YOUR OWN RISK! THE AUTHOR (STEPHAN LÖSCHER)
# IS NOT LIABLE FOR ANY DAMAGE OR DATA-LOSS CAUSED BY THE USE OF THIS PROGRAM
# OR BY THE INABILITY TO USE THIS PROGRAM. IF YOU ARE NOT SURE ABOUT THIS, OR
# IF YOU DON'T ACCEPT THIS, THEN DO NOT USE THIS PROGRAM!
# BECAUSE OF THE VARIOUS HARDWARE AND SOFTWARE ENVIRONMENTS INTO WHICH THIS
# PROGRAM MAY BE PUT, NO WARRANTY OF FITNESS FOR A PARTICULAR PURPOSE IS
# OFFERED.
# GOOD DATA PROCESSING PROCEDURE DICTATES THAT ANY PROGRAM BE THOROUGHLY
# TESTED WITH NON-CRITICAL DATA BEFORE RELYING ON IT.
# 
# No part of the documentation may be reproduced, transmitted, transcribed,
# stored in any retrieval system, or translated into any other language in
# whole or in part, in any form or by any means, whether it be electronic,
# mechanical, magnetic, optical, manual or otherwise, without prior written
# consent of the author, Stephan Löscher.
# 
# You may not make any changes or modifications to this software or this
# manual. You may not decompile, disassemble, or otherwise reverse-engineer
# the software in any way.
# If you got the source, then you are permitted to modify it if you
# contact me and tell me your enhancements.
# You also may include the source as a whole or parts of it into other
# programs, as long as you don't make profit directly out of selling
# the result. If you re-use code of this program then do not remove my name!
# If you include this source-code in your projects, mark it clearly as such
# "... derived from code XXX by Stephan Löscher".
# But don't distribute modified code!
# 
# If you believe your copy of this software has been tampered or altered in
# anyway, shape or form, please contact me immediately! Do not hesitate a
# moment to inform me. Remember, this software should be available to all, in
# the original form, so please do not accept modified or damaged versions of
# my software.
# 
# The author reserves his right for taking legal steps if the copyright or the
# license agreement is violated.
# 
# All product names mentioned in this software are trademarks or registered
# trademarks of their respective owners.
# 
# If you have any questions, ideas, suggestions for improvements or if you find
# bugs (I don't hope so.) then feel free to contact me. (Email is appreciated.)
# 
# I'm not a native english speaker. If you are one and discover some strange
# sounding parts in this documentation or in the program, please, feel free
# to point it out to me and give me suggestions for alteration!
# 
# If the program works for you, and you want to honour my efforts, you are
# invited to donate as much as you want... :)
#
# In any case, if you don't like the restrictions in this license, contact
# me, and we can work something out.
#
######################################################################