/usr/lib/news/bin/innmail is in inn2 2.5.3-3ubuntu1.
This file is owned by root:root, with mode 0o755.
The actual contents of the file can be viewed below.
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use lib '/usr/share/perl5'; use INN::Config;
# Author: James Brister <brister@vix.com> -- berkeley-unix --
# Start Date: Fri, 25 Apr 1997 14:11:23 +0200
# Project: INN
# File: innmail.pl
# RCSId: $Id: innmail.in 9258 2011-07-17 18:20:50Z iulius $
# Description: A simple replacement for UCB Mail to avoid nasty security
# problems.
#
use strict;
use Getopt::Std;
$0 =~ s!.*/!!;
die "$0: No \$INN::Config::mta variable defined.\n"
if ! defined ($INN::Config::mta);
my $sm = $INN::Config::mta;
die "$0: MTA path is not absolute\n" unless ($sm =~ m!^/!);
my $usage = "usage: $0 -s subject addresses\n\n" .
"Reads stdin for message body\n";
my (%opt, @addrs);
getopts ("s:h", \%opt) || die $usage;
die $usage if $opt{'h'};
if ( !defined($opt{'s'}) ) {
warn "No subject given. Hope that's OK.\n";
$opt{'s'} = "NO SUBJECT";
} else {
$opt{'s'} =~ s/\n+\Z//;
}
# Fix up any addresses.
foreach ( @ARGV ) {
s![^-a-zA-Z0-9+_.@%]!!g;
push (@addrs, $_) if ($_ ne "");
}
die "$0: No addresses specified\n\n$usage" unless @addrs;
if ($sm =~ m!%s!) {
$sm = sprintf $sm, join (' ', @addrs);
} else {
$sm .= " " . join(' ', @addrs);
}
my @smarr = split(/\s+/, $sm);
(my $t = $INN::Config::mta) =~ s!\s.*!!;
die "$0: MTA variable definition is changed after substitution\n"
if ($t ne $smarr[0]);
die "$0: MTA excutable doesn't appear to exist: $smarr[0]\n"
if ! -x $smarr[0];
# Startup MTA without using the shell.
my $pid = open my $MTA, '|-';
if ($pid == 0) {
exec (@smarr) || die "$0: exec of $sm failed: $!\n";
} elsif ($pid < 0) {
die "$0: Fork failed: $!\n";
}
print $MTA "To: ", join (",\n\t", @addrs), "\n";
print $MTA "Subject: $opt{'s'}\n";
print $MTA "\n";
while (<STDIN>) {
print $MTA $_;
}
close $MTA;
exit;
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