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#!/usr/bin/perl -w
#------------------------------------------------------------------------
#
# $Sendmail: update_conf,v 8.14.4 2019-02-05 18:41:16 cowboy Exp $
#
# Parse and update /etc/mail/sendmail.conf and reflect its values in
# /etc/cron.d/sendmail and /etc/inetd.conf.
#
# Copyright (c) 2001-2010 Richard Nelson. All Rights Reserved.
#
#------------------------------------------------------------------------
#
use strict; # be kosher
use Cwd; # provide cwd()
use Env; # A few environmental references
use integer; # Peformance
use Sys::Hostname; # make sure we have a valid hostname
use Getopt::Long; # parameter handling
use FileHandle; # I/O
# Local libraries - for Debian Sendmail Perl helper functions
# BEGIN { $main::my_path = substr($0,$[,rindex($0,'/')) };
use lib ('.', substr($0,$[,rindex($0,'/')), "/usr/share/sendmail");
require Parse_conf;
require Parse_mc;
$main::program_name = $0; #'update_conf';
$main::program_version = '8.14.4';
$main::program_date = '2019-02-05 18:41:16 cowboy';
$main::debug = 0;
my $interp_pgm = "$^X";
my $interp_vrm = $];
$interp_vrm = ("$^V" | '000') if (defined $^V);
my $current_time = scalar localtime;
my $user = getlogin || (getpwuid($<))[0] || "Unknown!!";
my $hostname = hostname();
my $directory = getcwd();
my $Conffile = "/etc/mail/sendmail.conf";
my $output_file = '';
my $ofh = new FileHandle;
my $debug = 0;
#
#------------------------------------------------------------------------------
# Global variables
#------------------------------------------------------------------------------
#
#------------------------------------------------------------------------------
# Finally, some code (almost)
#------------------------------------------------------------------------------
#
# Argument handling...
$main::opt_help='';
$main::opt_output_file='';
$main::opt_input_file='';
$main::opt_debug='';
$main::opt_test='';
$main::opt_static='';
my @options = qw(
help|h
output-file|output_file|o:s
input-file|input_file|i:s
debug!
test!
static!
);
my $result = GetOptions(@options);
if ( ! $result ) {
die "Terminating due to parameter error";
};
if ( $main::opt_help ) {
warn "$main::program_name $main::program_version $main::program_date\n";
warn "$0 \n";
warn " -help\n" if $main::opt_help;
warn " -debug\n" if $main::opt_debug;
warn " -test\n" if $main::opt_debug;
warn " -static\n" if $main::opt_static;
warn " -o $main::opt_output_file\n" if $main::opt_output_file;
warn " -i $main::opt_input_file\n" if $main::opt_input_file;
exit 0;
};
if ( $main::opt_test ) {
&sm2cron_time("");
&sm2cron_time("6s");
&sm2cron_time("5m");
&sm2cron_time("4h");
&sm2cron_time("3d");
&sm2cron_time("2w");
&sm2cron_time("2w3d4h5m6s");
&sm2cron_time("89s");
&sm2cron_time("90m");
&sm2cron_time("150m");
&sm2cron_time("125");
&sm2cron_time("31d");
&sm2cron_time("35d");
&sm2cron_time("5w");
&sm2cron_time("9w");
exit 0;
};
$output_file = $main::opt_output_file if ($main::opt_output_file);
my $input_file = $main::opt_input_file || $Conffile;
# $main::debug is used in Parse_mc !
$main::debug = $main::opt_debug || $main::debug;
# Read /etc/mail/sendmail.conf (if extant)
&Parse_conf::read_config($Conffile);
# [Re]write /etc/mail/sendmail.config
&Parse_conf::write_config($Conffile);
my ($ok, $value) = &Parse_conf::get_value('HANDS_OFF');
if ($value ne '0') {
unlink "/etc/cron.d/sendmail";
exit;
};
# Reflect settings in /etc/cron.d/sendmail
&write_crontab;
if ( $output_file eq '' ) {
chown '0', '0', "/etc/cron.d/sendmail";
chmod 0644, "/etc/cron.d/sendmail";
};
# Reflect settings in /etc/inetd.conf
&update_inetd;
# Create/Delete files
&update_files;
exit (0);
#
#------------------------------------------------------------------------
# Check for nullclient mode in /etc/mail/sendmail.mc
#------------------------------------------------------------------------
sub check_nullclient {
my $nullclient = 0;
my $in_file = "/etc/mail/sendmail.mc";
if ( -r $in_file ) {
my $ifh;
unless ( open($ifh, "<$in_file") ) {
warn("Could not open $in_file($!), ignoring it.\n");
};
line: while (<$ifh>) {
next line if /^$/; # skip empty lines
next line if /^#/; # skip comments
next line if /^dnl /; # skip comments
chomp; # drop tailing \n
if (/^\s*FEATURE\(\s*`?nullclient/) {
$nullclient = 1;
last line;
};
};
};
return $nullclient;
};
#
#------------------------------------------------------------------------
# Compute time setting for Crontab entry (simplistic)
# NOTE: It does the basics pretty darned well... *BUT*
# It fails, miserably, on things that would multiple lines:
# 90 minutes: does it at 30 minutes (90-60)
# Or are just edge conditions:
# 25 hours: treated as 24 hours
# 35 days: does it the 7rd of every month (35-28)
#------------------------------------------------------------------------
sub sm2cron_time {
my $month = 0;
my $week = 0;
my $day = 0;
my $hour = 0;
my $minute = 0;
my $second = 0;
my $tmp = 0;
my $t = '';
my $cron = '';
my ($sm) = @_;
my $seconds = 0;
my $elapsed = 0;
my $randstart = '00';
if ($sm eq '') {
if ( $main::opt_test ) {
print "mm hh dom mon dow = sm2cron_time($sm);\n";
};
return ($cron, $seconds);
};
# Convert sendmail time
# 1w2d3h4m5s
# to cron time
# m h dom mon dow
$t = $sm;
if ( $t =~ /^\d+$/ ) {
$minute = $sm; }
else {
($week = $sm) =~ s/.*?(\d+)w.*/$1/ if ( $t =~ /w/ );
($day = $sm) =~ s/.*?(\d+)d.*/$1/ if ( $t =~ /d/ );
($hour = $sm) =~ s/.*?(\d+)h.*/$1/ if ( $t =~ /h/ );
($minute = $sm) =~ s/.*?(\d+)m.*/$1/ if ( $t =~ /m/ );
($second = $sm) =~ s/.*?(\d+)s.*/$1/ if ( $t =~ /s/ );
}
# Rationalize the time
$seconds = ($week * 7 * 24 * 60 * 60)
+ ($day * 24 * 60 * 60)
+ ($hour * 60 * 60)
+ ($minute * 60)
+ $second;
$elapsed = $seconds;
$month = $seconds / (4 * 7 * 24 * 60 * 60);
$seconds = $seconds % (4 * 7 * 24 * 60 * 60);
$week = $seconds / (7 * 24 * 60 * 60);
$seconds = $seconds % (7 * 24 * 60 * 60);
$day = $seconds / (24 * 60 * 60);
$seconds = $seconds % (24 * 60 * 60);
$hour = $seconds / (60 * 60);
$seconds = $seconds % (60 * 60);
$minute = $seconds / (60);
$seconds = $seconds % (60);
$second = $seconds;
# Cron doesn't do seconds, round to minutes or ignore
$minute = $minute + 1 if ($second > 30);
# Minute of hour (0-59)
$minute = sprintf("%02d", $minute);
$randstart = sprintf("%02d", int(rand(60))) if (!$main::opt_static);
if (0 < $hour + $day + $week + $month) {
if (1 >= $minute) {
$cron = "$randstart "; }
else {
$cron = "$minute "; }
}
elsif (1 >= $minute) {
$cron = "* ";
}
else {
$cron = "*/$minute";
};
# Hour of day (0-23)
$hour = sprintf("%02d", $hour);
$randstart = sprintf("%02d", int(rand(24))) if (!$main::opt_static);
if (0 < $day + $week + $month) {
if (1 >= $hour) {
$cron = "$cron $randstart "; }
else {
$cron = "$cron $hour "; }
}
elsif (1 >= $hour) {
$cron = "$cron * ";
}
else {
$cron = "$cron */$hour";
};
# Day of month (1-31)
$day = $day + (7 * $week);
$day = sprintf("%02d", $day);
$randstart = 1 + sprintf("%02d", int(rand(31))) if (!$main::opt_static);
if (0 < $month) {
if (1 >= $day) {
$cron = "$cron $randstart "; }
else {
$cron = "$cron $day "; }
}
elsif (1 >= $day) {
$cron = "$cron * ";
}
else {
$cron = "$cron */$day";
};
# Month in year (1-12)
$month = sprintf("%02d", $month);
$randstart = 1 + sprintf("%02d", int(rand(12))) if (!$main::opt_static);
if (1 >= $month) {
$cron = "$cron * ";
}
else {
$cron = "$cron */$month";
};
$cron = "$cron *"; # Day of week (0-7)
if ( $main::opt_test ) {
print "$cron = sm2cron_time($sm);\n";
};
return ($cron, $elapsed);
};
#
#------------------------------------------------------------------------
# Write updated cron file
#------------------------------------------------------------------------
sub write_crontab {
my $var;
my $interval = '';
my $cronint = '';
my $test = "test -x /etc/init.d/sendmail";
my $command = '';
my $ok = '';
my $mailto = '';
my $mmode = '';
my $qmode = '';
my $msp_line = '';
my $mta_line = '';
my $age_line = '';
($ok, $mailto) = &Parse_conf::get_value('CRON_MAILTO');
if ( ! $ok ) {
return;
};
my $out_file = $output_file || "/etc/cron.d/sendmail";
print STDOUT "Writing $out_file.\n";
$out_file = '&STDOUT' if ($out_file eq '-');
unless ( open($ofh, ">$out_file") ) {
warn("Could not open $out_file($!), using STDOUT\n");
open($ofh, ">&STDOUT");
};
$out_file = '-' if ($out_file eq '&STDOUT');
print $ofh <<"EOT";
####################################################################
##### This file is automagically generated -- edit at your own risk
#####
##### file: ${out_file}
##### generated via: (${interp_pgm} ${interp_vrm})
##### ${main::program_name}
##### version: ${main::program_version} ${main::program_date}
##### by: ${user}\@${hostname}
##### on: ${current_time}
##### in: ${directory}
##### input files:
EOT
foreach my $file ( split(' ', $input_file) ) {
print $ofh <<"EOT";
##### ${file}
EOT
};
print $ofh <<"EOT";
#####
####################################################################
#------------------------------------------------------------------------------
#
# $out_file
#
# Copyright (c) 2001-2010 Richard Nelson. All Rights Reserved.
# Version: ${main::program_version}
# Time-stamp: <${main::program_date}>
#
# Sendmail crontab - Call sendmail at various times to do the following:
# 1) Age queues - move undelivered mail to a slower queue
# 2) Retry any mail queued by the message submission process
# 3) run the queues (deliver mail) if a standalone daemon is not desired
#
# Each processes is independant and guided by /etc/mail/sendmail.conf and
# {sendmail,submit}.mc files.
#
# There isn't anything here that should need touching.
#
# Any requisite queue/misc parameters must be set in /etc/mail/sendmail.conf
# and reflected herein via /usr/sbin/sendmailconfig (or more directly via
# ${main::program_name}).
#
#------------------------------------------------------------------------------
#
# use default path, shell, home
#SHELL=/bin/sh
#PATH=
#HOME=
# send mail to this user, as `mail/smmsp` isn't real.
MAILTO=$mailto
#
# format of entries:
# m h dom mon dow user command
#
#------------------------------------------------------------------------------
# Every so often, give sendmail a chance to run the MSP queues.
#
EOT
($ok, $interval) = &Parse_conf::get_value('MSP_INTERVAL');
($cronint, $ok) = &sm2cron_time($interval);
$command = "$test && /usr/share/sendmail/sendmail cron-msp";
($ok, $mmode) = &Parse_conf::get_value('MSP_MODE');
($ok, $qmode) = &Parse_conf::get_value('QUEUE_MODE');
if ($mmode eq 'Cron'
and ($interval ne '')
#or ($mmode eq 'None' and $qmode eq 'Cron')
) {
$msp_line =
"$cronint\t\tsmmsp\t$command";
}
else {
$msp_line =
"#$cronint\t\tsmmsp\t$command";
};
print $ofh "$msp_line\n";
print $ofh <<"EOT";
#
#------------------------------------------------------------------------------
# Every so often, give sendmail a chance to run the MTA queues.
# Will also run MSP queues if enabled
#
EOT
($ok, $interval) = &Parse_conf::get_value('QUEUE_INTERVAL');
($cronint, $ok) = &sm2cron_time($interval);
$command = "$test && /usr/share/sendmail/sendmail cron-mta";
if ($qmode eq 'Cron'
and ($interval ne '')
) {
$mta_line =
"$cronint\t\troot\t$command";
}
else {
$mta_line =
"#$cronint\t\troot\t$command";
};
print $ofh "$mta_line\n";
print $ofh <<"EOT";
#
#------------------------------------------------------------------------------
# Every so often, give sendmail a chance to age the queues.
#
EOT
($ok, $var) = &Parse_conf::get_value('AGE_DATA');
my $tmpval = eval $var;
if ($@) {
warn $@;
}
else {
$var = $tmpval;
};
if (not ref $var) {
print $ofh "# No queue aging\n";
}
elsif (@{$var} == 0) {
print $ofh "# No queue aging\n";
}
else {
foreach my $entry (@{$var}) {
($interval, $ok) = &sm2cron_time(@$entry[0]);
my $criteria = @$entry[1] || join('','-s ',$ok);
my $to = @$entry[2];
my $from = @$entry[3];
$command = "$test && /usr/share/sendmail/qtool.pl";
$from = "/var/spool/mqueue/$from"
if ($from !~ /^\//);
$to = "/var/spool/mqueue/$to"
if ($to !~ /^\//);
$age_line =
"$interval\t\troot\t$command $criteria $to $from";
print $ofh "$age_line >/dev/null\n";
};
};
print $ofh <<"EOT";
#
EOT
close($ofh);
};
#
#------------------------------------------------------------------------
# Update /etc/inetd.conf file
#------------------------------------------------------------------------
sub update_inetd {
# Don't try to write if we're debugging
if ($output_file ne '') {
return;
};
my ($ok, $mode) = &Parse_conf::get_value('DAEMON_MODE');
if ( $ok and -x '/usr/sbin/update-inetd' ) {
if ( $mode eq 'Inetd' ) {
system 'update-inetd --group MAIL --enable smtp,smtps,submission'
}
else {
system 'update-inetd --group MAIL --disable smtp,smtps,submission'
};
};
};
#
#------------------------------------------------------------------------
# Update mail statistics information (create/delete files)
#------------------------------------------------------------------------
sub update_files {
# Don't try to write if we're debugging
if ($output_file ne '') {
return;
};
my ($class, $flags, $files, $options);
my ($ok, $stats);
my $file;
#
# Read the mc/m4 files
&Parse_mc::read_dbs('', '');
# Obtain entry for HOST_STATUS_DIRECTORY
($class, $flags, $files, $options) =
&Parse_mc::entry_dbs('confHOST_STATUS_DIRECTORY');
$file = @{$files}[0];
($ok, $stats) = &Parse_conf::get_value('DAEMON_HOSTSTATS');
if ( $ok and $file ne '-' ) {
if ( $stats and ! -d $file) {
print STDOUT "Enabling HOST statistics file($file).\n";
system "mkdir ${file}";
my $gid = getgrnam('smmsp');
chown '0', $gid, $file;
chmod 02755, $file;
}
elsif ( ! $stats and -d $file ) {
print STDOUT "Disabling HOST statistics file($file).\n";
system "rm -rf ${file}";
};
};
# Obtain entry for STATUS_FILE
($class, $flags, $files, $options) =
&Parse_mc::entry_dbs('STATUS_FILE');
$file = @{$files}[0];
($ok, $stats) = &Parse_conf::get_value('DAEMON_MAILSTATS');
if ( $ok and $file ne '-' ) {
if ( $stats and ! -e $file) {
print STDOUT "Enabling MTA statistics file($file).\n";
open 'STATS', ">$file";
close 'STATS';
my $gid = getgrnam('smmsp');
chown '0', $gid, $file;
chmod 0640, $file;
}
elsif ( ! $stats and -e $file ) {
print STDOUT "Disabling MTA statistics file($file).\n";
unlink $file;
};
};
# Obtain entry for MSP_STATUS_FILE
($class, $flags, $files, $options) =
&Parse_mc::entry_dbs('MSP_STATUS_FILE');
$file = @{$files}[0];
($ok, $stats) = &Parse_conf::get_value('MSP_MAILSTATS');
if ( $ok and $file ne '-') {
if ( $stats and ! -e $file ) {
print STDOUT "Enabling MSP statistics file($file).\n";
open 'STATS', ">$file";
close 'STATS';
my $gid = getgrnam('smmsp');
chown '0', $gid, $file;
chmod 0660, $file;
}
elsif ( ! $stats and -e $file ) {
print STDOUT "Disabling MSP statistics file($file).\n";
unlink $file;
};
};
};