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From vixie@pa.dec.com Thu Jul 23 18:17:39 1992
Received: from relay2.UU.NET by rodan.UU.NET with SMTP
(5.61/UUNET-mail-drop) id AA14854; Thu, 23 Jul 92 18:17:30 -0400
Received: from inet-gw-2.pa.dec.com by relay2.UU.NET with SMTP
(5.61/UUNET-internet-primary) id AA06917; Thu, 23 Jul 92 18:17:37 -0400
Received: by inet-gw-2.pa.dec.com; id AA25454; Thu, 23 Jul 92 15:17:29 -0700
Received: by usenet.pa.dec.com; id AA02987; Thu, 23 Jul 92 15:17:28 -0700
Date: Thu, 23 Jul 92 15:17:28 -0700
From: vixie@pa.dec.com (Paul Vixie)
Message-Id: <9207232217.AA02987@usenet.pa.dec.com>
To: rsalz@uunet.UU.NET
Subject: well then here's my code - use it, abuse it, or lose it; whatever
Status: RO
#! /usr/bin/perl
# mailpost - yet another mail-to-news filter
# vixie 30jun92 [added -a and -d]
# vixie 17jun92 [attempt simple-minded fixup to $path]
# vixie 14jun92 [original]
#
# $Submit is a program which takes no arguments and whose stdin is supposed
# to be a news article (without the #!rnews header but with the news hdr).
#
$Submit = '/usr/lib/newsbin/input/rnews';
#
# the name we qualify sender addresses with is either the "mailname" from
# the news transport, or the /bin/hostname.
#
if (-r '/usr/lib/news/mailname') {
chop($Mailname = `cat /usr/lib/news/mailname`);
} else {
chop($Mailname = `/bin/hostname`);
}
#
# our command-line argument(s) are the list of newsgroups to post to.
#
# there may be a "-r sender" or "-f sender" which becomes the $path
# (which is in turn overridden below by various optional headers.)
#
# -d (distribution) and -a (approved) are also supported to supply
# or override the mail headers by those names.
#
$path = 'nobody';
$newsgroups = undef;
$approved = undef;
$distribution = undef;
while ($#ARGV != -1) {
$_ = shift(@ARGV);
if (/^\-[rf]$/) {
$path = shift(@ARGV);
print STDERR "((path: $path))\n";
next;
}
if (/^\-a$/) {
$approved = &fix_sender_addr(shift(@ARGV));
print STDERR "((approved: $approved))\n";
next;
}
if (/^\-d$/) {
$distribution = shift(@ARGV);
print STDERR "((distribution: $distribution))\n";
next;
}
$newsgroups .= ',' if $newsgroups;
$newsgroups .= $_;
}
die "usage: $0 newsgroup [newsgroup]\n" unless $newsgroups;
#
# do the header. our input is a mail message, with or without the From_
#
$real_news_hdrs = '';
$weird_mail_hdrs = '';
$from = undef;
$date = undef;
$_ = <STDIN>;
die "empty input" unless $_;
chop $_;
$prefetch = undef;
if (/^From\s+([^\s]+)\s+/) {
$path = $1;
print STDERR "((path: $path))\n";
$_ = $';
if (/ remote from /) {
$path = $'.'!'.$path;
$_ = $`;
}
$date = $_;
} else {
$prefetch = $_;
}
for (;;) {
# XXX - ick. we should be dealing with multiline headers here.
if ($prefetch) {
$_ = $prefetch;
$prefetch = undef;
} else {
$_ = <STDIN>;
last unless $_; # EOF? (no chop yet)
chop $_;
}
print STDERR "($_)\n";
last unless $_; # end-of-header (already chopped)
next if (/^Approved:\s/io && defined($approved));
next if (/^Distribution:\s/io && defined($distribution));
if (/^(Message-Id|Subject|Organization|Distribution):\s*/io) {
$real_news_hdrs .= "$_\n";
next;
}
if (/^(Sender|Reply-To|Approved):\s*/io) {
$real_news_hdrs .= "$`$&".&fix_sender_addr($')."\n";
next;
}
if (/^Return-Path:\s*/io) {
$path = $';
$path = $1 if ($path =~ /\<([^\>]*)\>/);
print "((path: $path))\n";
next;
}
if (/^Date:\s*/io) {
$date = $';
next;
}
if (/^From:\s*/io) {
$from = &fix_sender_addr($');
next;
}
# random unknown header. prepend 'X-' if it's not already there.
$_ = "X-$_" unless (/^X-/io);
$weird_mail_hdrs .= "$_\n";
}
die "no From: found" unless $from;
die "no Date: found" unless $date;
if ($path !~ /\!/) {
$path = "$'!$`" if ($path =~ /\@/);
}
$real_news_hdrs .= "Approved: ${approved}\n" if defined($approved);
$real_news_hdrs .= "Distribution: ${distribution}\n" if defined($distribution);
open(STDOUT, "|$Submit") || die "$Submit: $!";
print <<"EOF";
Newsgroups: ${newsgroups}
Path: ${path}
From: ${from}
${real_news_hdrs}Date: ${date}
${weird_mail_hdrs}
EOF
#
# do the body. we already wrote the blank line.
#
print <STDIN>;
#
# that's all, folks.
#
close(STDOUT);
exit 0;
#
# take 822-format name (either "comment <addr> comment" or "addr (comment)")
# and return in always-qualified 974-format ("addr (comment)").
#
sub fix_sender_addr {
local($_) = @_;
local($lcomment, $addr, $rcomment);
if (/\<([^\>]*)\>/) {
($lcomment, $addr, $rcomment) =
(&dltb($`), &dltb($1), &dltb($'));
} elsif (/\(([^\)]*)\)/) {
($lcomment, $addr, $rcomment) =
('', &dltb($`.$'), &dltb($1));
} else {
($lcomment, $addr, $rcomment) =
('', &dltb($_), '');
}
print STDERR "fix_sender_addr($_) == ($lcomment, $addr, $rcomment)\n";
$addr .= "@$Mailname" unless ($addr =~ /\@/);
if ($lcomment && $rcomment) {
$comment = $lcomment.' '.$rcomment;
} else {
$comment = $lcomment.$rcomment;
}
$_ = $addr;
$_ .= " ($comment)" if length($comment);
print STDERR "\t-> $_\n";
return $_;
}
#
# delete leading and trailing blanks
#
sub dltb {
local($_) = @_;
s/^\s+//;
s/\s+$//;
return $_;
}
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