#!/usr/bin/perl -w
$|=1;

# Copyright (C) 1997-1998 Johnie Ingram <johnie@debian.org>.

# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation; either version 2 of the License, or
# (at your option) any later version.

# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
# GNU General Public License for more details.

# You should have received a copy of the GNU General Public License
# along with this program; if not, write to the Free Software
# Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.


$HTTPD_CONF="/etc/apache/httpd.conf";
$HTTPD_EX="/usr/doc/apache/examples/httpd.conf";
$ACCESS_CONF="/etc/apache/access.conf";
$ACCESS_EX="/usr/doc/apache/examples/access.conf";
$SRM_CONF="/etc/apache/srm.conf";
$SRM_EX="/usr/doc/apache/examples/srm.conf";
$CRON_CONF="/etc/apache/cron.conf";
$CRON_EX="/usr/doc/apache/examples/cron.conf";
$MIME_CONF="/etc/apache/mime.types";
$MAILNAME_CONF="/etc/mailname";
$ALIASES_CONF="/etc/aliases";
$HOME_EX="/usr/doc/apache/intro.html";

$SERVER_ROOT="/etc/apache";
$PID_FILE="/var/run/apache.pid";

$write_httpdconf = 0;
$write_accessconf = 0;
$write_srmconf = 0;
$write_aliasesconf = 0;
$fix_webmaster = 0;
$changed = 0;
$q = 1;

use Getopt::Long;

$opt_assert_perl = 0;
$opt_force = 0;
$opt_force_modules = 0;
$opt_update = 0;

chomp ($arch = `dpkg --print-installation-architecture`);
chomp ($mailname = (-e $MAILNAME_CONF)
       ? `cat $MAILNAME_CONF` : "localhost");


###########################################################################


sub load_config_files ()
{
    $main::httpdconf = `cat $HTTPD_CONF`;
    $main::accessconf = `cat $ACCESS_CONF`;
    $main::srmconf = `cat $SRM_CONF`;
    $main::allconf = "$httpdconf\n$accessconf\n$srmconf";
    ($main::nonvirtconf = $allconf) =~ s/\n\s*<Virtual.*VirtualHost>//gs;
    $main::aliasesconf = `cat $ALIASES_CONF 2> /dev/null`;
    $main::servername = loadconf ("ServerName", "localhost");
    $main::serveradmin = loadconf ("ServerAdmin", "webmaster");
    $main::serveruser = loadconf ("User", "www-data");
    $main::servergroup = loadconf ("Group", "www-data");
    chomp (my $tmproot = `egrep "^www-data:" /etc/passwd | cut -f 6 -d :`);
    $tmproot = "/var/www" if ($tmproot eq "");
    $main::documentroot = loadconf ("DocumentRoot",
				    $tmproot, $SRM_CONF);
    $main::serverport = loadconf ("Port", "80");
    $main::version = system ("apache -l > /dev/null 2>&1")
	? "1.1" : "1.3";
    $main::version = "1.3" if (-f "/usr/lib/apache/1.3/libhttpd.so");

    $main::serveruser =~ s/\#//g;
    $main::servergroup =~ s/\#//g;
    $main::servergroup = "www-data" if $main::servergroup =~ m/-/;
}


sub yorn ($;$)
{
    $main::changed = 0;
    my $result = $_[0];
    my $morearg = "";
    print $_[1] if defined $_[1];
    ($result) ? print " [Y/n] " : print " [y/N] ";
    $arg = <STDIN>;
    $result = 1 if ($arg =~ /^y/i);
    $result = 0 if ($arg =~ /^n/i);
    $q = 0 if ($arg =~ /q/i);
    $main::changed = 1 unless ($result == $_[0]);
    return $result;
}


sub answer ($;$)
{
    $main::changed = 0;
    my $arg;
    my $default = $_[0];
    print $_[1] if defined $_[1];
    print " [$default] " if (defined ($default) && $default ne "");
    chomp ($arg = `read REPLY; echo \$REPLY`);
    if ($arg ne "")
    {
	$main::changed = 1;
	return $arg;
    }
    return $default;
}


sub loadconf ($$;$)
{
    my $parameter = $_[0];
    my $default = $_[1];

    my $file = (defined ($_[2]) ? $_[2] : "$HTTPD_CONF");
    my $in = `egrep "^[:space:]*$parameter " $file 2> /dev/null| head -1`;
    $in =~ s/\s*$parameter //;
    chomp ($in);
    return $in if ($in ne "");
    return $default;
}


sub ensure_files ()
{
    system ("mkdir -m 755 --parents /etc/apache");
    if (! -e $HTTPD_CONF)
    {
	print "Installing new configuration file $HTTPD_CONF ...\n";
	system ("cp $HTTPD_EX $HTTPD_CONF") && exit 1;
    }
    if (! -e $ACCESS_CONF)
    {
	print "Installing new configuration file $ACCESS_CONF ...\n";
	system ("cp $ACCESS_EX $ACCESS_CONF") && exit 1;
    }
    if (! -e $SRM_CONF)
    {
	print "Installing new configuration file $SRM_CONF ...\n";
	system ("cp $SRM_EX $SRM_CONF") && exit 1;
    }
    if (! -e $CRON_CONF)
    {
	print "Installing new configuration file $CRON_CONF ...\n";
	system ("cp $CRON_EX $CRON_CONF") && exit 1;
    }
    if (! -e $MIME_CONF)
    {
	print "\nError: $MIME_CONF not found.\n";
	print "Install the mime-support package, or copy the mime.types ";
	print "from\n/usr/doc/apache/conf/mime.types.\n\n";
	exit 1;
    }
    if (! -x "/usr/bin/savelog")
    {
	print "\nError: /usr/bin/savelog not found.\n";
	print "Are you sure you're running a Debian system?   :-)\n\n";
	exit 1;
    }
    if (! -w $HTTPD_CONF)
    {
	print "\nError: $HTTPD_CONF not writable by userid.\n";
	print "Who do you think you are, root?   :-)\n\n";
	exit 1;
    }
}


sub make_corrections ()
{
    my $icons = "/usr/share/apache/icons/";
    my $oldcbin = "/usr/lib/httpd/cgi-bin";
    my $cbin = "/usr/lib/cgi-bin";
    my $doc = "/usr/doc/";

    if (! ($httpdconf =~ m/^\s*ServerRoot\s+$SERVER_ROOT/m))
    {
	print "Correcting ServerRoot to $SERVER_ROOT in httpd.conf.\n";
	$httpdconf =~ s/^\s*ServerRoot.*/ServerRoot $SERVER_ROOT/m;
	$write_httpdconf++;
    }
    if (! ($srmconf =~ m/^\s*Alias\s+\/icons\/\s+$icons/m))
    {
	if (yorn (1, "\nThe icons Alias specifed in srm.conf is non-standard.  Fix?"))
	{
	    print "Correcting Alias to $icons in srm.conf.\n";
	    $srmconf =~ s/^\s*Alias\s+\/icons\/.*/Alias \/icons\/ $icons/m;
	    $write_srmconf++;
	}
    }
    if (! ($srmconf =~ m/^\s*ScriptAlias\s+\/cgi-bin\/\s+$cbin\//m))
    {
	if (yorn (1, "\nThe cgi-bin ScriptAlias specifed in srm.conf is non-standard.  Fix?"))
	{
	    print "Correcting ScriptAlias to $cbin/ in srm.conf.\n";
	    $srmconf =~
		s/^\s*ScriptAlias\s+\/cgi-bin\/.*/ScriptAlias \/cgi-bin\/ $cbin\//m;
	    $write_srmconf++;
	}
    }
    if (! ($srmconf =~ m/.*Alias\s+\/doc\/\s+$doc/m))
    {
	if ($srmconf =~ m/^\s*Alias\s+\/doc/m)
	{
	    print "Disabling...you need to rename your existing \/doc alias in srm.conf!\n";
	    $srmconf =~ s/^\s*Alias\s+\/doc(.*)/\n\#\# FIXME \#\# Alias \/doc$1\n\#\# The above line conflicts with webstandard 3.0, which specifies that \/doc\n\#\# refers to \/usr\/doc.  Some packages may not work otherwise. -- apacheconfig\n\n/m;
	}
	print "Adding alias /doc/ -> $doc to srm.conf (for Debian docs).\n";
	$srmconf =~ s/$/\n\n\# Added for Debian GNU\/Linux docs (webstandard 3.0).\n/s;
	$srmconf =~ s/$/Alias \/doc\/ $doc\n/s;
	$write_srmconf++;
    }
    if ($accessconf =~ m/.*Directory $oldcbin/m)
    {
	print "Correcting $oldcbin to $cbin in access.conf.\n";
	$accessconf =~ s/$oldcbin/$cbin/mg;
	$write_accessconf++;
    }
    if ($httpdconf =~ m/.*\/var\/log\/apache-httpd/m)
    {
	print "Correcting /var/log/apache-httpd to /var/log/apache in httpd.conf.\n";
	$httpdconf =~ s/\/var\/log\/apache-httpd/\/var\/log\/apache/mg;
	$write_httpdconf++;
    }
    if ($httpdconf =~ m/.*mod_browser/m)
    {
	print "Removing obsolete module mod_browser from httpd.conf.\n";
	$httpdconf =~ s/^.*mod_browser.*\n//mg;
	$write_httpdconf++;
    }
    if ($allconf =~ m/^\s*ScoreBoardFile/m)
    {
	print "Removing obsolecent directive ScoreBoardFile from httpd.conf.";
	print " (Apache 1.3 uses shared memory)"
	    if ($main::version eq "1.3");
	$httpdconf =~ s/.*ScoreBoardFile.*\n//mg;
	$write_httpdconf++;
	print ".\n";
    }
    if (! ($httpdconf =~ m/^\s*PidFile\s+$PID_FILE/m))
    {
	print "Correcting PidFile to $PID_FILE in httpd.conf.\n";
	$httpdconf =~ s/^\s*PidFile.*/PidFile $PID_FILE/m;
	$write_httpdconf++;
    }
    if ($httpdconf =~ m/Please keep this ClearModuleList: line/m)
    {
	print "Correcting magic ClearModuleList line to LoadModule.\n";
	$httpdconf =~ s/Please keep this ClearModuleList: line/Please keep this LoadModule: line/m;
	$write_httpdconf++;
    }
   if ($httpdconf =~ m/^\s*ServerAdmin\s*you.*address/mi)
   {
       $write_httpdconf++;
       $fix_webmaster++;
    }

    $write_httpdconf++ if ($httpdconf =~ m/mod_browser/mi);
}


sub make_directory ($)
{
    if (! -d $_[0])
    {
	system ("mkdir --parents --mode=755 $_[0]")
	    || print "Created directory $_[0].\n";

    }
    print "Fixing: ";
    system ("chown --verbose root.$main::servergroup $_[0]");
}


sub config_documentroot ()
{
    if (! defined ($opt_documentroot))
    {
	print "\nThe Apache server will serve documents from a directory called ";
	print "the\ndocument root or server root.  You must specify such a ";
	print "directory for\nthe server to work: /var/www is recommended.\n\n";
	do {
	    $documentroot = answer ($documentroot,
				    "What should the DocumentRoot be?");
	    $srmconf =~ s/^\s*DocumentRoot.*/DocumentRoot $documentroot/m;
	    $write_srmconf++ if $changed;
	    make_directory ($documentroot) if (! -x $documentroot);
	} until (-d $documentroot);
    }
    else
    {
	$documentroot = $opt_documentroot;
	$main::srmconf =~ s/^\s*DocumentRoot.*/DocumentRoot $documentroot/m;
	print "The DocumentRoot is set to $documentroot.\n";
	make_directory ($documentroot) if (! -x $documentroot);
	$write_srmconf++;
    }
    chomp ($indexfile = `ls $documentroot/index.* 2> /dev/null | head -1`);
    if ($indexfile eq "")
    {
	print "Installing your new homepage in $documentroot.\n";
	system ("cp -p -i $HOME_EX $documentroot/index.html && chmod 644 $documentroot/index.html");
    }
    else
    {
	print "Leaving existing site $indexfile untouched.\n";
    }
}


sub config_serveradmin ()
{
    if (! defined ($opt_serveradmin))
    {
	print "\nEnter the email address of your server administrator.  This ";
	print "address \nwill be used in error messages allowing users to submit ";
	print "reports of\nfaulty links or misconfigured cgi-programs to you. ";
	print "It should be an email\naddress that corresponds to a human.\n\n";

	$main::serveradmin = "$main::serveradmin\@$mailname"
	    if (! $main::serveradmin =~ m/@/);
	$main::serveradmin = answer ($main::serveradmin,
				     "Who should the ServerAdmin be?");
    }
    else
    {
	$main::serveradmin = $opt_serveradmin;
	print "The ServerAdmin is set to $main::serveradmin.\n";
	$changed++;
    }
    $httpdconf =~ s/^\s*ServerAdmin.*/ServerAdmin $main::serveradmin/m;
    $write_httpdconf++ if $changed;

#    if ($aliasesconf =~ m/^\s*webmaster/im)
#    {
#	if (! ($aliasesconf =~ m/^\s*webmaster.*$main::serveradmin/im))
#	{
#	    if (yorn (1, "Correct the webmaster mail alias to this address?"))
#	    {
#		$aliasesconf =~
#		    s/^\s*webmaster.*/webmaster: $main::serveradmin/m;
#		$write_aliasesconf++;
#	    }
#	}
#    }
#    else
#    {
#	if (yorn (1, "Create a webmaster mail alias for this address?"))
#	{
#	    $write_aliasesconf++;
#	    $aliasesconf =~ s/$/\n\n\# Maintainer of the Web server\n/s;
#	    $aliasesconf =~ s/$/webmaster: $main::serveradmin\n/s;
#	}
#    }

}


sub config_servername ()
{
    return unless $main::nonvirtconf =~ /^\s*ServerName /m;
    if (! defined ($opt_servername))
    {
	print "\nYou may want to choose the publicized name for your server.  ";
	print "This name\nis used to make the server report itself as being ";
	print "someone else, for\nexample to replace $mailname by www.$mailname ";
	print "which looks nicer.\nPlease note that you may still need to make ";
	print "sure this alternative name\nwill be recognized by the Domain Name ";
	print "Service if you want your\nserver to be reached!\n\n";

	$servername = answer ($servername, "What should the ServerName be?");
    }
    else
    {
	$servername = $opt_servername;
	print "The ServerName is set to $servername.\n";
	$changed++;
    }
    $httpdconf =~ s/^\s*ServerName.*/ServerName $servername/m;
    $write_httpdconf++ if $changed;
}


sub config_serverport ()
{
    if (! defined ($opt_port))
    {
	print "\nPlease choose a port number on which the Apache server will ";
	print "listen\nfor incoming connections.  This port number is usually ";
	print "80, but you\nmay want to choose another one if you have another ";
	print "server already\nlistening on that port, or if you want to listen ";
	print "on an unprivileged\nport; in this case, the port 8080 might be a ";
	print "good choice.\n\n";

	$serverport = answer ($serverport, "What port should Apache listen on?");
    }
    else
    {
	$serverport = $opt_port;
	print "The Port is set to $serverport.\n";
	$changed++;
    }
    $httpdconf =~ s/^\s*Port.*/Port $serverport/m;
    $write_httpdconf++ if $changed;
}


sub find_suitable_modules (;$)
{
    $v = (defined ($_[0])) ? $_[0] : $main::version;
    my $d = ($v eq "1.3") ? "/usr/lib/apache/1.3" : "/usr/lib/apache/modules";
    my $k= ($v eq "1.3") ? "LoadModule.*apache/1.3|AddModule" : "LoadModule.*apache/module";
    my $m = `egrep -l "$k" $d/*.info 2> /dev/null`;
    return split ("\n", $m);
}


sub module_required ($;$)
{
    my $l;
    my $directives = 0;
    my $handles = 0;
    my $types = 0;
    my $needed = 0;
    my $verbose = (defined ($_[1])) ? $_[1] : 0;
    (-f $_[0]) || return 0;
    my @file = split ("\n", `cat $_[0]`);
    print "$_[0]\n" if $verbose;
    foreach $l (@file)
    {
	chomp ($l);
	($directives = 1, next) if ($l =~ m/^Directives:/);
	($directives = 0, next) if ($l =~ m/^\w/);
	if ($directives && $l =~ m/^ \w/)
	{
	    $l =~ s/^ //;
	    $l =~ s/ .*//;
	    print "  directive: \"$l\"" if $verbose;
	    if ($main::allconf =~ m/^\s*$l\W/m)
	    {
		$needed++ ;
		print "  *" if $verbose;
	    }
	    print "\n" if $verbose;
	}
    }
    foreach $l (@file)
    {
	chomp ($l);
	($handles = 1, next) if ($l =~ m/^Handles:/);
	($handles = 0, next) if ($l =~ m/^\w/);
	if ($handles && $l =~ m/^ \w/)
	{
	    $l =~ s/^ //;
	    $l =~ s/ .*//;
	    print "  handler: \"$l\"" if $verbose;
	    if ($main::allconf =~ m/^\s*\w*Handler\s*$l/m)
	    {
		$needed++;
		print "  *" if $verbose;
	    }
	    print "\n" if $verbose;
	}
    }
    foreach $l (@file)
    {
	chomp ($l);
	($types = 1, next) if ($l =~ m/^MimeTypes:/);
	($types = 0, next) if ($l =~ m/^\w/);
	if ($types && $l =~ m/^ \w/)
	{
	    $l =~ s/^ //;
	    $l =~ s/ .*//;
	    print "  type: \"$l\"" if $verbose;
	    if ($main::allconf =~ m/^\s\w*Type\s*$l\W/m)
	    {
		$needed++;
		print "  *" if $verbose;
	    }
	    print "\n" if $verbose;
	}
    }
    return $needed;
}




sub get_description ($)
{
    chomp (my $desc = `egrep "^Description: " $_[0]`);
    $desc =~ s/Description: //;
    return $desc;
}


sub get_module_line ($)
{
    my $k= ($main::version eq "1.3") ? 
	"LoadModule.*apache/1.3|AddModule" : "LoadModule.*apache/module";
    chomp (my $l = `egrep "^$k" $_[0]`);
    $l =~ s/LoadModule: /LoadModule /;
    $l =~ s/AddModule: /AddModule /;
    return $l;
}



sub update_modules ($)
{
    $_[0] =~ s/^\n//m;
    if ($main::httpdconf =~ m/The way lines are.*Debian.*such hashes\./s)
    {
	$main::httpdconf =~
	    s/\# The way lines.*will use such hashes\.\n\#\n//s;
    }
    print "Pondering.";
    foreach $m (find_suitable_modules ("1.1"))
    {
	chomp (my $l = `egrep "^LoadModule:.*\/1.3\/" $m | cut -f 2 -d " "`);
	$main::httpdconf =~ s/.*LoadModule .*$l.*\n//mg;
	print ".";
    }
    foreach $m (find_suitable_modules ("1.3"))
    {
	chomp ($l = `egrep "^AddModule: " $m`);
	$l =~ s/AddModule: //;
	$main::httpdconf =~ s/.*AddModule $l.*\n//mg;
	print ".";
    }
    print "done.\n";
    my $l = "LoadModule";
    $main::httpdconf =~ s/^\s*ClearModuleList.*\n//m;
    $main::httpdconf =~ s/^\s*AddModule.*\n//mg; # NEW
    $main::httpdconf =~ s/^\s*LoadModule.*\n//mg; # NEW
    $main::httpdconf =~ s/^\# LoadModule.*\n//mg; # NEW
    $main::httpdconf =~
	s/Please keep.*$l.*installation.\n/Please keep this $l: line here, it is needed for installation\.\n$_[0]/s;
    $main::write_httpdconf++;
}



sub module_standard ($)
{
    return 1 if $_[0] =~ m/mod_auth\./;
    return 1 if $_[0] =~ m/mod_expires\./;
    return 1 if (($_[0] =~ m/mod_rewrite\./) && ($arch ne "sparc"));
    return 1 if $_[0] =~ m/mod_dlopen\./;
    return 1 if $_[0] =~ m/mod_so\./;
    return 1 if $_[0] =~ m/mod_unique_id\./;
    return 0;
}



sub config_modules ()
{
    my $moddl = 0;
#   my $mlist = ($main::version eq "1.3") ? "ClearModuleList\n\n" : "\n";
    $mlist = "\n";

    if (! $opt_force_modules)
    {
	print "\nThis release of the Apache server can be configured to load ";
	print "only certain\nmodules into memory.  This program can automagically ";
	print "configure Apache\nso only modules that are actually needed are ";
	print "loaded.\n\n";
    }
    else
    {
	print "\n";
    }
    $q = yorn (0, "Do you want to manually choose which modules to load?");
    ($q) ? print "\n" : print "Working magic.";
    foreach $m (find_suitable_modules ())
    {
	print "." unless $q;
	my $x = module_required ($m, 0);
	my $std = module_standard ($m);
	my $l = get_module_line ($m);
	next if ($moddl && $l =~ /mod_dl/);
	if ($q)
	{
	    my $t = get_description ($m);
	    my $r = ($x) ? " [required]" : "";
	    $r = ($std) ? " [standard]" : $r;
	    (yorn (($x + $std), "$t$r?"))
		? $mlist =~ s/$/$l\n/ : $mlist =~ s/$/\# $l\n/;
	}
	else
	{
	    ($x || $std)
		? $mlist =~ s/$/$l\n/ : $mlist =~ s/$/\# $l\n/;
	}
	$moddl = 1 if ($l =~ /mod_dl/);
    }
    print "done." unless $q;
    print "\n\n$mlist\n";
    update_modules ($mlist);
}


sub offer_early_exit ()
{
    return if ($opt_force || $opt_force_modules);
    if (! $write_httpdconf && ! $write_accessconf && ! $write_srmconf)
    {
	if (yorn (1, "A valid Apache configuration exists.  Use it?"))
	{
	    if (yorn (1, "Restart Apache now?"))
	    {
		if (-x "/usr/sbin/apachectl")
		{
		    system ("/usr/sbin/apachectl stop");
		    sleep 10;
		    system ("/usr/sbin/apachectl start");
		}
		else
		{
		    system ("/etc/init.d/apache reload-modules");
		}
	    }
	    exit 0;
	}
	$opt_update = 0;
    }
    print "An Apache configuration exists, but needs some tweaking.\n"
	if ($write_httpdconf);
}



###########################################################################


GetOptions ("force!",
	    "assert-perl!",
	    "force-modules!",
	    "update!",
	    "serveradmin=s",
	    "servername=s",
	    "documentroot=s",
	    "port=i");

exit 0 if $opt_assert_perl;

ensure_files ();
load_config_files ();
make_corrections ();
offer_early_exit () if ($opt_update);

if (! $opt_force_modules)
{
    print "\nYour config files will not be modified until you select Y at \"save changes.\"\n";

    config_serveradmin () unless ($opt_update && !$fix_webmaster);
    config_documentroot ()
	unless ($write_httpdconf + $write_accessconf + $write_srmconf == 0);
    config_servername () unless ($opt_update);
    config_serverport () unless ($opt_update);
}
config_modules ();

if (! yorn (1, "\nSave these changes to the configuration files?"))
{
    print "\nWhew!  No changes were made.\n\n";
    exit 0;
}
print "\n";

if ($write_httpdconf)
{
    system ("savelog -c 100 $HTTPD_CONF")
	&& die ("couldn't rotate $HTTPD_CONF");
    open (CONF, ">$HTTPD_CONF") || die ("couldn't open $HTTPD_CONF");
    print CONF $httpdconf;
    close (CONF);
}
if ($write_accessconf)
{
    system ("savelog -c 100 $ACCESS_CONF")
	&& die ("couldn't rotate $ACCESS_CONF");
    open (CONF, ">$ACCESS_CONF") || die ("couldn't open $ACCESS_CONF");
    print CONF $accessconf;
    close (CONF);
}
if ($write_srmconf)
{
    system ("savelog -c 100 $SRM_CONF")
	&& die ("couldn't rotate $SRM_CONF");
    open (CONF, ">$SRM_CONF") || die ("couldn't open $SRM_CONF");
    print CONF $srmconf;
    close (CONF);
}
if ($write_aliasesconf)
{
    print "Writing $main::serveradmin to $ALIASES_CONF ...\n";
    system ("savelog -c 100 $ALIASES_CONF")
	&& die ("couldn't rotate $ALIASES_CONF");
    open (CONF, ">$ALIASES_CONF") || die ("couldn't open $ALIASES_CONF");
    print CONF $aliasesconf;
    close (CONF);
    if (-x "/usr/bin/newaliases" || -x "/usr/sbin/newaliases")
    {
	system ("newaliases");
    }
    elsif (-x "/usr/bin/mkaliases" || -x "/usr/sbin/mkaliases")
    {
	system ("mkaliases");
    }
    else
    {
	print "Could not guess how to update aliases -- rebuild manually!\n";
    }
}

if (yorn (1, "Restart Apache now?"))
{
    if (-x "/usr/sbin/apachectl")
    {
	exec ("/usr/sbin/apachectl graceful");
    }
    else
    {
	exec ("/etc/init.d/apache reload-modules");
    }
}

exit 0;