todo.html


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<?xml version="1.0" encoding="ISO-8859-1"?>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"
    "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<link rev="made" href="mailto:esr@snark.thyrsus.com" />
<meta name="description"
content="Known bugs and to-do items in fetchmail" />
<meta name="keywords" content="fetchmail, POP3, IMAP, bugs" />
<title>Fetchmail Bugs and To-Do Items</title>
<style type="text/css">
/*<![CDATA[*/
 h1.c1 {text-align: center}
/*]]>*/
</style>
</head>
<body>
<h1 class="c1">Fetchmail Bugs and To-Do Items</h1>

<p>I try to respond to urgent bug reports in a timely way. But
fetchmail is now pretty mature and I have many other projects, so I
don't personally chase obscure or marginal problems. Help with any
of these will be cheerfully accepted.</p>

<h2>Serious</h2>

<p>SSL trust model violation: (Brian Candler)
<a
	href="http://lists.ccil.org/pipermail/fetchmail-friends/2004-April/008516.html">http://lists.ccil.org/pipermail/fetchmail-friends/2004-April/008516.html</a></p>

<p>Let IMAP code use UID and UIDVALIDITY rather than relying on flags
that everyone can alter.</p>

<h2>Normal</h2>

<p>POP3 hang when polling mail with NUL char that is rejected (David
Greaves) <a
	href="https://lists.berlios.de/pipermail/fetchmail-devel/2004-October/000154.html">https://lists.berlios.de/pipermail/fetchmail-devel/2004-October/000154.html</a></p>

<p>Remove spaces after MAIL FROM: or RCPT TO: et al. in BSMTP output
(sink.c)</p>

<p>It has been reported that multidrop name matching fails when the
name to be matched contains a Latin-1 umlaut. Dollars to doughnuts
this is some kind of character sign-extension problem. Trouble is,
it's very likely in the BIND libraries. Someone should go in with a
debugger and check this.</p>

<p>Move everything to using service strings rather that port
numbers, so we can get rid of ENABLE_INET6 everywhere but in
SockOpen (this will get rid of the kluge in rcfile_y.y).</p>

<p>The <a
href="http://bugs.debian.org/cgi-bin/pkgreport.cgi?pkg=fetchmail&amp;archive=no">
Debian bug-tracking page for fetchmail</a> lists other bug
reports.</p>

<h2>Cosmetic</h2>

<p>SSL validation prints CommonName mismatch more than once.</p>

<p>Alan Munday suggests message change MULTIDROP without ENVELOPE:</p>
<pre>
fetchmail: warning: MULTIDROP configuration for pop.example.org requires the envelope option to be set!
fetchmail: warning: Check ENVELOPE option if fetchmail sends all mail to postmaster!
</pre>

<h2>Feature requests/Wishlist items</h2>

<p>Feature request from "Ralf G. R. Bergs" &lt;rabe@RWTH-Aachen.DE&gt; "When
fetchmail downloads mail and Exim+SpamAssassin detecs an incoming
message as spam, fetchmail tries to bounce it. Unfortunately it uses
an incorrect hostname as part of the sender address (I've an internal
LAN with private hostnames, plus an official IP address and hostname,
and fetchmail picks the internal name of my host.) So I'd like to have
a config statement that allows me to explicitly set a senderaddress
for bounce messages."</p>

<p>In the SSL support, add authentication of Certifying Authority
(Is this a Certifying Authority we recognize?).</p>

<p>Debian wishlist item 181157: ssl key learning for self-signed certificates.</p>

<p>Laszlo Vecsey writes: "I believe qmail uses a technique of
writing temporary files to nfs, and then moving them into place to
ensure that they're written. Actually a hardlink is made to the
temporary file and the destination name in a new directory, then
the first one is unlinked. Maybe a combination of this will help
with the fetchmail lock file."</p>

<p>Maybe refuse multidrop configuration unless "envelope" is _explicitly_
configured (and tell the user he needs to configure the envelope
option) and change the envelope default to nil.  This would
prevent a significant class of shoot-self-in-foot problems.</p>

<p>Given the above change, perhaps treat a delivery as "temporarily
failed" (leaving the message on the server, not putting it into
.fetchids) when the header listed in the "envelope" option is not
found.  (This is so you don't lose mail if you configure the wrong
envelope header.)</p>

<p>Matthias Andree writes:</p>

<blockquote> 
<p>NOTE that the current code need optimization, if I have
unseen articles 3 and 47, fetchmail will happily request LIST for
articles 3...47 rather than just 3 and 47. In cases where the message
numbers are far apart, this involves considerable overhead - which
could be alleviated by pipelining the list commands, which needs
either asynchronous reading while sending the commands, or knowing the
send buffer, to avoid deadlocks. Unfortunately, I don't have the time
to delve deeper into the code and look around.</p>

<p>Note that such a pipelining function would be of universal use, so it
should not be in pop3.c or something. I'd think the best approach is to
call a "sender" function with the command and a callback, and the sender
will call the receiver when the send buffer is full and call the
callback function for each reply received.</p> 

<p>See the ESMTP PIPELINING RFC for details on the deadlock avoidance
requirements.</p>
</blockquote>

<hr />
<br clear="left" />
<address>-2003 Eric S. Raymond <a
	href="mailto:esr@thyrsus.com">&lt;esr@thyrsus.com&gt;</a><br />
2004- Matthias Andree <a
		href="mailto:matthias.andree@gmx.de">&lt;matthias.andree@gmx.de&gt;</a></address>
</body>
</html>
#!/usr/bin/env python
#
# A GUI configurator for generating fetchmail configuration files.
# by Eric S. Raymond, <esr@snark.thyrsus.com>.
# Requires Python with Tkinter, and the following OS-dependent services:
#	posix, posixpath, socket
#
# TO DO: Arrange for save and quit buttons to clean up all frames dependent
# on the current ones.
version = "1.1"

from Tkinter import *
from Dialog import *
import sys, time, os, string, socket, getopt

#
# Define the data structures the GUIs will be tossing around
#
class Configuration:
    def __init__(self):
	self.poll_interval = 0		# Normally, run in foreground
	self.syslog = FALSE		# Use syslogd for logging?
	self.logfile = None		# No logfile, initially
	self.idfile = os.environ["HOME"] + "/.fetchids"		# Default idfile, initially
        self.postmaster = None		# No last-resort address, initially
	self.invisible = FALSE		# Suppress Received line & spoof?
	self.servers = []		# List of included sites
	Configuration.typemap = (
	    ('poll_interval',	'Int'),
	    ('syslog',		'Boolean'),
	    ('logfile',		'String'),
	    ('idfile',		'String'),
	    ('postmaster',	'String'),
	    ('invisible',	'Boolean'))

    def __repr__(self):
	str = "";
	if self.syslog != ConfigurationDefaults.syslog:
	   str = str + ("set syslog\n")
	elif self.logfile:
	    str = str + ("set logfile \"%s\"\n" % (self.logfile,));
	if self.idfile != ConfigurationDefaults.idfile:
	    str = str + ("set idfile \"%s\"\n" % (self.idfile,));
	if self.postmaster != ConfigurationDefaults.postmaster:
	    str = str + ("set postmaster \"%s\"\n" % (self.postmaster,));
	if self.poll_interval > 0:
	    str = str + "set daemon " + `self.poll_interval` + "\n"
	for site in self.servers:
	    str = str + repr(site)
	return str

    def __str__(self):
	return "[Configuration: " + repr(self) + "]"

class Server:
    def __init__(self):
	self.pollname = None		# Poll label
	self.via = None			# True name of host
	self.active = TRUE		# Poll status
	self.interval = 0		# Skip interval
	self.protocol = 'auto'		# Default to auto protocol
	self.port = 0			# Port number to use
	self.uidl = FALSE		# Don't use RFC1725 UIDLs by default
	self.auth = 'password'		# Default to password authentication
	self.timeout = 300		# 5-minute timeout
	self.envelope = 'Received'	# Envelope-address header
	self.envskip = 0		# Number of envelope headers to skip
	self.qvirtual = None		# Name prefix to strip
	self.aka = []			# List of DNS aka names
	self.dns = TRUE			# Enable DNS lookup on multidrop
	self.localdomains = []		# Domains to be considered local
	self.interface = None		# IP address and range
	self.monitor = None		# IP address and range
	self.netsec = None		# IPV6 security options
	self.users = []			# List of user entries for site
	Server.typemap = (
	    ('pollname',  'String'),
	    ('via',       'String'),
	    ('active',    'Boolean'),
	    ('interval',  'Int'),
	    ('protocol',  'String'),
	    ('interval',  'Int'),
	    ('port',      'Int'),
	    ('uidl',      'Boolean'),
	    ('auth',      'String'),
	    ('timeout',   'Int'),
	    ('envelope',  'String'),
	    ('envskip',   'Int'),
	    ('qvirtual',  'String'),
	    # leave aka out
	    ('dns',       'Boolean'),
	    # leave localdomains out
	    ('interface', 'String'),
	    ('monitor',   'String'),
	    ('netsec',   'String'))

    def dump(self, folded):
	str = ""
	if self.active:   str = str + "poll"
	else:             str = str + "skip"
	str = str + (" " + self.pollname)
	if self.via:
	    str = str + (" via \"%s\"\n" % (self.via,));
	if self.protocol != ServerDefaults.protocol:
	    str = str + " with proto " + self.protocol 
	if self.port != defaultports[self.protocol] and self.port != 0:
	    str = str + " port " + `self.port`
	if self.timeout != ServerDefaults.timeout:
	    str = str + " timeout " + `self.timeout`
	if self.interval != ServerDefaults.interval: 
	    str = str + " interval " + `self.interval`
	if self.envelope != ServerDefaults.envelope or self.envskip != ServerDefaults.envskip:
	    if self.envskip:
		str = str + " envelope " + self.envskip + " " + self.envelope
	    else:
		str = str + " envelope " + self.envelope
	if self.qvirtual:
	    str = str + (" qvirtual \"%s\"\n" % (self.qvirtual,));
	if self.auth != ServerDefaults.auth:
	    str = str + " auth " + self.auth
	if self.dns != ServerDefaults.dns or self.uidl != ServerDefaults.uidl:
	    str = str + " and options"
	if self.dns != ServerDefaults.dns:
	    str = str + flag2str(self.dns, 'dns')
	if self.uidl != ServerDefaults.uidl:
	    str = str + flag2str(self.uidl, 'uidl')
	if folded:        str = str + "\n    "
	else:             str = str + " "

	if self.aka:
	     str = str + "aka"
	     for x in self.aka:
		str = str + " " + x
	if self.aka and self.localdomains: str = str + " "
	if self.localdomains:
	     str = str + ("localdomains")
	     for x in self.localdomains:
		str = str + " " + x
        if (self.aka or self.localdomains):
	    if folded:
		str = str + "\n    "
	    else:
		str = str + " "

	if self.interface:
            str = str + "interface \"" + self.interface + "\""
	if self.monitor:
            str = str + "monitor \"" + self.monitor + "\""
	if self.netsec:
            str = str + "netsec \"" + self.netsec + "\""
	if self.interface or self.monitor or self.netsec:
	    if folded:
		str = str + "\n"

	if str[-1] == " ": str = str[0:-1]

	for user in self.users:
	    str = str + repr(user)
	str = str + "\n"
	return str;

    def __repr__(self):
	return self.dump(TRUE)

    def __str__(self):
	return "[Server: " + self.dump(FALSE) + "]"

class User:
    def __init__(self):
	self.remote = os.environ["USER"]# Remote username
	self.localnames = [self.remote,]# Local names
	self.password = None		# Password for mail account access
	self.mailboxes = []		# Remote folders to retrieve from
	self.smtphunt = []		# Hosts to forward to
	self.smtpaddress = None;	# Append this to MAIL FROM line
	self.preconnect = None		# Connection setup
	self.postconnect = None		# Connection wrapup
	self.mda = None			# Mail Delivery Agent
	self.antispam = 571;		# Listener's spam-block code
	self.keep = FALSE		# Keep messages
	self.flush = FALSE		# Flush messages
	self.fetchall = FALSE		# Fetch old messages
	self.rewrite = TRUE		# Rewrite message headers
	self.forcecr = FALSE		# Force LF -> CR/LF
	self.stripcr = FALSE		# Strip CR
	self.pass8bits = FALSE		# Force BODY=7BIT
	self.mimedecode = FALSE		# Undo MIME armoring
	self.dropstatus = FALSE		# Drop incoming Status lines
	self.limit = 0			# Message size limit
	self.fetchlimit = 0		# Max messages fetched per batch
	self.batchlimit = 0		# Max message forwarded per batch
	self.expunge = 1		# Interval between expunges (IMAP)
	User.typemap = (
	    ('remote',      'String'),
	    # leave out mailboxes and localnames
	    ('password',    'String'),
            # Leave out smtphunt
	    ('smtpaddress', 'String'),
	    ('preconnect',  'String'),
	    ('postconnect', 'String'),
	    ('mda',         'String'),
	    ('antispam',    'Int'),
	    ('keep',        'Boolean'),
	    ('flush',       'Boolean'),
	    ('fetchall',    'Boolean'),
	    ('rewrite',     'Boolean'),
	    ('forcecr',     'Boolean'),
	    ('stripcr',     'Boolean'),
	    ('pass8bits',   'Boolean'),
	    ('mimedecode',  'Boolean'),
	    ('dropstatus',  'Boolean'),
	    ('limit',       'Int'),
	    ('fetchlimit',  'Int'),
	    ('batchlimit',  'Int'),
	    ('expunge',     'Int'))

    def __repr__(self):
	str = "    "
	str = str + "user \"" + self.remote + "\" there ";
	if self.password:
            str = str + "with password \"" + self.password + '" '
	if self.localnames:
            str = str + "is"
            for x in self.localnames:
		str = str + " " + x
            str = str + " here"
	if (self.keep != UserDefaults.keep
		or self.flush != UserDefaults.flush
		or self.fetchall != UserDefaults.fetchall
		or self.rewrite != UserDefaults.rewrite 
		or self.forcecr != UserDefaults.forcecr 
		or self.stripcr != UserDefaults.stripcr 
		or self.pass8bits != UserDefaults.pass8bits
		or self.mimedecode != UserDefaults.mimedecode
		or self.dropstatus != UserDefaults.dropstatus):
	    str = str + " options"
	if self.keep != UserDefaults.keep:
	    str = str + flag2str(self.keep, 'keep')
	if self.flush != UserDefaults.flush:
	    str = str + flag2str(self.flush, 'flush')
	if self.fetchall != UserDefaults.fetchall:
	    str = str + flag2str(self.fetchall, 'fetchall')
	if self.rewrite != UserDefaults.rewrite:
	    str = str + flag2str(self.rewrite, 'rewrite')
	if self.forcecr != UserDefaults.forcecr:
	    str = str + flag2str(self.forcecr, 'forcecr')
	if self.stripcr != UserDefaults.stripcr:
	    str = str + flag2str(self.stripcr, 'stripcr')
	if self.pass8bits != UserDefaults.pass8bits:
	    str = str + flag2str(self.pass8bits, 'pass8bits')
	if self.mimedecode != UserDefaults.mimedecode:
	    str = str + flag2str(self.mimedecode, 'mimedecode')
	if self.dropstatus != UserDefaults.dropstatus:
	    str = str + flag2str(self.dropstatus, 'dropstatus')
	if self.limit != UserDefaults.limit:
	    str = str + " limit " + `self.limit`
	if self.fetchlimit != UserDefaults.fetchlimit:
	    str = str + " fetchlimit " + `self.fetchlimit`
	if self.batchlimit != UserDefaults.batchlimit:
	    str = str + " batchlimit " + `self.batchlimit`
	if self.expunge != UserDefaults.expunge:
	    str = str + " expunge " + `self.expunge`
        str = str + "\n"
        trimmed = self.smtphunt;
        if trimmed != [] and trimmed[len(trimmed) - 1] == "localhost":
            trimmed = trimmed[0:len(trimmed) - 1]
        if trimmed != [] and trimmed[len(trimmed) - 1] == hostname:
            trimmed = trimmed[0:len(trimmed) - 1]
        if trimmed != []:
            str = str + "    smtphost "
            for x in trimmed:
                str = str + " " + x
                str = str + "\n"
	if self.mailboxes:
	     str = str + "    folder"
	     for x in self.mailboxes:
		str = str + " " + x
	     str = str + "\n"
        for fld in ('smtpaddress', 'preconnect', 'postconnect', 'mda'):
            if getattr(self, fld):
                str = str + " %s \"%s\"\n" % (fld, `getattr(self, fld)`)
        if self.antispam != UserDefaults.antispam:
            str = str + "    antispam " + `self.antispam` + "\n"
	return str;

    def __str__(self):
	return "[User: " + repr(self) + "]"

#
# Helper code
#

defaultports = {"auto":0,
    		"POP2":109, 
		"POP3":110,
                "APOP":110,
                "KPOP":1109,
                "IMAP":143,
		"IMAP-K4":143,
		"ETRN":25}

protolist = ("auto", "POP2", "POP3", "APOP", "KPOP", "IMAP", "IMAP-K4", "ETRN")

authlist = ("password", "kerberos")

listboxhelp = {
    'title' : 'List Selection Help',
    'banner': 'List Selection',
    'text' : """
You must select an item in the list box (by clicking on it). 
"""}

def flag2str(value, string):
# make a string representation of a .fetchmailrc flag or negated flag
    str = ""
    if value != None:
	str = str + (" ")
	if value == FALSE: str = str + ("no ")
	str = str + string;
    return str

class LabeledEntry(Frame):
# widget consisting of entry field with caption to left
    def bind(self, key, action):
	self.E.bind(key, action)
    def focus_set(self):
	self.E.focus_set()
    def __init__(self, Master, text, textvar, lwidth, ewidth=12):
	Frame.__init__(self, Master)
	self.L = Label(self, {'text':text, 'width':lwidth, 'anchor':'w'})
	self.E = Entry(self, {'textvar':textvar, 'width':ewidth})
	self.L.pack({'side':'left'})
	self.E.pack({'side':'left', 'expand':'1', 'fill':'x'})

def ButtonBar(frame, legend, ref, alternatives, depth, command):
# array of radio buttons, caption to left, picking from a string list
    bar = Frame(frame)
    width = len(alternatives) / depth;
    Label(bar, text=legend).pack(side=LEFT)
    for column in range(width):
	subframe = Frame(bar)
	for row in range(depth):
	    ind = width * row + column
	    Radiobutton(subframe,
			{'text':alternatives[ind], 
			 'variable':ref,
			 'value':alternatives[ind],
			 'command':command}).pack(side=TOP, anchor=W)
	subframe.pack(side=LEFT)
    bar.pack(side=TOP);
    return bar

def helpwin(helpdict):
# help message window with a self-destruct button
    helpwin = Toplevel()
    helpwin.title(helpdict['title']) 
    helpwin.iconname(helpdict['title'])
    Label(helpwin, text=helpdict['banner']).pack()
    textwin = Message(helpwin, text=helpdict['text'], width=600)
    textwin.pack()
    Button(helpwin, text='Done', 
	   command=lambda x=helpwin: Widget.destroy(x),
	   relief=SUNKEN, bd=2).pack()

def make_icon_window(base, image):
    try:
        # Some older pythons will error out on this
        icon_image = PhotoImage(data=image)
        icon_window = Toplevel()
        Label(icon_window, image=icon_image, bg='black').pack()
        base.master.iconwindow(icon_window)
	# Avoid TkInter brain death. PhotoImage objects go out of
        # scope when the enclosing function returns.  Therefore
        # we have to explicitly link them to something.
        base.keepalive.append(icon_image)
    except:
        pass

class ListEdit(Frame):
# edit a list of values (duplicates not allowed) with a supplied editor hook 
    def __init__(self, newlegend, list, editor, master, helptxt):
	self.editor = editor
	self.list = list

	# Set up a widget to accept new elements
	self.newval = StringVar(master)
	newwin = LabeledEntry(master, newlegend, self.newval, '12')
	newwin.bind('<Double-1>', self.handleNew)
	newwin.bind('<Return>', self.handleNew)
	newwin.pack(side=TOP, fill=X, anchor=E)

	# Edit the existing list
	listframe = Frame(master)
	scroll = Scrollbar(listframe)
	self.listwidget = Listbox(listframe, height=0, selectmode='browse')
        if self.list:
            for x in self.list:
                self.listwidget.insert(END, x)
	listframe.pack(side=TOP, expand=YES, fill=BOTH)
	self.listwidget.config(yscrollcommand=scroll.set, relief=SUNKEN)
	self.listwidget.pack(side=LEFT, expand=YES, fill=BOTH)
	scroll.config(command=self.listwidget.yview, relief=SUNKEN)
	scroll.pack(side=RIGHT, fill=BOTH)
	self.listwidget.config(selectmode=SINGLE, setgrid=TRUE)
	self.listwidget.bind('<Double-1>', self.handleList);
	self.listwidget.bind('<Return>', self.handleList);

	bf = Frame(master);
	if self.editor:
	    Button(bf, text='Edit',   command=self.editItem).pack(side=LEFT)
	Button(bf, text='Delete', command=self.deleteItem).pack(side=LEFT)
	if helptxt:
	    self.helptxt = helptxt
	    Button(bf, text='Help', fg='blue',
		   command=self.help).pack(side=RIGHT)
	bf.pack(fill=X)

    def help(self):
	helpwin(self.helptxt)

    def handleList(self, event):
	self.editItem();

    def handleNew(self, event):
	item = self.newval.get()
	entire = self.listwidget.get(0, self.listwidget.index('end'));
	if item and (not entire) or (not item in self.listwidget.get(0, self.listwidget.index('end'))):
	    self.listwidget.insert('end', item)
	    if self.list != None: self.list.append(item)
	self.newval.set('')

    def editItem(self):
	select = self.listwidget.curselection()
	if not select:
	    helpwin(listboxhelp)
	else:
	    index = select[0]
	    if index and self.editor:
		label = self.listwidget.get(index);
		apply(self.editor, (label,))

    def deleteItem(self):
	select = self.listwidget.curselection()
	if not select:
	    helpwin(listboxhelp)
	else:
	    index = string.atoi(select[0])
	    if index:
		self.listwidget.delete(index)
		if self.list != None: del self.list[index]

def ConfirmQuit(frame, context):
    ans = Dialog(frame, 
		 title = 'Quit?',
		 text = 'Really quit ' + context + ' without saving?',
		 bitmap = 'question',
		 strings = ('Yes', 'No'),
		 default = 1)
    return ans.num == 0

def dispose_window(master, legend, help):
    dispose = Frame(master, relief=RAISED, bd=5)
    Label(dispose, text=legend).pack(side=TOP,pady=10)
    Button(dispose, text='Save', fg='blue',
           command=master.save).pack(side=LEFT)
    Button(dispose, text='Quit', fg='blue',
           command=master.nosave).pack(side=LEFT)
    Button(dispose, text='Help', fg='blue',
           command=lambda x=help: helpwin(x)).pack(side=RIGHT)
    dispose.pack(fill=X)
    return dispose

class MyWidget:
# Common methods for Tkinter widgets -- deals with Tkinter declaration
    def post(self, widgetclass, field):
	for x in widgetclass.typemap:
	    if x[1] == 'Boolean':
		setattr(self, x[0], BooleanVar(self))
	    elif x[1] == 'String':
		setattr(self, x[0], StringVar(self))
	    elif x[1] == 'Int':
		setattr(self, x[0], IntVar(self))
	    source = getattr(getattr(self, field), x[0])
            if source:
                getattr(self, x[0]).set(source)

    def fetch(self, widgetclass, field):
	for x in widgetclass.typemap:
	    setattr(getattr(self, field), x[0], getattr(self, x[0]).get())

#
# First, code to set the global fetchmail run controls.
#

configure_novice_help = {
    'title' : 'Fetchmail novice configurator help',
    'banner': 'Novice configurator help',
    'text' : """
In the `Novice Configurator Controls' panel, you can:

Press `Save' to save the new fetchmail configuration you have created.
Press `Quit' to exit without saving.
Press `Help' to bring up this help message.

In the `Novice Configuration' panels, you will set up the basic data
needed to create a simple fetchmail setup.  These include:

1. The name of the remote site you want to query.

2. Your login name on that site.

3. Your password on that site.

4. A protocol to use (POP, IMAP, ETRN, etc.)

5. A polling interval.

6. Options to fetch old messages as well as new, uor to suppress
   deletion of fetched message.

The novice-configuration code will assume that you want to forward mail
to a local sendmail listener with no special options.
"""}

configure_expert_help = {
    'title' : 'Fetchmail expert configurator help',
    'banner': 'Expert configurator help',
    'text' : """
In the `Expert Configurator Controls' panel, you can:

Press `Save' to save the new fetchmail configuration you have edited.
Press `Quit' to exit without saving.
Press `Help' to bring up this help message.

In the `Run Controls' panel, you can set the following options that
control how fetchmail runs:

Poll interval
        Number of seconds to wait between polls in the background.
        If zero, fetchmail will run in foreground.

Logfile
        If empty, emit progress and error messages to stderr.
        Otherwise this gives the name of the files to write to.
        This field is ignored if the "Log to syslog?" option is on.

Idfile
        If empty, store seen-message IDs in .fetchids under user's home
        directory.  If nonempty, use given file name.

Postmaster
        Who to send multidrop mail to as a last resort if no address can
        be matched.  Normally empty; in this case, fetchmail treats the
        invoking user as the address of last resort unless that user is
        root.  If that user is root, fetchmail sends to `postmaster'.

Invisible
        If false (the default) fetchmail generates a Received line into
        each message and generates a HELO from the machine it is running on.
        If true, fetchmail generates no Received line and HELOs as if it were
        the remote site.

In the `Remote Mail Configurations' panel, you can:

1. Enter the name of a new remote mail server you want fetchmail to query.

To do this, simply enter a label for the poll configuration in the
`New Server:' box.  The label should be a DNS name of the server (unless
you are using ssh or some other tunneling method and will fill in the `via'
option on the site configuration screen).

2. Change the configuration of an existing site.

To do this, find the site's label in the listbox and double-click it.
This will take you to a site configuration dialogue.
"""}


class ConfigurationEdit(Frame, MyWidget):
    def __init__(self, configuration, outfile, master=None):
	self.configuration = configuration
        self.outfile = outfile
        self.container = master
        ConfigurationEdit.mode_to_help = {
            'novice':configure_novice_help, 'expert':configure_expert_help
            }

    def edit(self, mode):
        self.mode = mode
	Frame.__init__(self, self.container)
	self.master.title('fetchmail ' + self.mode + ' configurator');
	self.master.iconname('fetchmail ' + self.mode + ' configurator');
        self.keepalive = []	# Use this to anchor the PhotoImage object
        make_icon_window(self, fetchmail_gif)
	Pack.config(self)
        self.post(Configuration, 'configuration')

	dispose_window(self,
                       'Configurator ' + self.mode + ' Controls',
                       ConfigurationEdit.mode_to_help[self.mode])

	gf = Frame(self, relief=RAISED, bd = 5)
	Label(gf,
		text='Fetchmail Run Controls', 
		bd=2).pack(side=TOP, pady=10)

        df = Frame(gf)

        # Set the poll interval
        de = LabeledEntry(df, '     Poll interval:', self.poll_interval, '14')
        de.pack(side=RIGHT, anchor=E)
        df.pack()

        if self.mode != 'novice':
            sf = Frame(gf)
            Checkbutton(sf,
		{'text':'Log to syslog?',
		'variable':self.syslog,
		'relief':GROOVE}).pack(side=LEFT, anchor=W)
            log = LabeledEntry(sf, '     Logfile:', self.logfile, '14')
            log.pack(side=RIGHT, anchor=E)
            sf.pack(fill=X)

            Checkbutton(gf,
		{'text':'Invisible mode?',
		'variable':self.invisible,
                 'relief':GROOVE}).pack(side=LEFT, anchor=W)
            # Set the idfile
            log = LabeledEntry(gf, '     Idfile:', self.idfile, '14')
            log.pack(side=RIGHT, anchor=E)
            # Set the postmaster
            log = LabeledEntry(gf, '     Postmaster:', self.postmaster, '14')
            log.pack(side=RIGHT, anchor=E)

	gf.pack(fill=X)

        # Expert mode allows us to edit multiple sites
	lf = Frame(self, relief=RAISED, bd=5)
	Label(lf,
	      text='Remote Mail Server Configurations', 
	      bd=2).pack(side=TOP, pady=10)
	ListEdit('New Server:', 
		map(lambda x: x.pollname, self.configuration.servers),
		lambda site, m=self.mode, s=self.configuration.servers:
                 ServerEdit(site, s).edit(m, Toplevel()),
                lf, remotehelp)
	lf.pack(fill=X)

    def nosave(self):
	if ConfirmQuit(self, self.mode + " configuration editor"):
	    self.quit()

    def save(self):
        self.fetch(Configuration, 'configuration')
        fm = None
        if not self.outfile:
            fm = sys.stdout
        elif not os.path.isfile(self.outfile) or Dialog(self, 
		 title = 'Overwrite existing run control file?',
		 text = 'Really overwrite existing run control file?',
		 bitmap = 'question',
		 strings = ('Yes', 'No'),
		 default = 1).num == 0:
            fm = open(self.outfile, 'w')
        if fm:
            fm.write("# Configuration created %s by fetchmailconf\n" % time.ctime(time.time()))
            fm.write(`self.configuration`)
            os.chmod(self.outfile, 0600)
            self.quit()

#
# Server editing stuff.
#
remotehelp = {
    'title' : 'Remote site help',
    'banner': 'Remote sites',
    'text' : """
When you add a site name to the list here, 
you initialize an entry telling fetchmail
how to poll a new site.

When you select a sitename (by double-
clicking it, or by single-clicking to
select and then clicking the Edit button),
you will open a window to configure that
site.
"""}

serverhelp = {
    'title' : 'Server options help',
    'banner': 'Server Options',
    'text' : """
The server options screen controls fetchmail 
options that apply to one of your mailservers.

Once you have a mailserver configuration set
up as you like it, you can select `Save' to
store it in the server list maintained in
the main configuration window.

If you wish to discard changes to a server 
configuration, select `Quit'.
"""}

controlhelp = {
    'title' : 'Run Control help',
    'banner': 'Run Controls',
    'text' : """
If the `Poll normally' checkbox is on, the host is polled as part of
the normal operation of fetchmail when it is run with no arguments.
If it is off, fetchmail will only query this host when it is given as
a command-line argument.

The `True name of server' box should specify the actual DNS name
to query. By default this is the same as the poll name.

Normally each host described in the file is queried once each 
poll cycle. If `Cycles to skip between polls' is greater than 0,
that's the number of poll cycles that are skipped between the
times this post is actually polled.

The `Server timeout' is the number of seconds fetchmail will wait
for a reply from the mailserver before concluding it is hung and
giving up.
"""}

protohelp = {
    'title' : 'Protocol and Port help',
    'banner': 'Protocol and Port',
    'text' : """
These options control the remote-mail protocol
and TCP/IP service port used to query this
server.

If you click the `Probe for supported protocols'
button, fetchmail will try to find you the most
capable server on the selected host (this will
only work if you're conncted to the Internet).
The probe only checks for ordinary IMAP and POP
protocols; fortunately these are the most
frequently supported.

The `Protocol' button bar offers you a choice of
all the different protocols available.  The `auto'
protocol is the default mode; it probes the host
ports for POP3 and IMAP to see if either is
available.

Normally the TCP/IP service port to use is 
dictated by the protocol choice.  The `Port'
field (only present in expert mode) lets you
set a non-standard port.
"""}

sechelp = {
    'title' : 'Security option help',
    'banner': 'Security',
    'text' : """
The `interface' option, if given, specifies the only
device through which fetchmail is permitted to connect
to servers.  Specifying this may protect you from a 
spoofing attack if your client machine has more than
one IP gateway address and some of the gateways are
to insecure nets.

The `monitor' option allows you to specify a range
of IP addresses to monitor for activity.  If these
addresses are not active, fetchmail will not poll.
This option may be used to prevent fetchmail from
triggering an expensive dial-out if the interface
is not already active.

The `interface' and `monitor' options are available
only for Linux systems.  See the fetchmail manual page
for details on these.

The `netsec' option will be configurable only if fetchmail
was compiled with IPV6 support.  If you need to use it,
you probably know what to do.
"""}

multihelp = {
    'title' : 'Multidrop option help',
    'banner': 'Multidrop',
    'text' : """
These options are only useful with multidrop mode.
See the manual page for extended discussion.
"""}

suserhelp = {
    'title' : 'User list help',
    'banner': 'User list',
    'text' : """
When you add a user name to the list here, 
you initialize an entry telling fetchmail
to poll the site on behalf of the new user.

When you select a username (by double-
clicking it, or by single-clicking to
select and then clicking the Edit button),
you will open a window to configure the
user's options on that site.
"""}

class ServerEdit(Frame, MyWidget):
    def __init__(self, host, servers):
	self.server = None
	for site in servers:
	    if site.pollname == host:
		self.server = site
	if (self.server == None):
		self.server = Server()
		self.server.pollname = host
		self.server.via = None
		servers.append(self.server)

    def edit(self, mode, master=None):
	Frame.__init__(self, master)
	Pack.config(self)
	self.master.title('Fetchmail host ' + self.server.pollname);
	self.master.iconname('Fetchmail host ' + self.server.pollname);
	self.post(Server, 'server')
	self.makeWidgets(self.server.pollname, mode)
        self.keepalive = []	# Use this to anchor the PhotoImage object
        make_icon_window(self, fetchmail_gif)
#	self.grab_set()
#	self.focus_set()
#	self.wait_window()

    def nosave(self):
	if ConfirmQuit(self, 'server option editing'):
	    Widget.destroy(self.master)

    def save(self):
	self.fetch(Server, 'server')
	Widget.destroy(self.master)

    def refreshPort(self):
	proto = self.protocol.get()
	self.port.set(defaultports[proto])
	if not proto in ("POP3", "APOP", "KPOP"): self.uidl.state = DISABLED 

    def makeWidgets(self, host, mode):
	topwin = dispose_window(self, "Server options for querying " + host, serverhelp)

	leftwin = Frame(self);
	leftwidth = '25';

        if mode != 'novice':
            ctlwin = Frame(leftwin, relief=RAISED, bd=5)
            Label(ctlwin, text="Run Controls").pack(side=TOP)
            Checkbutton(ctlwin, text='Poll ' + host + ' normally?', variable=self.active).pack(side=TOP)
            LabeledEntry(ctlwin, 'True name of ' + host + ':',
		      self.via, leftwidth).pack(side=TOP, fill=X)
            LabeledEntry(ctlwin, 'Cycles to skip between polls:',
		      self.interval, leftwidth).pack(side=TOP, fill=X)
            LabeledEntry(ctlwin, 'Server timeout (seconds):',
		      self.timeout, leftwidth).pack(side=TOP, fill=X)
            Button(ctlwin, text='Help', fg='blue',
	       command=lambda: helpwin(controlhelp)).pack(side=RIGHT)
            ctlwin.pack(fill=X)

	protwin = Frame(leftwin, relief=RAISED, bd=5)
	Label(protwin, text="Protocol").pack(side=TOP)
	ButtonBar(protwin, '',
                  self.protocol, protolist, 2,
                  self.refreshPort) 
        if mode != 'novice':
            LabeledEntry(protwin, 'On server TCP/IP port:',
		      self.port, leftwidth).pack(side=TOP, fill=X)
            self.refreshPort()
            Checkbutton(protwin,
		text="POP3: track `seen' with client-side UIDLs?",
		variable=self.uidl).pack(side=TOP)   
	Button(protwin, text='Probe for supported protocols', fg='blue',
	       command=self.autoprobe).pack(side=LEFT)
	Button(protwin, text='Help', fg='blue',
	       command=lambda: helpwin(protohelp)).pack(side=RIGHT)
	protwin.pack(fill=X)

	userwin = Frame(leftwin, relief=RAISED, bd=5)
	Label(userwin, text="User entries for " + host).pack(side=TOP)
	ListEdit("New user: ",
                 map(lambda x: x.remote, self.server.users),
                 lambda u, m=mode, s=self.server: UserEdit(u,s).edit(m, Toplevel()),
                 userwin, suserhelp)
	userwin.pack(fill=X)

	leftwin.pack(side=LEFT, anchor=N, fill=X);

        if mode != 'novice':
            rightwin = Frame(self);

            mdropwin = Frame(rightwin, relief=RAISED, bd=5)
            Label(mdropwin, text="Multidrop options").pack(side=TOP)
            LabeledEntry(mdropwin, 'Envelope address header:',
		      self.envelope, '22').pack(side=TOP, fill=X)
            LabeledEntry(mdropwin, 'Envelope headers to skip:',
		      self.envskip, '22').pack(side=TOP, fill=X)
            LabeledEntry(mdropwin, 'Name prefix to strip:',
		      self.qvirtual, '22').pack(side=TOP, fill=X)
            Checkbutton(mdropwin, text="Enable multidrop DNS lookup?",
		    variable=self.dns).pack(side=TOP)
            Label(mdropwin, text="DNS aliases").pack(side=TOP)
            ListEdit("New alias: ", self.server.aka, None, mdropwin, None)
            Label(mdropwin, text="Domains to be considered local").pack(side=TOP)
            ListEdit("New domain: ",
		 self.server.localdomains, None, mdropwin, multihelp)
            mdropwin.pack(fill=X)

            if 'interface' in dictmembers or 'monitor' in dictmembers or 'netsec' in dictmembers:
                secwin = Frame(rightwin, relief=RAISED, bd=5)
                Label(secwin, text="Security").pack(side=TOP)
                # Don't actually let users set this.  KPOP sets it implicitly
                #	ButtonBar(secwin, 'Authorization mode:',
                #		  self.auth, authlist, 1, None).pack(side=TOP)
                if 'interface' in dictmembers:
                    LabeledEntry(secwin, 'Interface to check before poll:',
			 self.interface, leftwidth).pack(side=TOP, fill=X)
                if 'monitor' in dictmembers:
                    LabeledEntry(secwin, 'IP range to monitor:',
			 self.monitor, leftwidth).pack(side=TOP, fill=X)
                if 'netsec' in dictmembers:
                    LabeledEntry(secwin, 'IPV6 security options:',
			 self.netsec, leftwidth).pack(side=TOP, fill=X)
                    Button(secwin, text='Help', fg='blue',
                           command=lambda: helpwin(sechelp)).pack(side=RIGHT)
                secwin.pack(fill=X)

            rightwin.pack(side=LEFT, anchor=N);

    def autoprobe(self):
        # Note: this only handles case (1) near fetchmail.c:892
        # We're assuming people smart enough to set up ssh tunneling
        # won't need autoprobing.
        if self.server.via != None:
            realhost = self.server.via
        else:
            realhost = self.server.pollname
        greetline = None
        for (protocol, port) in (("IMAP",143), ("POP3",110), ("POP2",109)):
            sock = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
            try:
                sock.connect(realhost, port)
                greetline = sock.recv(1024)
                sock.close()
            except:
                pass
            else:
                break
        confwin = Toplevel()
        if greetline == None:
            title = "Autoprobe of " + realhost + " failed"
            confirm = """
Fetchmailconf didn't find any mailservers active.
This could mean the host doesn't support any,
or that your Internet connection is down, or
that the host is so slow that the probe timed
out before getting a response.
"""
        else:
            warnings = ''
            # OK, now try to recognize potential problems

            if protocol == "POP2":
                warnings = warnings + """
It appears you have somehow found a mailserver running only POP2.
Congratulations.  Have you considered a career in archaeology?

Unfortunately, stock fetchmail binaries don't include POP2 support anymore.
Unless the first line of your fetchmail -V output includes the string "POP2",
you'll have to build it from sources yourself with the configure
switch --enable-POP2.

"""
            if string.find(greetline, "1.003") > 0 or string.find(greetline, "1.003") > 0:
                warnings = warnings + """
This appears to be an old version of the UC Davis POP server.  These are
dangerously unreliable (among other problems, they may drop your mailbox
on the floor if your connection is interrupted during the session).

It is strongly recommended that you find a better POP3 server.

"""
            if string.find(greetline, "usa.net") > 0:
                warnings = warnings + """
You appear to be using USA.NET's free mail service.  Their POP3 servers
(at least as of the 2.2 version in use mid-1998) are quite flaky, but
fetchmail can compensate.  They seem to require that fetchall be switched on
(otherwise you won't necessarily see all your mail, not even new mail).
They also botch the TOP command the fetchmail normally uses for retrieval
(it only retrieves about 10 lines rather than the number specified).
Turning on fetchall will disable the use of TOP.

Therefore, it is strongly recommended that you turn on `fetchall' on all
user entries associated with this server.  

"""
            if string.find(greetline, "QPOP") > 0:
                warnings = warnings + """
This appears to be a version of Eudora qpopper.  That's good.  Fetchmail
knows all about qpopper.

"""
            closebrak = string.find(greetline, ">")
            if  closebrak > 0 and greetline[closebrak+1] == "\r":
                warnings = warnings + """
It looks like you could use APOP on this server and avoid sending it your
password in clear.  You should talk to the mailserver administrator about
this.

"""
            if string.find(greetline, "csi.com") > 0:
                warnings = warnings + """
It appears you're talking to CompuServe.  You can use their special RPA
service for authentication, but only if your fetchmail -V output's first
line contains the string "RPA".  This is not included in stock fetchmail
binaries; to compile it in, rebuild from sources with the configure
option --enable-RPA.
"""
            if string.find(greetline, "IMAP2bis") > 0:
                warnings = warnings + """
IMAP2bis servers have a minor problem; they can't peek at messages without
marking them seen.  If you take a line hit during the retrieval, the 
interrupted message may get left on the server, marked seen.

To work around this, it is recommended that you set the `fetchall'
option on all user entries associated with this server, so any stuck
mail will be retrieved next time around.

"""
            if warnings == '':
                warnings = warnings + """
Fetchmail doesn't know anything special about this server type.
"""

            # Display success window with warnings
            title = "Autoprobe of " + realhost + " succeeded"
            confirm = "The " + protocol + " server said:\n\n" + greetline + warnings
            self.protocol.set(protocol)
        confwin.title(title) 
        confwin.iconname(title)
        Label(confwin, text=title).pack()
        Message(confwin, text=confirm, width=600).pack()
        Button(confwin, text='Done', 
                   command=lambda x=confwin: Widget.destroy(x),
                   relief=SUNKEN, bd=2).pack()
        
#
# User editing stuff
#

userhelp = {
    'title' : 'User option help',
    'banner': 'User options',
    'text' : """
You may use this panel to set options
that may differ between individual
users on your site.

Once you have a user configuration set
up as you like it, you can select `Save' to
store it in the server list maintained in
the main configuration window.

If you wish to discard the changes you have
made to user options, select `Quit'.
"""}

localhelp = {
    'title' : 'Local name help',
    'banner': 'Local names',
    'text' : """
The local name(s) in a user entry are the
people on the client machine who should
receive mail from the poll described.

Note: if a user entry has more than one
local name, messages will be retrieved
in multidrop mode.  This complicates
the configuration issues; see the manual
page section on multidrop mode.
"""}

class UserEdit(Frame, MyWidget):
    def __init__(self, username, server):
        self.server = server
	self.user = None
	for user in server.users:
	    if user.remote == username:
		self.user = user
	if self.user == None:
	    self.user = User()
	    self.user.remote = username
	    self.user.localnames = [username]
	    server.users.append(self.user)

    def edit(self, mode, master=None):
	Frame.__init__(self, master)
	Pack.config(self)
	self.master.title('Fetchmail user ' + self.user.remote
                          + ' querying ' + self.server.pollname);
	self.master.iconname('Fetchmail user ' + self.user.remote);
	self.post(User, 'user')
	self.makeWidgets(mode, self.server.pollname)
        self.keepalive = []	# Use this to anchor the PhotoImage object
        make_icon_window(self, fetchmail_gif)
#	self.grab_set()
#	self.focus_set()
#	self.wait_window()

    def nosave(self):
	if ConfirmQuit(self, 'user option editing'):
	    Widget.destroy(self.master)

    def save(self):
	self.fetch(User, 'user')
	Widget.destroy(self.master)

    def makeWidgets(self, mode, servername):
	dispose_window(self,
			"User options for " + self.user.remote + " querying " + servername,
			userhelp)

        if mode != 'novice':
            leftwin = Frame(self);
        else:
            leftwin = self

        secwin = Frame(leftwin, relief=RAISED, bd=5)
        Label(secwin, text="Authentication").pack(side=TOP)
        LabeledEntry(secwin, 'Password:',
		      self.password, '12').pack(side=TOP, fill=X)
        secwin.pack(fill=X, anchor=N)

        names = Frame(leftwin, relief=RAISED, bd=5)
        Label(names, text="Local names").pack(side=TOP)
        ListEdit("New name: ",
                     self.user.localnames, None, names, localhelp)
        names.pack(fill=X, anchor=N)

        if mode != 'novice':
            targwin = Frame(leftwin, relief=RAISED, bd=5)
            Label(targwin, text="Forwarding Options").pack(side=TOP)
            Label(targwin, text="Listeners to forward to").pack(side=TOP)
            ListEdit("New listener:", self.user.smtphunt, None, targwin, None)
            LabeledEntry(targwin, 'Append to MAIL FROM line:',
		     self.smtpaddress, '26').pack(side=TOP, fill=X)
            LabeledEntry(targwin, 'Connection setup command:',
		     self.preconnect, '26').pack(side=TOP, fill=X)
            LabeledEntry(targwin, 'Connection wrapup command:',
		     self.postconnect, '26').pack(side=TOP, fill=X)
            LabeledEntry(targwin, 'Local delivery agent:',
		     self.mda, '26').pack(side=TOP, fill=X)
            LabeledEntry(targwin, 'Listener spam-block code:',
		     self.antispam, '26').pack(side=TOP, fill=X)
            targwin.pack(fill=X, anchor=N)

        if mode != 'novice':
            leftwin.pack(side=LEFT, fill=X, anchor=N)
            rightwin = Frame(self)
        else:
            rightwin = self

	optwin = Frame(rightwin, relief=RAISED, bd=5)
	Label(optwin, text="Processing Options").pack(side=TOP)
	Checkbutton(optwin, text="Suppress deletion of messages after reading",
		    variable=self.keep).pack(side=TOP, anchor=W)
	Checkbutton(optwin, text="Fetch old messages as well as new",
		    variable=self.fetchall).pack(side=TOP, anchor=W)
        if mode != 'novice':
            Checkbutton(optwin, text="Flush seen messages before retrieval", 
		    variable=self.flush).pack(side=TOP, anchor=W)
            Checkbutton(optwin, text="Rewrite To/Cc/Bcc messages to enable reply", 
		    variable=self.rewrite).pack(side=TOP, anchor=W)
            Checkbutton(optwin, text="Force CR/LF at end of each line",
		    variable=self.forcecr).pack(side=TOP, anchor=W)
            Checkbutton(optwin, text="Strip CR from end of eacgh line",
		    variable=self.stripcr).pack(side=TOP, anchor=W)
            Checkbutton(optwin, text="Pass 8 bits even though SMTP says 7BIT",
		    variable=self.pass8bits).pack(side=TOP, anchor=W)
            Checkbutton(optwin, text="Undo MIME armoring on header and body",
		    variable=self.mimedecode).pack(side=TOP, anchor=W)
            Checkbutton(optwin, text="Drop Status lines from forwarded messages", 
		    variable=self.dropstatus).pack(side=TOP, anchor=W)
	optwin.pack(fill=X)

        if mode != 'novice':
            limwin = Frame(rightwin, relief=RAISED, bd=5)
            Label(limwin, text="Resource Limits").pack(side=TOP)
            LabeledEntry(limwin, 'Message size limit:',
		      self.limit, '30').pack(side=TOP, fill=X)
            LabeledEntry(limwin, 'Max messages to fetch per poll:',
		      self.fetchlimit, '30').pack(side=TOP, fill=X)
            LabeledEntry(limwin, 'Max messages to forward per poll:',
		      self.batchlimit, '30').pack(side=TOP, fill=X)
            LabeledEntry(limwin, 'Interval between expunges (IMAP):',
		      self.expunge, '30').pack(side=TOP, fill=X)
            limwin.pack(fill=X)

            foldwin = Frame(rightwin, relief=RAISED, bd=5)
            Label(foldwin, text="Remote folders (IMAP only)").pack(side=TOP)
            ListEdit("New folder:", self.user.mailboxes, None, foldwin, None)
            foldwin.pack(fill=X, anchor=N)

        if mode != 'novice':
            rightwin.pack(side=LEFT)
        else:
            self.pack()


#
# Top-level window that offers either novice or expert mode
# (but not both at once; it disappears when one is selected).
#

class MainWindow(Frame):
    def __init__(self, outfile, master=None):
	Frame.__init__(self, master)
        self.outfile = outfile
	self.master.title('fetchmail configurator main');
	self.master.iconname('fetchmail configurator main');
	Pack.config(self)
	Label(self,
		text='Fetchmailconf ' + version, 
		bd=2).pack(side=TOP, pady=10)
        self.keepalive = []	# Use this to anchor the PhotoImage object
        make_icon_window(self, fetchmail_gif)

	Message(self, text="""
Use `Novice Configuration' for basic fetchmail setup;
with this, you can easily set up a single-drop connection
to one remote mail server.
""", width=600).pack(side=TOP)
	Button(self, text='Novice Configuration',
				fg='blue', command=self.novice).pack()

	Message(self, text="""
Use `Expert Configuration' for advanced fetchmail setup,
including multiple-site or multidrop connections.
""", width=600).pack(side=TOP)
	Button(self, text='Expert Configuration',
				fg='blue', command=self.expert).pack()

	Message(self, text="""
Or you can just select `Quit' to leave the configurator now.
""", width=600).pack(side=TOP)
	Button(self, text='Quit', fg='blue', command=self.leave).pack()

    def novice(self):
	self.destroy()
	ConfigurationEdit(Fetchmailrc, self.outfile).edit('novice')

    def expert(self):
	self.destroy()
	ConfigurationEdit(Fetchmailrc, self.outfile).edit('expert')

    def leave(self):
        self.quit()

# Functions for turning a dictionary into an instantiated object tree.

def intersect(list1, list2):
# Compute set intersection of lists
    res = []
    for x in list1:
	if x in list2:
	    res.append(x)
    return res

def setdiff(list1, list2):
# Compute set difference of lists
    res = []
    for x in list1:
	if not x in list2:
	    res.append(x)
    return res

def copy_instance(toclass, fromdict):
# Initialize a class object of given type from a conformant dictionary.
    for fld in fromdict.keys():
        if not fld in dictmembers:
            dictmembers.append(fld)
# The `optional' fields are the ones we can ignore for purposes of
# conformability checking; they'll still get copied if they are
# present in the dictionary.
    optional = ('interface', 'monitor', 'netsec');
    class_sig = setdiff(toclass.__dict__.keys(), optional)
    class_sig.sort()
    dict_keys = setdiff(fromdict.keys(), optional)
    dict_keys.sort()
    common = intersect(class_sig, dict_keys)
    if 'typemap' in class_sig: 
	class_sig.remove('typemap')
    if tuple(class_sig) != tuple(dict_keys):
	print "Fields don't match what fetchmailconf expected:"
#	print "Class signature: " + `class_sig`
#	print "Dictionary keys: " + `dict_keys`
	diff = setdiff(class_sig, common)
        if diff:
            print "Not matched in class `" + toclass.__class__.__name__ + "' signature: " + `diff`
        diff = setdiff(dict_keys, common)
        if diff:
            print "Not matched in dictionary keys: " + `diff`
	sys.exit(1)
    else:
	for x in dict_keys:
	    setattr(toclass, x, fromdict[x])

#
# And this is the main sequence.  How it works:  
#
# First, call `fetchmail --configdump' and trap the output in a tempfile.
# This should fill it with a Python initializer for a variable `fetchmailrc'.
# Run execfile on the file to pull fetchmailrc into Python global space.
# You don't want static data, though; you want, instead, a tree of objects
# with the same data members and added appropriate methods.
#
# This is what the copy_instance function() is for.  It tries to copy a
# dictionary field by field into a class, aborting if the class and dictionary
# have different data members (except for any typemap member in the class;
# that one is strictly for use by the MyWidget supperclass).
#
# Once the object tree is set up, require user to choose novice or expert
# mode and instantiate an edit object for the configuration.  Class methods
# will take it all from there.
#
# Options (not documented because they're for fetchmailconf debuggers only):
# -d: Read the configuration and dump it to stdout before editing.  Dump
#     the edited result to stdout as well.
# -f: specify the run control file to read.

if __name__ == '__main__': 

    fetchmail_gif =\
'R0lGODdhPAAoAPcAAP///wgICBAQEISEhIyMjJSUlKWlpa2trbW1tcbGxs7Ozufn5+/v7//39yEY\012GNa9tUoxKZyEe1o5KTEQAN7OxpyMhIRjUvfn3pxSKYQ5EO/Wxv/WvWtSQrVzSmtCKWspAMatnP/e\012xu+1jIxSKaV7Wt6ca5xSGK2EY8aUa72MY86UY617UsaMWrV7SpRjOaVrOZRaKYxSIXNCGGs5EIRC\012CJR7Y/+UMdbOxnNrY97Ove/Wvd7GrZyEa961jL2Ua9alc86ca7WEUntSKcaMSqVjGNZ7GGM5CNa1\012jPfOnN6tc3taMffeve/WtWtaQv/OjGtSMYRzWv/erda1hM6te7WUY62MWs61jP/vzv/ntda9jL2l\012czEhAO/n1oyEc//elDEpGEo5EOfexpyUe+/epefevffvxnNrQpyUStbWzsbGvZyclN7ezmNjWv//\0125/f33qWllNbWve/vzv//1ufnve/vvf//xvf3vefnrf//taWlc0pKMf//pbW1Y///jKWlWq2tWsbG\012Y///c97eUvf3Ut7nc+/3a87We8bOjOfv1u/37/f//621tb3Gxtbn52Nra87n53uUlJTv/6W9xuf3\012/8bW3iExOXu11tbv/5TW/4TO/63e/zmt/1KUxlK1/2u9/wCM/73GzrXG1gBKjACE/87e72NzhCkx\012OaXO92OMtUql/xCE/wApUtbe57W9xnN7hHut52Ot/xBSnABKnABavQB7/2ul7zF71gBr77XO73Oc\0121lqc9yFSlBApSimE/wAYOQApY0J7zlKM5wAxhABS1gBj/6W95wAhWgA5nAAYSgBS7wBS/wBK9wAp\012jABC5wBK/wApnABC/wApxgAhtYSMtQAQYwAp/3OE74SMxgAYxlpjvWNr70pS/wgQ3sbGzs7O1qWl\0123qWl70pKe0JC/yEhlCkp/wgI/wAAEAAAIQAAKQAAOQAASgAAUgAAYwAAawAAlAAAnAAApQAArQAA\012zgAA1gAA5wAA9wAA/0pC/xgQ52Na9ykhe4R7zikhYxgQSjEpQgAAACwAAAAAPAAoAAAI/wABCBxI\012sKDBgwgTKiRIYKHDhxARIvgXsaLFhGgEUBSYoKPHjyBDihxJkuS/kwNLqlzJcuTJjQBaypxpEiVH\012mjhxvkyZs2fLnTd9ehxAtKjRo0ZrwhTasUsENhYHKOUpk1E3j11mxCBiQVLEBlJd2owp9iVRjwUs\012zMCQ5IcLD4saPVxjIKxIoGTvvqSoyFEFGTBeqEhyxAoSFR/USGKVcEGBAwDshsSr1OYTEyhQpJiS\012ZcoUKWOQtJDRJFSaggzUGBgoGSTlsjahlPCRIkWVKT16THHRIoqIISBIEUgAYIGBhgRbf3ytFygU\012FZp9UDmxQkkMCRwyZKDBQy4aApABhP8XqNwj88l7BVpQYZtF5iArWgwAgGZBq24HU7OeGhQ90PVA\012aKZZCiiUMJ9ArSTEwGqR8ZeXfzbV0MIIMQTBwoUdxDDfAm8sZFyDZVEF4UYSKBEBD0+k6IEFPMxH\0123FzldXSea+kBgANJSOWIlIMhXZXAXv+c1WM3PuJEpH8iuhbAkv+MdENPRHaTRkdF/jiWSKCAwlKW\012VbbkY5Q0LgUSKExgoYBKCjCxARpdltQNKHaUoYAddnR53lVRnJLKBWh4RIEGCZx5FSOv1OLNDUVe\012deZHaWiZAB35fIOGNtbEUeV5oGAByzPOrBPFGt3kwEgxITACSg5oLGGLMg60oQAjaNz/oAAcN4Ai\012a0c3kHFDK3jYsw4g9sRzBgPLXdkRrBrQ8gsWQUxCCRZX9IJNBQ1s8IgCdeBCzBYN6IBIN2TUsQYd\012dXhDBxdzlAHOHHKEcocZdWwDjx8MTCmjsR2FMAstw1RyiSzHqPLALaOwk8QmzCzDCSi0xJKMMk4E\012Yw8389iTDT32GAKOPf7YY0Aa9tATyD3w/EGsefgmgEYUtPiChLKWQDMBJtEUgYkzH2RiTgGfTMCI\012Mlu0Yc85hNiDziH2tMqOGL72QY47gshLb7Fi4roELcjoQIsxWpDwQyfS2OCJMkLI4YUmyhgxSTVg\012CP2FHPZ80UDcieBjStNPD5LPOyZT/y0iHGiMwswexDSzRiRq6KIMJBc4M8skwKAyChia2KPH3P24\012YU8/lFhOTj152OPOHuXMU4g48vCRiN/9rZGLMdS4csUu1JzDgxuipOMDHMKsAwEnq/ByzTrrZMNO\012OtO0k84+7KjzBjzplMJOOOOoo8846/ATxqJWinkkGUyEkMAaIezABQM3bMAEK1xEsUMDGjARRxhY\012xEGGHfPjEcccca6BRxhyuEMY7FCHMNDhf9140r2qRiVvdENQ3liUArzREW/0qRsRVIAGFfBADnLw\012gUSiYASJpMEHhilJTEnhAlGoQqYAZQ1AiqEMZ0jDGtqQImhwwA13yMMevoQAGvGhEAWHGMOAAAA7\012'

    # Process options
    (options, arguments) = getopt.getopt(sys.argv[1:], "df:")
    dump = rcfile = None;
    for (switch, val) in options:
        if (switch == '-d'):
            dump = TRUE
        elif (switch == '-f'):
            rcfile = val

    # Get client host's FQDN
    hostname = socket.gethostbyaddr(socket.gethostname())[0]

    # Compute defaults
    ConfigurationDefaults = Configuration()
    ServerDefaults = Server()
    UserDefaults = User()

    # Read the existing configuration
    tmpfile = "/tmp/fetchmailconf." + `os.getpid()`
    if rcfile:
        cmd = "fetchmail -f " + rcfile + " --configdump >" + tmpfile
    else:
        cmd = "fetchmail --configdump >" + tmpfile
        
    try:
        s = os.system(cmd)
	if s != 0:
            print "`" + cmd + "' run failure, status " + `s`
            raise SystemExit
    except:
        print "Unknown error while running fetchmail --configdump"
        os.remove(tmpfile)
        sys.exit(1)

    try:
        execfile(tmpfile)
    except:
        print "Can't read configuration output of fetchmail --configdump."
        os.remove(tmpfile)
        sys.exit(1)
        
    os.remove(tmpfile)

    # The tricky part -- initializing objects from the configuration global
    # `Configuration' is the top level of the object tree we're going to mung.
    # The dictmembers list is used to track the set of fields the dictionary
    # contains; in particular, we can use it to tell whether things like the
    # monitor, interface, and netsec fields are present.
    dictmembers = []
    Fetchmailrc = Configuration()
    copy_instance(Fetchmailrc, fetchmailrc)
    Fetchmailrc.servers = [];
    for server in fetchmailrc['servers']:
	Newsite = Server()
	copy_instance(Newsite, server)
	Fetchmailrc.servers.append(Newsite)
	Newsite.users = [];
	for user in server['users']:
	    Newuser = User()
	    copy_instance(Newuser, user)
	    Newsite.users.append(Newuser)

    # We may want to display the configuration and quit
    if dump:
        print "This is a dump of the configuration we read:\n"+`Fetchmailrc`

    # The theory here is that -f alone sets the rcfile location,
    # but -d and -f together mean the new configuration should go to stdout.
    if not rcfile and not dump:
        rcfile = os.environ["HOME"] + "/.fetchmailrc"

    # OK, now run the configuration edit
    root = MainWindow(rcfile)
    root.mainloop()

# The following sets edit modes for GNU EMACS
# Local Variables:
# mode:python
# End: