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# Mail::Util.pm
#
# Copyright (c) 1995-8 Graham Barr <gbarr@pobox.com>. All rights reserved.
# This program is free software; you can redistribute it and/or
# modify it under the same terms as Perl itself.
package Mail::Util;
use strict;
use vars qw($VERSION @ISA @EXPORT_OK);
use AutoLoader ();
use Exporter ();
BEGIN {
require 5.000;
$VERSION = "1.16";
*AUTOLOAD = \&AutoLoader::AUTOLOAD;
@ISA = qw(Exporter);
@EXPORT_OK = qw(read_mbox maildomain mailaddress);
}
1;
sub Version { $VERSION }
=head1 NAME
Mail::Util - mail utility functions
=head1 SYNOPSIS
use Mail::Util qw( ... );
=head1 DESCRIPTION
This package provides several mail related utility functions. Any function
required must by explicitly listed on the use line to be exported into
the calling package.
=head2 read_mbox( $file )
Read C<$file>, a binmail mailbox file, and return a list of references.
Each reference is a reference to an array containg one message.
=head2 maildomain()
Attempt to determine the current uers mail domain string via the following
methods
Look for a sendmail.cf file and extract DH parameter
Look for a smail config file and usr the first host defined in hostname(s)
Try an SMTP connect (if Net::SMTP exists) first to mailhost then localhost
Use value from Net::Domain::domainname (if Net::Domain exists)
=head2 mailaddress()
Return a guess at the current users mail address. The user can force
the return value by setting C<$ENV{MAILADDRESS}>
=head1 AUTHOR
Graham Barr <gbarr@pobox.com>
=head1 COPYRIGHT
Copyright (c) 1995-8 Graham Barr. All rights reserved. This program is free
software; you can redistribute it and/or modify it under the same terms
as Perl itself.
=cut
__END__
sub read_mbox {
my $file = shift;
my @mail = ();
my $mail = [];
my $blank = 1;
local *FH;
local $_;
open(FH,"< $file") or
do {
require Carp;
Carp::croak("cannot open '$file': $!\n");
};
while(<FH>) {
if($blank && /\AFrom .*\d{4}/) {
push(@mail, $mail) if scalar(@{$mail});
$mail = [ $_ ];
$blank = 0;
}
else {
$blank = m#\A\Z#o ? 1 : 0;
push(@{$mail}, $_);
}
}
push(@mail, $mail) if scalar(@{$mail});
close(FH);
return wantarray ? @mail : \@mail;
}
sub maildomain {
##
## return imediately if already found
##
return $domain
if(defined $domain);
##
## Try sendmail config file if exists
##
local *CF;
local $_;
my @sendmailcf = qw(/etc
/etc/sendmail
/etc/ucblib
/etc/mail
/usr/lib
/var/adm/sendmail);
my $config = (grep(-r, map("$_/sendmail.cf", @sendmailcf)))[0];
if(defined $config && open(CF,$config)) {
my %var;
while(<CF>) {
if(/\AD([a-zA-Z])([\w.]+)/) {
my($v,$arg) = ($1,$2);
$arg =~ s/\$([a-zA-Z])/exists $var{$1} ? $var{$1} : '$' . $1/eg;
$var{$v} = $arg;
}
}
close(CF);
$domain = $var{'j'} if defined $var{'j'};
$domain = $var{'M'} if defined $var{'M'};
return $domain
if(defined $domain);
}
##
## Try smail config file if exists
##
if(open(CF,"/usr/lib/smail/config")) {
while(<CF>) {
if(/\A\s*hostnames?\s*=\s*(\S+)/) {
$domain = (split(/:/,$1))[0];
last;
}
}
close(CF);
return $domain
if(defined $domain);
}
##
## Try a SMTP connection to 'mailhost'
##
if(eval { require Net::SMTP }) {
my $host;
foreach $host (qw(mailhost localhost)) {
my $smtp = eval { Net::SMTP->new($host) };
if(defined $smtp) {
$domain = $smtp->domain;
$smtp->quit;
last;
}
}
}
##
## Use internet(DNS) domain name, if it can be found
##
unless(defined $domain) {
if(eval { require Net::Domain } ) {
$domain = Net::Domain::domainname();
}
}
$domain = "localhost"
unless(defined $domain);
return $domain;
}
sub mailaddress {
##
## Return imediately if already found
##
return $mailaddress
if(defined $mailaddress);
##
## Get user name from environment
##
$mailaddress = $ENV{MAILADDRESS};
unless ($mailaddress || $^O ne 'MacOS') {
require Mac::InternetConfig;
Mac::InternetConfig->import();
$mailaddress = $InternetConfig{kICEmail()};
}
$mailaddress ||= $ENV{USER} ||
$ENV{LOGNAME} ||
eval { (getpwuid($>))[6] } ||
"postmaster";
##
## Add domain if it does not exist
##
$mailaddress .= '@' . maildomain()
unless($mailaddress =~ /\@/);
$mailaddress =~ s/(^.*<|>.*$)//g;
$mailaddress;
}
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