#!/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     = '0.3';
$appname     = 'AutoFTPGet';
$logfilename = "$ENV{HOME}/$appname.log";

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

&Hilfe if ($#ARGV<2);

printumlaute Kopf();

die "Kann 'ftp' nicht finden!\n"   unless which('ftp');

# Die Eingaben:
$host = $ARGV[0];
$path = $ARGV[1]; KillSlashAtEnd($path); $path .= $slash;
$file = $ARGV[2];

# Log-File öffnen
open (LogFile, ">>$logfilename") || die "Kann Logfile nicht schreiben!\n";
select(LogFile); $|=1; select(STDOUT); # LOG-File nicht puffern

$datum = date."\n";
print LogFile "\nStart von $appname (PID: $$) um $datum";
print LogFile "Mit folgenden Parametern: \L$appname\E @ARGV\n";

# Signal-Handler
sub catch_signal 
{
  my $signame = shift;
  $datum = date."\n";
  print LogFile "Ende von $appname wegen Signal SIG$signame um $datum";
  exit;
}

$SIG{HUP}  = \&catch_signal;   #1 : Hangup detected on controlling terminal or death of controlling process
$SIG{INT}  = \&catch_signal;   #2 : Interrupt from keyboard
$SIG{QUIT} = \&catch_signal;   #3 : Quit from keyboard
$SIG{ABRT} = \&catch_signal;   #6 : Abort signal from abort(3)
$SIG{KILL} = \&catch_signal;   #9 : Kill signal
$SIG{TERM} = \&catch_signal;   #15: Termination signal


# Filegröße feststellen (mit ftp und Kommando SIZE)

# Existiert ein ~/.netrc?
if (-e "$ENV{HOME}/.netrc")
{
  @input = ("open $host\n",
	    "binary\n",
	    "size $path$file\n",
	    "quit\n"
	   );
}
else
{
  printumlaute 'Bitte erstellen ein File ~/.netrc für anonymous ',
  "Login.\nInformationen siehe: Anleitung zu 'ftp'.\n",
  "Beipsiel: default login anonymous password loescher\@gmx.de\n\n";
  exit;
}  

open (FTP, "echo '@input' | ftp -v |");
@result = <FTP>;
@return213 = grep(/^213/, @result);
$remoteSize = $return213[0];
$remoteSize =~ s/^213\D+(\d+)/$1/;

if ( -e $file ) { $localSize = (stat($file))[7]; }
else            { $localSize = 0;                }

print LogFile "Erstmaliger FTP-Start:\n";

if ( $localSize == $remoteSize )
  { print LogFile "Das File ist schon im voller Laenge vorhanden. Abbruch.\n"; }

while ($localSize < $remoteSize)
{
  print LogFile "Datei: $file, Lokal: $localSize, Remote: $remoteSize\n";
  $datum = date."\n";
  print LogFile "FTP gestartet um $datum";

  # Mit ncftp:   system ("ncftp -C $host:$path$file");
  # Ohne ncftp:
  $getkommando = ( (-e $file) ? "reget" : "get");
  print $getkommando."\n";
  @input = ("open $host\n",
	    "binary\n",
	    "$getkommando $path$file $file\n",
	    "quit\n"
	   );
  system("echo '@input' | ftp");
  
  $datum = date."\n";
  print LogFile "FTP beendet um $datum";
  if ( -e $file ) { $localSize = (stat($file))[7]; }
  else            { $localSize = 0;                }
}


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

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


sub Hilfe
{
  printumlaute
  Kopf().
"Syntax: autoftpget host path file 

Es wird eine Datei per FTP transferiert und bei Abbrüchen per REGET erneut
versucht bis die Datei komplett empfangen ist.

Beispiel: autoftpget ftp.leo.org /pub/comp/platforms/ index.txt
Alle Aktivitäten werden in ~/AutoFTPGet.log protokolliert.

";
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.
#
######################################################################