libsetup.pm 38.3 KB
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#!/usr/bin/perl -wT

#
# Common routines and constants for the client bootime setup stuff.
#
package libsetup;
use Exporter;
@ISA = "Exporter";
@EXPORT =
    qw ( libsetup_init inform_reboot cleanup_node check_status
	 create_nicknames doifconfig dohostnames
	 doaccounts dorpms dotarballs dostartupcmd install_deltas
	 bootsetup nodeupdate startcmdstatus whatsmynickname
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	 TBBackGround TBForkCmd remotenodeupdate remotenodevnodesetup
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	 OPENTMCC CLOSETMCC RUNTMCC MFS
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	 TMCC TMIFC TMDELAY TMRPM TMTARBALLS TMHOSTS
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	 TMNICKNAME HOSTSFILE TMSTARTUPCMD FINDIF TMTUNNELCONFIG
	 TMTRAFFICCONFIG TMROUTECONFIG TMVNODEDIR
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	 TMCCCMD_REBOOT TMCCCMD_STATUS TMCCCMD_IFC TMCCCMD_ACCT TMCCCMD_DELAY
	 TMCCCMD_HOSTS TMCCCMD_RPM TMCCCMD_TARBALL TMCCCMD_STARTUP
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	 TMCCCMD_DELTA TMCCCMD_STARTSTAT TMCCCMD_READY TMCCCMD_TRAFFIC
	 TMCCCMD_BOSSINFO
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       );

# Must come after package declaration!
use English;

#
# This is the home of the setup library on the client machine. The including
# program has to tell us this by calling the init routine below. For example,
# it is /etc/testbed on FreeBSD and /etc/rc.d/testbed on Linux.
#
my $SETUPDIR;

sub libsetup_init($)
{
    my($path) = @_;

    $SETUPDIR = $path;
}

#
# This "local" library provides the OS dependent part. Must load this after
# defining the above function cause the local library invokes it to set the
# $SETUPDIR
#
use liblocsetup;

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#
# For virtual (multiplexed nodes). If defined, tack onto tmcc command.
# and use in pathnames. Not sure how this will be used later with jailed
# virtual nodes, since they will run in their own environment, but without
# jail we have to share the same namespace.
#
my $vnodeid	= "";

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#
# These are the paths of various files and scripts that are part of the
# setup library.
#
sub TMCC()		{ "$SETUPDIR/tmcc"; }
sub TMIFC()		{ "$SETUPDIR/rc.ifc"; }
sub TMRPM()		{ "$SETUPDIR/rc.rpm"; }
sub TMTARBALLS()	{ "$SETUPDIR/rc.tarballs"; }
sub TMSTARTUPCMD()	{ "$SETUPDIR/startupcmd"; }
sub TMHOSTS()		{ "$SETUPDIR/hosts"; }
sub TMNICKNAME()	{ "$SETUPDIR/nickname"; }
sub FINDIF()		{ "$SETUPDIR/findif"; }
sub HOSTSFILE()		{ "/etc/hosts"; }
sub TMMOUNTDB()		{ "$SETUPDIR/mountdb"; }
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sub TMROUTECONFIG()     { "$SETUPDIR/$vnodeid/rc.route"; }
sub TMTRAFFICCONFIG()	{ "$SETUPDIR/$vnodeid/rc.traffic"; }
sub TMTUNNELCONFIG()	{ "$SETUPDIR/$vnodeid/rc.tunnel"; }
sub TMVTUNDCONFIG()	{ "$SETUPDIR/$vnodeid/vtund.conf"; }
sub TMPASSDB()		{ "$SETUPDIR/passdb"; }
sub TMGROUPDB()		{ "$SETUPDIR/groupdb"; }
sub TMVNODEDIR()	{ "$SETUPDIR/$vnodeid"; }
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#
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# This is the VERSION. We send it through to tmcd so it knows what version
# responses this file is expecting.
#
# BE SURE TO BUMP THIS AS INCOMPATIBILE CHANGES TO TMCD ARE MADE!
#
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sub TMCD_VERSION()	{ 4; };
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#
# These are the TMCC commands. 
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#
sub TMCCCMD_REBOOT()	{ "reboot"; }
sub TMCCCMD_STATUS()	{ "status"; }
sub TMCCCMD_IFC()	{ "ifconfig"; }
sub TMCCCMD_ACCT()	{ "accounts"; }
sub TMCCCMD_DELAY()	{ "delay"; }
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sub TMCCCMD_HOSTS()	{ "hostnames"; }
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sub TMCCCMD_RPM()	{ "rpms"; }
sub TMCCCMD_TARBALL()	{ "tarballs"; }
sub TMCCCMD_STARTUP()	{ "startupcmd"; }
sub TMCCCMD_DELTA()	{ "deltas"; }
sub TMCCCMD_STARTSTAT()	{ "startstatus"; }
sub TMCCCMD_READY()	{ "ready"; }
sub TMCCCMD_MOUNTS()	{ "mounts"; }
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sub TMCCCMD_ROUTING()	{ "routing"; }
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sub TMCCCMD_TRAFFIC()	{ "trafgens"; }
sub TMCCCMD_BOSSINFO()	{ "bossinfo"; }
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sub TMCCCMD_TUNNEL()	{ "tunnels"; }
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sub TMCCCMD_NSECONFIGS(){ "nseconfigs"; }
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#
# Some things never change.
# 
my $TARINSTALL  = "/usr/local/bin/install-tarfile %s %s";
my $DELTAINSTALL= "/usr/local/bin/install-delta %s";
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my $VTUND       = "/usr/local/sbin/vtund";
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#
# This is a debugging thing for my home network.
# 
#my $NODE	= "REDIRECT=155.101.132.101";
$NODE		= "";

# Locals
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my $pid		= "";
my $eid		= "";
my $vname	= "";

# When on the MFS, we do a much smaller set of stuff.
# Cause of the way the packages are loaded (which I do not understand),
# this is computed on the fly instead of once.
sub MFS()	{ if (-e "$SETUPDIR/ismfs") { return 1; } else { return 0; } }
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#
# Same for a remote node.
#
sub REMOTE()	{ if (-e "$SETUPDIR/isrem") { return 1; } else { return 0; } }

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#
# Open a TMCC connection and return the "stream pointer". Caller is
# responsible for closing the stream and checking return value.
#
# usage: OPENTMCC(char *command, char *args)
#
sub OPENTMCC($;$)
{
    my($cmd, $args) = @_;
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    my $vn = "";
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    local *TM;

    if (!defined($args)) {
	$args = "";
    }
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    if ($vnodeid ne "") {
	$vn = "-n $vnodeid";
    }
    
    my $foo = sprintf("%s -v %d %s $vn %s %s |",
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		      TMCC, TMCD_VERSION, $NODE, $cmd, $args);
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    open(TM, $foo)
	or die "Cannot start $TMCC: $!";

    return (*TM);
}

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#
# Close connection. Die on error.
# 
sub CLOSETMCC($) {
    my($TM) = @_;
    
    close($TM)
	or die $? ? "$TMCC exited with status $?.\n" :
	            "Error closing pipe: $!\n";
}

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#
# Run a TMCC command with the provided arguments.
#
# usage: RUNTMCC(char *command, char *args)
#
sub RUNTMCC($;$)
{
    my($cmd, $args) = @_;
    my($TM);

    if (!defined($args)) {
	$args = "";
    }
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    $TM = OPENTMCC($cmd, $args);

    close($TM)
	or die $? ? "TMCC exited with status $?" : "Error closing pipe: $!";
    
    return 0;
}

#
# Inform the master we have rebooted.
#
sub inform_reboot()
{
    RUNTMCC(TMCCCMD_REBOOT);
    return 0;
}

#
# Reset to a moderately clean state.
#
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sub cleanup_node ($) {
    my ($scrub) = @_;
    
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    print STDOUT "Cleaning node; removing configuration files ...\n";
    unlink TMIFC, TMRPM, TMSTARTUPCMD, TMNICKNAME, TMTARBALLS;
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    unlink TMROUTECONFIG, TMTRAFFICCONFIG, TMTUNNELCONFIG;
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    unlink TMMOUNTDB . ".db";

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    #
    # If scrubbing, remove the password/group file DBs so that we revert
    # to base set.
    # 
    if ($scrub) {
	unlink TMPASSDB . ".db";
	unlink TMGROUPDB . ".db";
    }

    if (! REMOTE()) {
	printf STDOUT "Resetting %s file\n", HOSTSFILE;
	if (system($CP, "-f", TMHOSTS, HOSTSFILE) != 0) {
	    printf "Could not copy default %s into place: $!\n", HOSTSFILE;
	    exit(1);
	}
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    }

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    return os_cleanup_node($scrub);
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}

#
# Check node allocation.
#
# Returns 0 if node is free. Returns list (pid/eid/vname) if allocated.
#
sub check_status ()
{
    my $TM;
    
    $TM = OPENTMCC(TMCCCMD_STATUS);
    $_  = <$TM>;
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    CLOSETMCC($TM);
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    if ($_ =~ /^FREE/) {
	return 0;
    }
    
    if ($_ =~ /ALLOCATED=([-\@\w.]*)\/([-\@\w.]*) NICKNAME=([-\@\w.]*)/) {
	$pid   = $1;
	$eid   = $2;
	$vname = $3;
    }
    else {
	warn "*** WARNING: Error getting reservation status\n";
	return 0;
    }
    return ($pid, $eid, $vname);
}

#
# Stick our nickname in a file in case someone wants it.
#
sub create_nicknames()
{
    open(NICK, ">" . TMNICKNAME)
	or die("Could not open nickname file: $!");
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    print NICK "$vname.$eid.$pid\n";
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    close(NICK);

    return 0;
}

#
# Process mount directives from TMCD. We keep track of all the mounts we
# have added in here so that we delete just the accounts we added, when
# project membership changes. Same goes for project directories on shared
# nodes. We use a simple perl DB for that.
#
sub domounts()
{
    my $TM;
    my %MDB;
    my %mounts;
    my %deletes;
    
    $TM = OPENTMCC(TMCCCMD_MOUNTS);

    while (<$TM>) {
	if ($_ =~ /REMOTE=([-:\@\w\.\/]+) LOCAL=([-\@\w\.\/]+)/) {
	    $mounts{$1} = $2;
	}
    }
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    CLOSETMCC($TM);
    
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    #
    # The MFS version does not support (or need) this DB stuff. Just mount
    # them up.
    #
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    if (MFS()) {
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	while (($remote, $local) = each %mounts) {
	    if (! -e $local) {
		if (! os_mkdir($local, 0770)) {
		    warn "*** WARNING: Could not make directory $local: $!\n";
		    next;
		}
	    }
	
	    print STDOUT "  Mounting $remote on $local\n";
	    if (system("$MOUNT $remote $local")) {
		warn "*** WARNING: Could not $MOUNT $remote on $local: $!\n";
		next;
	    }
	}
	return 0;
    }

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    dbmopen(%MDB, TMMOUNTDB, 0660);
    
    #
    # First mount all the mounts we are told to. For each one that is not
    # currently mounted, and can be mounted, add it to the DB.
    # 
    while (($remote, $local) = each %mounts) {
	if (system("$MOUNT | $EGREP ' $local '") == 0) {
	    $MDB{$remote} = $local;
	    next;
	}

	if (! -e $local) {
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	    if (! os_mkdir($local, 0770)) {
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		warn "*** WARNING: Could not make directory $local: $!\n";
		next;
	    }
	}
	
	print STDOUT "  Mounting $remote on $local\n";
	if (system("$MOUNT $remote $local")) {
	    warn "*** WARNING: Could not $MOUNT $remote on $local: $!\n";
	    next;
	}

	$MDB{$remote} = $local;
    }

    #
    # Now unmount the ones that we mounted previously, but are now no longer
    # in the mount set (as told to us by the TMCD). Note, we cannot delete 
    # them directly from MDB since that would mess up the foreach loop, so
    # just stick them in temp and postpass it.
    #
    while (($remote, $local) = each %MDB) {
	if (defined($mounts{$remote})) {
	    next;
	}

	if (system("$MOUNT | $EGREP ' $local '")) {
	    $deletes{$remote} = $local;
	    next;
	}

	print STDOUT "  Unmounting $local\n";
	if (system("$UMOUNT $local")) {
	    warn "*** WARNING: Could not unmount $local\n";
	    next;
	}
	
	#
	# Only delete from set if we can actually unmount it. This way
	# we can retry it later (or next time).
	# 
	$deletes{$remote} = $local;
    }
    while (($remote, $local) = each %deletes) {
	delete($MDB{$remote});
    }

    # Write the DB back out!
    dbmclose(%MDB);

    return 0;
}

#
# Do interface configuration.    
# Write a file of ifconfig lines, which will get executed.
#
sub doifconfig ()
{
    my $TM;
    
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    #
    # Kinda ugly, but there is too much perl goo included by Socket to put it
    # on the MFS. 
    # 
    if (MFS()) {
	return 1;
    }
    require Socket;
    import Socket;
    
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    $TM = OPENTMCC(TMCCCMD_IFC);

    #
    # Open a connection to the TMCD, and then open a local file into which
    # we write ifconfig commands (as a shell script).
    # 
    open(IFC, ">" . TMIFC)
	or die("Could not open " . TMIFC . ": $!");
    print IFC "#!/bin/sh\n";
    
    while (<$TM>) {
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	my $pat;

	#
	# Note that speed has a units spec: (K|M)bps
	# 
	$pat  = q(INTERFACE=(\d*) INET=([0-9.]*) MASK=([0-9.]*) MAC=(\w*) );
	$pat .= q(SPEED=(\w*) DUPLEX=(\w*));
	
	if ($_ =~ /$pat/) {
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	    my $iface;

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	    my $inet     = $2;
	    my $mask     = $3;
	    my $mac      = $4;
	    my $speed    = $5; 
	    my $duplex   = $6;
	    my $routearg = inet_ntoa(inet_aton($inet) & inet_aton($mask));
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	    if ($iface = findiface($mac)) {
		my $ifline =
		    os_ifconfig_line($iface, $inet, $mask, $speed, $duplex);
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		print STDOUT "  $ifline\n";
		print IFC "$ifline\n";
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		print IFC TMROUTECONFIG . " $routearg up\n";
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	    }
	    else {
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		warn "*** WARNING: Bad MAC: $mac\n";
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	    }
	}
	else {
	    warn "*** WARNING: Bad ifconfig line: $_";
	}
    }
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    CLOSETMCC($TM);
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    close(IFC);
    chmod(0755, TMIFC);

    return 0;
}

#
# Convert from MAC to iface name (eth0/fxp0/etc) using little helper program.
# 
sub findiface($)
{
    my($mac) = @_;
    my($iface);

    open(FIF, FINDIF . " $mac |")
	or die "Cannot start " . FINDIF . ": $!";

    $iface = <FIF>;
    
    if (! close(FIF)) {
	return 0;
    }
    
    $iface =~ s/\n//g;
    return $iface;
}

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#
# Do router configuration stuff. This just writes a file for someone else
# to deal with.
#
sub dorouterconfig ()
{
    my @stuff   = ();
    my $routing = 0;
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    my %upmap   = ();
    my %downmap = ();
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    my $TM;

    $TM = OPENTMCC(TMCCCMD_ROUTING);
    while (<$TM>) {
	push(@stuff, $_);
    }
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    CLOSETMCC($TM);
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    if (! @stuff) {
	return 0;
    }

    #
    # Look for router type. If none, then do not bother to write this file.
    # 
    foreach my $line (@stuff) {
	if (($line =~ /ROUTERTYPE=(.+)/) && ($1 ne "none")) {
	    $routing = 1;
	    last;
	}
    }
    if (! $routing) {
	return 0;
    }
    
    open(RC, ">" . TMROUTECONFIG)
	or die("Could not open " . TMROUTECONFIG . ": $!");

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    print RC "#!/bin/sh\n";
    print RC "# auto-generated by libsetup.pm, DO NOT EDIT\n";

    #
    # Now convert static route info into OS route commands
    # Also check for use of gated and remember it.
    #
    my $usegated = 0;
    my $pat;

    #
    # ROUTERTYPE=manual
    # ROUTE DEST=192.168.2.3 DESTTYPE=host DESTMASK=255.255.255.0 \
    #	NEXTHOP=192.168.1.3 COST=0
    #
    $pat = q(ROUTE DEST=([0-9\.]*) DESTTYPE=(\w*) DESTMASK=([0-9\.]*) );
    $pat .= q(NEXTHOP=([0-9\.]*) COST=([0-9]*));

    my $usemanual = 0;
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    foreach my $line (@stuff) {
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	if ($line =~ /ROUTERTYPE=(gated|ospf)/) {
	    $usegated = 1;
	} elsif ($line =~ /ROUTERTYPE=(manual|static)/) {
	    $usemanual = 1;
	} elsif ($usemanual && $line =~ /$pat/) {
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	    my $dip   = $1;
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	    my $rtype = $2;
	    my $dmask = $3;
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	    my $gate  = $4;
	    my $cost  = $5;
	    my $routearg = inet_ntoa(inet_aton($gate) & inet_aton($dmask));
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	    if (! defined($upmap{$routearg})) {
		$upmap{$routearg} = [];
		$downmap{$routearg} = [];
	    }
	    $rcline = os_routing_add_manual($rtype, $dip, $dmask, $gate,$cost);
	    push(@{$upmap{$routearg}}, $rcline);
	    $rcline = os_routing_del_manual($rtype, $dip, $dmask, $gate,$cost);
	    push(@{$downmap{$routearg}}, $rcline);
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	} else {
	    warn "*** WARNING: Bad routing line: $line\n";
	}
    }

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    print RC "case \"\$1\" in\n";
    foreach my $arg (keys(%upmap)) {
	print RC "  $arg)\n";
	print RC "    case \"\$2\" in\n";
	print RC "      up)\n";
	foreach my $rcline (@{$upmap{$arg}}) {
	    print RC "        $rcline\n";
	}
	print RC "      ;;\n";
	print RC "      down)\n";
	foreach my $rcline (@{$downmap{$arg}}) {
	    print RC "        $rcline\n";
	}
	print RC "      ;;\n";
	print RC "    esac\n";
	print RC "  ;;\n";
    }
    print RC "  enable)\n";

    #
    # Turn on IP forwarding
    #
    my $rcline = os_routing_enable_forward();
    print RC "    $rcline\n";

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    #
    # Finally, enable gated if desired.
    #
    # Note that we allow both manually-specified static routes and gated
    # though more work may be needed on the gated config files to make
    # this work (i.e., to import existing kernel routes).
    #
    if ($usegated) {
	$rcline = os_routing_enable_gated();
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	print RC "    $rcline\n";
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    }
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    print RC "  ;;\n";
    print RC "esac\n";
    print RC "exit 0\n";
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    close(RC);
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    chmod(0755, TMROUTECONFIG);
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    return 0;
}

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#
# Host names configuration (/etc/hosts). 
#
sub dohostnames ()
{
    my $TM;

    #
    # Start with fresh copy, since the hosts files is potentially updated
    # after the node boots via the update command.
    # 
    if (system($CP, "-f", TMHOSTS, HOSTSFILE) != 0) {
	printf STDERR "Could not copy default %s into place: $!\n", HOSTSFILE;
	return 1;
    }
    
    $TM = OPENTMCC(TMCCCMD_HOSTS);

    open(HOSTS, ">>" . HOSTSFILE)
	or die("Could not open $HOSTSFILE: $!");

    #
    # Now convert each hostname into hosts file representation and write
637
638
639
640
641
    # it to the hosts file. Note that ALIASES is for backwards compat.
    # Should go away at some point.
    #
    my $pat  = q(NAME=([-\w\.]+) IP=([0-9\.]*) ALIASES=\'([-\w\. ]*)\');
    
642
    while (<$TM>) {
643
644
645
646
647
648
	if ($_ =~ /$pat/) {
	    my $name    = $1;
	    my $ip      = $2;
	    my $aliases = $3;
	    
	    my $hostline = os_etchosts_line($name, $ip, $aliases);
649
650
651
652
653
654
655
656
	    
	    print STDOUT "  $hostline\n";
	    print HOSTS  "$hostline\n";
	}
	else {
	    warn "*** WARNING: Bad hosts line: $_";
	}
    }
657
    CLOSETMCC($TM);
658
659
660
661
662
663
664
665
    close(HOSTS);

    return 0;
}

sub doaccounts ()
{
    my %newaccounts = ();
666
667
668
669
    my %newgroups   = ();
    my %deletes     = ();
    my %PWDDB;
    my %GRPDB;
670
671
672
673

    my $TM = OPENTMCC(TMCCCMD_ACCT);

    #
674
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678
679
    # The strategy is to keep a record of all the groups and accounts
    # added by the testbed system so that we know what to remove. We
    # use a vanilla perl dbm for that, one for the groups and one for
    # accounts. 
    #
    # First just get the current set of groups/accounts from tmcd.
680
681
682
    #
    while (<$TM>) {
	if ($_ =~ /^ADDGROUP NAME=([-\@\w.]+) GID=([0-9]+)/) {
683
684
685
	    #
	    # Group info goes in the hash table.
	    #
686
687
	    my $gname = "$1";
	    
688
	    if (REMOTE()) {
689
		$gname = "emu-${gname}";
690
	    }
691
	    $newgroups{"$gname"} = $2
692
693
694
695
696
697
698
699
700
	}
	elsif ($_ =~ /^ADDUSER LOGIN=([0-9a-z]+)/) {
	    #
	    # Account info goes in the hash table.
	    # 
	    $newaccounts{$1} = $_;
	    next;
	}
	else {
701
	    warn "*** WARNING: Bad accounts line: $_\n";
702
703
	}
    }
704
    CLOSETMCC($TM);
705

706
707
708
709
710
711
    dbmopen(%PWDDB, TMPASSDB, 0660) or
	die("Cannot open " . TMPASSDB . ": $!\n");
	
    dbmopen(%GRPDB, TMGROUPDB, 0660) or
	die("Cannot open " . TMGROUPDB . ": $!\n");

712
    #
713
714
    # Create any groups that do not currently exist. Add each to the
    # DB as we create it.
715
    #
716
717
718
719
720
721
    while (($group, $gid) = each %newgroups) {
	my ($exists,undef,$curgid) = getgrnam($group);
	
	if ($exists) {
	    if ($gid != $curgid) {
		warn "*** WARNING: $group/$gid mismatch with existing group\n";
722
	    }
723
	    next;
724
	}
725
726
727
728
729
730
731
732
733

	print "Adding group: $group/$gid\n";
	    
	if (os_groupadd($group, $gid)) {
	    warn "*** WARNING: Error adding new group $group/$gid\n";
	    next;
	}
	# Add to DB only if successful. 
	$GRPDB{$group} = $gid;
734
735
736
    }

    #
737
738
739
740
    # Now remove the ones that we created previously, but are now no longer
    # in the group set (as told to us by the TMCD). Note, we cannot delete 
    # them directly from the hash since that would mess up the foreach loop,
    # so just stick them in temp and postpass it.
741
    #
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
    while (($group, $gid) = each %GRPDB) {
	if (defined($newgroups{$group})) {
	    next;
	}

	print "Removing group: $group/$gid\n";
	
	if (os_groupdel($group)) {
	    warn "*** WARNING: Error removing group $group/$gid\n";
	    next;
	}
	# Delete from DB only if successful. 
	$deletes{$group} = $gid;
    }
    while (($group, $gid) = each %deletes) {
	delete($GRPDB{$group});
758
    }
759
760
761
762
    %deletes = ();

    # Write the DB back out!
    dbmclose(%GRPDB);
763
764

    #
765
766
767
768
769
770
771
    # Repeat the same sequence for accounts, except we remove old accounts
    # first. 
    # 
    while (($login, $uid) = each %PWDDB) {
	if (defined($newaccounts{$login})) {
	    next;
	}
772

773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
806
807
808
809
810
811
812
	my ($exists,undef,$curuid,undef,
	    undef,undef,undef,$homedir) = getpwnam($login);

	#
	# If the account is gone, someone removed it by hand. Remove it
	# from the DB so we do not keep trying.
	#
	if (! defined($exists)) {
	    warn "*** WARNING: Account for $login was already removed!\n";
	    $deletes{$login} = $login;
	    next;
	}

	#
	# Check for mismatch, just in case. If there is a mismatch remove it
	# from the DB so we do not keep trying.
	#
	if ($uid != $curuid) {
	    warn "*** WARNING: ".
		 "Account uid for $login has changed ($uid/$curuid)!\n";
	    $deletes{$login} = $login;
	    next;
	}
	
	print "Removing user: $login\n";
	
	if (os_userdel($login) != 0) {
	    warn "*** WARNING: Error removing user $login\n";
	    next;
	}

	#
	# Remove the home dir. 
	#
	# Must ask for the current home dir in case it came from pw.conf.
	#
	if (defined($homedir) &&
	    index($homedir, "/${login}")) {
	    if (os_homedirdel($login, $homedir) != 0) {
	        warn "*** WARNING: Could not remove homedir $homedir.\n";
813
814
	    }
	}
815
816
817
818
819
820
821
	
	# Delete from DB only if successful. 
	$deletes{$login} = $login;
    }
    
    while (($login, $foo) = each %deletes) {
	delete($PWDDB{$login});
822
823
    }

824
    my $pat = q(ADDUSER LOGIN=([0-9a-z]+) PSWD=([^:]+) UID=(\d+) GID=(.*) );
825
826
827
828
    $pat   .= q(ROOT=(\d) NAME="(.*)" HOMEDIR=(.*) GLIST="(.*)" );
    $pat   .= q(EMULABPUBKEY="(.*)" HOMEPUBKEY="(.*)");

    while (($login, $info) = each %newaccounts) {
829
	if ($info =~ /$pat/) {
830
831
832
833
834
835
836
	    $pswd  = $2;
	    $uid   = $3;
	    $gid   = $4;
	    $root  = $5;
	    $name  = $6;
	    $hdir  = $7;
	    $glist = $8;
837
838
	    $ekey  = $9;
	    $hkey  = $10;
839
840
841
	    if ( $name =~ /^(([^:]+$|^))$/ ) {
		$name = $1;
	    }
842
843
844
	    print "User: $login/$uid/$gid/$root/$name/$hdir/$glist\n";

	    my ($exists,undef,$curuid) = getpwnam($login);
845
846

	    if ($exists) {
847
848
849
850
851
852
853
854
855
856
857
		if (!defined($PWDDB{$login})) {
		    warn "*** WARNING: ".
			 "Skipping since $login existed before EmulabMan!\n";
		    next;
		}
		if ($curuid != $uid) {
		    warn "*** WARNING: ".
			 "$login/$uid uid mismatch with existing login.\n";
		    next;
		}
		print "Updating $login login info.\n";
858
859
860
		os_usermod($login, $gid, "$glist", $root);
		next;
	    }
861
	    print "Adding $login account.\n";
862
863
864
865
866
867

	    if (os_useradd($login, $uid, $gid, $pswd, 
			   "$glist", $hdir, $name, $root)) {
		warn "*** WARNING: Error adding new user $login\n";
		next;
	    }
868
869
870
871
872
873
874
875
876
877
878
879
880
881
882
883
884
885
886
887
888
889
890
891
892
893
894
895
896
897
898
899
900
901
902
903
904
905
906
907
908
909
910
911
	    # Add to DB only if successful. 
	    $PWDDB{$login} = $uid;

	    #
	    # Create .ssh dir and populate it with an authkeys file.
	    # Must ask for the current home dir since we rely on pw.conf.
	    #
	    my (undef,undef,undef,undef,
		undef,undef,undef,$homedir) = getpwuid($uid);
	    my $sshdir = "$homedir/.ssh";
	    
	    if (! -e $sshdir && ($ekey ne "" || $hkey ne "")) {
		if (! mkdir($sshdir, 0700)) {
		    warn("*** WARNING: Could not mkdir $sshdir: $!\n");
		    next;
		}
		if (!chown($uid, $gid, $sshdir)) {
		    warn("*** WARNING: Could not chown $sshdir: $!\n");
		    next;
		}
		if (!open(AUTHKEYS, "> $sshdir/authorized_keys")) {
		    warn("*** WARNING: Could not open $sshdir/keys: $!\n");
		    next;
		}
		if ($ekey ne "") {
		    print AUTHKEYS "$ekey\n";
		}
		if ($hkey ne "") {
		    print AUTHKEYS "$hkey\n";
		}
		close(AUTHKEYS);

		if (!chown($uid, $gid, "$sshdir/authorized_keys")) {
		    warn("*** WARNING: Could not chown $sshdir/keys: $!\n");
		    next;
		}
		if (!chmod(0600, "$sshdir/authorized_keys")) {
		    warn("*** WARNING: Could not chmod $sshdir/keys: $!\n");
		    next;
		}
	    }
	}
	else {
	    warn("*** Bad accounts line: $info\n");
912
913
	}
    }
914
915
916
    # Write the DB back out!
    dbmclose(%PWDDB);

917
918
919
920
921
922
923
924
925
926
927
928
929
930
    return 0;
}

#
# RPM configuration. 
#
sub dorpms ()
{
    my @rpms = ();
    
    my $TM = OPENTMCC(TMCCCMD_RPM);
    while (<$TM>) {
	push(@rpms, $_);
    }
931
    CLOSETMCC($TM);
932
933
934
935
936
937
938
939
940
941

    if (! @rpms) {
	return 0;
    }
    
    open(RPM, ">" . TMRPM)
	or die("Could not open " . TMRPM . ": $!");
    print RPM "#!/bin/sh\n";
    
    foreach my $rpm (@rpms) {
942
	if ($rpm =~ /RPM=(.+)/) {
943
944
945
946
947
948
949
950
951
952
953
954
955
956
957
958
959
960
961
962
963
964
965
966
967
968
969
	    my $rpmline = os_rpminstall_line($1);
		    
	    print STDOUT "  $rpmline\n";
	    print RPM    "echo \"Installing RPM $1\"\n";
	    print RPM    "$rpmline\n";
	}
	else {
	    warn "*** WARNING: Bad RPMs line: $rpm";
	}
    }
    close(RPM);
    chmod(0755, TMRPM);

    return 0;
}

#
# TARBALL configuration. 
#
sub dotarballs ()
{
    my @tarballs = ();

    my $TM = OPENTMCC(TMCCCMD_TARBALL);
    while (<$TM>) {
	push(@tarballs, $_);
    }
970
    CLOSETMCC($TM);
971
972
973
974
975
976
977
978
979
980

    if (! @tarballs) {
	return 0;
    }
    
    open(TARBALL, ">" . TMTARBALLS)
	or die("Could not open " . TMTARBALLS . ": $!");
    print TARBALL "#!/bin/sh\n";
    
    foreach my $tarball (@tarballs) {
981
	if ($tarball =~ /DIR=(.+)\s+TARBALL=(.+)/) {
982
983
984
985
986
987
988
989
990
991
992
993
994
995
996
997
998
999
1000
1001
1002
1003
1004
1005
1006
1007
1008
1009
	    my $tbline = sprintf($TARINSTALL, $1, $2);
		    
	    print STDOUT  "  $tbline\n";
	    print TARBALL "echo \"Installing Tarball $2 in dir $1 \"\n";
	    print TARBALL "$tbline\n";
	}
	else {
	    warn "*** WARNING: Bad Tarballs line: $tarball";
	}
    }
    close(TARBALL);
    chmod(0755, TMTARBALLS);

    return 0;
}

#
# Experiment startup Command.
#
sub dostartupcmd ()
{
    my $startupcmd;
    
    my $TM = OPENTMCC(TMCCCMD_STARTUP);
    $_ = <$TM>;
    if (defined($_)) {
	$startupcmd = $_;
    }
1010
    CLOSETMCC($TM);
1011
1012
1013
1014
1015
1016
1017
1018

    if (! $startupcmd) {
	return 0;
    }
    
    open(RUN, ">" . TMSTARTUPCMD)
	or die("Could not open $TMSTARTUPCMD: $!");
    
1019
    if ($startupcmd =~ /CMD=(\'.+\') UID=([0-9a-z]+)/) {
1020
1021
1022
1023
1024
1025
1026
1027
1028
1029
1030
1031
1032
	print  STDOUT "  Will run $1 as $2\n";
	print  RUN    "$startupcmd";
    }
    else {
	warn "*** WARNING: Bad startupcmd line: $startupcmd";
    }

    close(RUN);
    chmod(0755, TMSTARTUPCMD);

    return 0;
}

1033
1034
1035
1036
1037
1038
sub dotrafficconfig()
{
    my $didopen = 0;
    my $pat;
    my $TM;
    my $boss;
1039
    my $startnse = 0;
1040
    
1041
1042
1043
1044
1045
1046
1047
1048
1049
    #
    # Kinda ugly, but there is too much perl goo included by Socket to put it
    # on the MFS. 
    # 
    if (MFS()) {
	return 1;
    }
    require Socket;
    import Socket;
1050
1051
    
    $TM = OPENTMCC(TMCCCMD_BOSSINFO);
1052
1053
1054
1055
1056
1057
1058
1059
1060
1061
1062
1063
    my $bossinfo = <$TM>;
    ($boss) = split(" ", $bossinfo);

    #
    # XXX hack: workaround for tmcc cmd failure inside TCL
    #     storing the output of a few tmcc commands in
    #     $SETUPDIR files for use by NSE
    #    
    open( BOSSINFCFG, ">$SETUPDIR/tmcc.bossinfo"  ) or die "Cannot open file $SETUPDIR/tmcc.bossinfo: $!";
    print BOSSINFCFG "$bossinfo";
    close(BOSSINFCFG);

1064
    CLOSETMCC($TM);
1065
1066
1067
1068
1069
1070
    my ($pid, $eid, $vname) = check_status();

    my $cmdline = "$SETUPDIR/trafgen -s $boss";
    if ($pid) {
	$cmdline .= " -E $pid/$eid";
    }
1071

1072
1073
1074
1075
1076
1077
1078
1079
1080
1081
1082
1083
1084
1085
1086
1087
    #
    # XXX hack: workaround for tmcc cmd failure inside TCL
    #     storing the output of a few tmcc commands in
    #     $SETUPDIR files for use by NSE
    #
    my $record_sep;

    $record_sep = $/;
    undef($/);
    $TM = OPENTMCC(TMCCCMD_IFC);
    open( IFCFG, ">$SETUPDIR/tmcc.ifconfig"  ) or die "Cannot open file $SETUPDIR/tmcc.ifconfig: $!";
    print IFCFG <$TM>;
    close(IFCFG);
    CLOSETMCC($TM);
    $/ = $record_sep;

1088
1089
    $TM = OPENTMCC(TMCCCMD_TRAFFIC);

1090
1091
    open( TRAFCFG, ">$SETUPDIR/tmcc.trafgens"  ) or die "Cannot open file $SETUPDIR/tmcc.trafgens: $!";    
    
1092
    $pat  = q(TRAFGEN=([-\w.]+) MYNAME=([-\w.]+) MYPORT=(\d+) );
1093
    $pat .= q(PEERNAME=([-\w.]+) PEERPORT=(\d+) );
1094
    $pat .= q(PROTO=(\w+) ROLE=(\w+) GENERATOR=(\w+));
1095
1096

    while (<$TM>) {
1097
1098

	print TRAFCFG "$_";
1099
1100
1101
	if ($_ =~ /$pat/) {
	    #
	    # The following is specific to the modified TG traffic generator:
1102
1103
1104
1105
1106
	    #
	    #  trafgen [-s serverip] [-p serverport] [-l logfile] \
	    #	     [ -N name ] [-P proto] [-R role] [ -E pid/eid ] \
	    #	     [ -S srcip.srcport ] [ -T targetip.targetport ]
	    #
1107
1108
	    # N.B. serverport is not needed right now
	    #
1109
1110
1111
1112
1113
1114
1115
1116
	    my $name = $1;
	    my $ownaddr = inet_ntoa(my $ipaddr = gethostbyname($2));
	    my $ownport = $3;
	    my $peeraddr = inet_ntoa($ipaddr = gethostbyname($4));
	    my $peerport = $5;
	    my $proto = $6;
	    my $role = $7;
	    my $generator = $8;
1117
	    my $target;
1118
	    my $source;
1119

1120
1121
1122
	    # Skip if not specified as a TG generator. At some point
	    # work in Shashi's NSE work.
	    if ($generator ne "TG") {
1123
1124
1125
1126
1127
1128
1129
		$startnse = 1;
		if (! $didopen) {
		    open(RC, ">" . TMTRAFFICCONFIG)
			or die("Could not open " . TMTRAFFICCONFIG . ": $!");
		    print RC "#!/bin/sh\n";
		    $didopen = 1;
		}
1130
1131
1132
		next;
	    }

1133
1134
	    if ($role eq "sink") {
		$target = "$ownaddr.$ownport";
1135
		$source = "$peeraddr.$peerport";
1136
1137
1138
	    }
	    else {
		$target = "$peeraddr.$peerport";
1139
		$source = "$ownaddr.$ownport";
1140
1141
1142
1143
1144
1145
1146
1147
	    }

	    if (! $didopen) {
		open(RC, ">" . TMTRAFFICCONFIG)
		    or die("Could not open " . TMTRAFFICCONFIG . ": $!");
		print RC "#!/bin/sh\n";
		$didopen = 1;
	    }
1148
	    print RC "$cmdline -N $name -S $source -T $target -P $proto -R $role >/tmp/${name}-${pid}-${eid}.debug 2>&1 &\n";
1149
1150
1151
1152
1153
	}
	else {
	    warn "*** WARNING: Bad traffic line: $_";
	}
    }
1154
    close(TRAFCFG);
1155
1156
1157
1158

    if( $startnse ) {
	print RC "$SETUPDIR/startnse &\n";
    }
1159
    CLOSETMCC($TM);
1160

1161
1162
1163
1164
1165
    #
    # XXX hack: workaround for tmcc cmd failure inside TCL
    #     storing the output of a few tmcc commands in
    #     $SETUPDIR files for use by NSE
    #    
1166
    open( NSECFG, ">$SETUPDIR/tmcc.nseconfigs" ) or die "Cannot open file $SETUPDIR/tmcc.nseconfigs: $!";
1167
1168
1169
1170
1171
1172
1173
1174
1175
    $TM = OPENTMCC(TMCCCMD_NSECONFIGS);
    $record_sep = $/;
    undef($/);
    my $nseconfig = <$TM>;
    $/ = $record_sep;
    print NSECFG $nseconfig;
    CLOSETMCC($TM);
    close(NSECFG);
	    
1176
1177
    # XXX hack: need a separate section for starting up NSE when we
    #           support simulated nodes
1178
    if( ! $startnse ) {
1179
1180
1181
	
	if( $nseconfig ) {

1182
	    # start NSE if 'tmcc nseconfigs' is not empty
1183
1184
1185
1186
1187
1188
1189
1190
1191
1192
	    if ( ! $didopen ) {
		open(RC, ">" . TMTRAFFICCONFIG)
		    or die("Could not open " . TMTRAFFICCONFIG . ": $!");
		print RC "#!/bin/sh\n";
		$didopen = 1;	
	    }
	    print RC "$SETUPDIR/startnse &\n";
	}
    }
    
1193
    if ($didopen) {
1194
	printf RC "%s %s\n", TMCC(), TMCCCMD_READY();
1195
1196
1197
1198
1199
1200
	close(RC);
	chmod(0755, TMTRAFFICCONFIG);
    }
    return 0;
}

1201
1202
1203
1204
1205
1206
1207
1208
1209
1210
1211
1212
1213
1214
1215
1216
1217
1218
1219
1220
1221
sub dotunnels()
{
    my @tunnels;
    my $pat;
    my $TM;
    my $didserver = 0;

    #
    # Kinda ugly, but there is too much perl goo included by Socket to put it
    # on the MFS. 
    # 
    if (MFS()) {
	return 1;
    }
    require Socket;
    import Socket;
    
    $TM = OPENTMCC(TMCCCMD_TUNNEL);
    while (<$TM>) {
	push(@tunnels, $_);
    }
1222
    CLOSETMCC($TM);
1223
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    if (! @tunnels) {
	return 0;
    }
    my ($pid, $eid, $vname) = check_status();

    open(RC, ">" . TMTUNNELCONFIG)
	or die("Could not open " . TMTUNNELCONFIG . ": $!");
    print RC "#!/bin/sh\n";
    print RC "kldload if_tap\n";

    open(CONF, ">" . TMVTUNDCONFIG)
	or die("Could not open " . TMVTUNDCONFIG . ": $!");

    print(CONF
	  "options {\n".
	  "  ifconfig    /sbin/ifconfig;\n".
	  "  route       /sbin/route;\n".
	  "}\n".
	  "\n".
	  "default {\n".
	  "  persist     yes;\n".
	  "  stat        yes;\n".
	  "  keepalive   yes;\n".
	  "  type        ether;\n".
	  "}\n".
	  "\n");
    
    $pat  = q(TUNNEL=([-\w.]+) ISSERVER=(\d) PEERIP=([-\w.]+) );
    $pat .= q(PEERPORT=(\d+) PASSWORD=([-\w.]+) );
    $pat .= q(ENCRYPT=(\d) COMPRESS=(\d) INET=([-\w.]+) );
    $pat .= q(MASK=([-\w.]+) PROTO=([-\w.]+));

    foreach my $tunnel (@tunnels) {
	if ($tunnel =~ /$pat/) {
	    #
	    # The following is specific to vtund!
	    #
	    my $name     = $1;
	    my $isserver = $2;
	    my $peeraddr = $3;
	    my $peerport = $4;
	    my $password = $5;
	    my $encrypt  = ($6 ? "yes" : "no");
	    my $compress = ($7 ? "yes" : "no");
	    my $inetip   = $8;
	    my $mask     = $9;
	    my $proto    = $10;
	    my $routearg = inet_ntoa(inet_aton($inetip) & inet_aton($mask));

	    my $cmd = "$VTUND -n -P $peerport -f ". TMVTUNDCONFIG;

	    if ($isserver) {
		if (!$didserver) {
		    print RC
			"$cmd -s >/tmp/vtund-${pid}-${eid}.debug 2>&1 &\n";
		    $didserver = 1;
		}
	    }
	    else {
		print RC "$cmd $name $peeraddr ".
		    " >/tmp/vtun-${pid}-${eid}-${name}.debug 2>&1 &\n";
	    }
	    #
	    # Sheesh, vtund fails if it sees "//" in a path. 
	    #
	    my $config = TMROUTECONFIG;
	    $config =~ s/\/\//\//g;
	    
	    print(CONF
		  "$name {\n".
		  "  password      $password;\n".
		  "  compress      $compress;\n".
		  "  encrypt       $encrypt;\n".
		  "  proto         $proto;\n".
		  "\n".
		  "  up {\n".
		  "    # Connection is Up\n".
		  "    ifconfig \"%% $inetip netmask $mask\";\n".
		  "    program " . $config . " \"$routearg up\" wait;\n".
		  "  };\n".
		  "  down {\n".
		  "    # Connection is Down\n".
		  "    ifconfig \"%% down\";\n".
		  "    program " . $config . " \"$routearg down\" wait;\n".
		  "  };\n".
		  "}\n\n");
	}
	else {
	    warn "*** WARNING: Bad tunnel line: $tunnel";
	}
    }

    close(RC);
    chmod(0755, TMTUNNELCONFIG);
    return 0;
}
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#
# Boot Startup code. This is invoked from the setup OS dependent script,
# and this fires up all the stuff above.
#
sub bootsetup()
{
    #
    # Inform the master that we have rebooted.
    #
    inform_reboot();

    #
    # Check allocation. Exit now if not allocated.
    #
    print STDOUT "Checking Testbed reservation status ... \n";
    if (! check_status()) {
	print STDOUT "  Free!\n";
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	cleanup_node(1);
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	return 0;
    }
    print STDOUT "  Allocated! $pid/$eid/$vname\n";

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    #
    # Cleanup node. Flag indicates to gently clean ...
    # 
    cleanup_node(0);

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    #
    # Setup a nicknames file. 
    #
    create_nicknames();

    #
    # Mount the project and user directories
    #
    print STDOUT "Mounting project and home directories ... \n";
    domounts();

    #
    # Do account stuff.
    # 
    print STDOUT "Checking Testbed group/user configuration ... \n";
    doaccounts();

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    if (! MFS()) {
	#
	# Okay, lets find out about interfaces.
	#
	print STDOUT "Checking Testbed interface configuration ... \n";
	doifconfig();
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        #
        # Do tunnels
        # 
        print STDOUT "Checking Testbed tunnel configuration ... \n";
        dotunnels();

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	#
	# Host names configuration (/etc/hosts). 
	#
	print STDOUT "Checking Testbed hostnames configuration ... \n";
	dohostnames();
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	#
	# Router Configuration.
	#
	print STDOUT "Checking Testbed routing configuration ... \n";
	dorouterconfig();
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	#
	# Make 32 BPF devices in /dev
	#
	select STDOUT; $| = 1;
	print STDOUT "Making /dev/bpf* devices ...";
	makebpfdevs();
	
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	#
	# Traffic generator Configuration.
	#
	print STDOUT "Checking Testbed traffic generation configuration ...\n";
	dotrafficconfig();

	#
	# RPMS
	# 
	print STDOUT "Checking Testbed RPM configuration ... \n";
	dorpms();

	#
	# Tar Balls
	# 
	print STDOUT "Checking Testbed Tarball configuration ... \n";
	dotarballs();
    }
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    #
    # Experiment startup Command.
    #
    print STDOUT "Checking Testbed Experiment Startup Command ... \n";
    dostartupcmd();

    #
    # OS specific stuff
    #
    os_setup();

    return 0;
}

#
# These are additional support routines for other setup scripts.
#
#
# Node update. This gets fired off after reboot to update accounts,
# mounts, etc. Its the start of shared node support. Quite rough at
# the moment. 
#
sub nodeupdate()
{
    #
    # Check allocation. If the node is now free, then do a cleanup
    # to reset the password files. The node should have its disk
    # reloaded to be safe, at the very least a reboot, but thats for
    # the future. We also need to kill processes belonging to people
    # whose accounts have been killed. Need to check the atq also for
    # queued commands.
    #
    if (! check_status()) {
	print "Node is free. Cleaning up password and group files.\n";
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	cleanup_node(1);
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	return 0;
    }

    #
    # Mount the project and user directories
    #
    print STDOUT "Mounting project and home directories ... \n";
    domounts();

    #
    # Host names configuration (/etc/hosts). 
    #
    print STDOUT "Checking Testbed hostnames configuration ... \n";
    dohostnames();

    #
    # Do account stuff.
    # 
    print STDOUT "Checking Testbed group/user configuration ... \n";
    doaccounts();

    return 0;
}

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# Remote node update. This gets fired off after reboot to update
# accounts, mounts, etc. Its the start of shared node support. Quite
# rough at the moment.
#
sub remotenodeupdate()
{
    #
    # Do account stuff.
    # 
    print STDOUT "Checking Testbed group/user configuration ... \n";
    doaccounts();

    return 0;
}

#
# Remote Node virtual node setup.
#
sub remotenodevnodesetup($)
{
    my ($vid) = @_;

    #
    # Set global vnodeid for tmcc commands.
    #
    $vnodeid = $vid;

    #
    # Make the directory where all this stuff is going to go.
    #
    if (! -e TMVNODEDIR) {
	mkdir(TMVNODEDIR, 0755) or
	    die("*** $0:\n".
		"    Could not mkdir " . TMVNODEDIR . ": $!\n");
    }
    
    #
    # Do tunnels
    # 
    print STDOUT "Checking Testbed tunnel configuration ... \n";
    dotunnels();

    #
    # Router Configuration.
    #
    print STDOUT "Checking Testbed routing configuration ... \n";
    dorouterconfig();

    #
    # Traffic generator Configuration.
    #
    print STDOUT "Checking Testbed traffic generation configuration ...\n";
    dotrafficconfig();

    return 0;
}

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#
# Report startupcmd status back to the TMCC. Called by the runstartup
# script. 
#
sub startcmdstatus($)
{
    my($status) = @_;

    RUNTMCC(TMCCCMD_STARTSTAT, "$status");
    return 0;
}

#
# Install deltas. Return 0 if nothing happened. Return -1 if there was
# an error. Return 1 if deltas installed, which tells the caller to reboot.
#
# This is going to get invoked very early in the boot process, possibly
# before the normal client initialization. So we have to do a few things
# to make things are consistent. 
#
sub install_deltas ()
{
    my @deltas = ();
    my $reboot = 0;

    #
    # Inform the master that we have rebooted.
    #
    inform_reboot();

    #
    # Check allocation. Exit now if not allocated.
    #
    if (! check_status()) {
	return 0;
    }

    #
    # Now do the actual delta install.
    # 
    my $TM = OPENTMCC(TMCCCMD_DELTA);
    while (<$TM>) {
	push(@deltas, $_);
    }
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    CLOSETMCC($TM);
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    #
    # No deltas. Just exit and let the boot continue.
    #
    if (! @deltas) {
	return 0;
    }

    #
    # Mount the project directory.
    #
    domounts();

    #
    # Install all the deltas, and hope they all install okay. We reboot
    # if any one does an actual install (they may already be installed).
    # If any fails, then give up.
    # 
    foreach $delta (@deltas) {
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	if ($delta =~ /DELTA=(.+)/) {
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	    print STDOUT  "Installing DELTA $1 ...\n";

	    system(sprintf($DELTAINSTALL, $1));
	    my $status = $? >> 8;
	    if ($status == 0) {
		$reboot = 1;
	    }
	    else {
		if ($status < 0) {
		    print STDOUT "Failed to install DELTA $1. Help!\n";
		    return -1;
		}
	    }
	}
    }
    return $reboot;
}

#
# Early on in the boot, we want to reset the hostname. This gets the
# nickname and returns it. 
#
# This is going to get invoked very early in the boot process, before the
# normal client initialization. So we have to do a few things to make
# things are consistent. 
#
sub whatsmynickname()
{
    #
    # Inform the master that we have rebooted. THIS MUST BE DONE!
    #
    inform_reboot();

    #
    # Check allocation. Exit now if not allocated.
    #
    if (! check_status()) {
	return 0;
    }

    return "$vname.$eid.$pid";
}

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#
# Put ourselves into the background, directing output to the log file.
# The caller provides the logfile name, which should have been created
# with mktemp, just to be safe. Returns the usual return of fork. 
#
# usage int TBBackGround(char *filename).
# 
sub TBBackGround($)
{
    my($logname) = @_;
    
    my $mypid = fork();
    if ($mypid) {
	return $mypid;
    }
    select(undef, undef, undef, 0.2);
    
    #
    # We have to disconnect from the caller by redirecting both STDIN and
    # STDOUT away from the pipe. Otherwise the caller (the web server) will
    # continue to wait even though the parent has exited. 
    #
    open(STDIN, "< /dev/null") or
	die("opening /dev/null for STDIN: $!");

    # Note different taint check (allow /).
    if ($logname =~ /^([-\@\w.\/]+)$/) {
	$logname = $1;
    } else {
	die("Bad data in logfile name: $logname\n");
    }

    open(STDERR, ">> $logname") or die("opening $logname for STDERR: $!");
    open(STDOUT, ">> $logname") or die("opening $logname for STDOUT: $!");

    return 0;
}

#
# Fork a process to exec a command. Return the pid to wait on.
# 
sub TBForkCmd($) {
    my ($cmd) = @_;
    my($mypid);

    $mypid = fork();
    if ($mypid) {
	return $mypid;
    }

    system($cmd);
    exit($? >> 8);
}

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#
# make some bpf devices in /dev
#
sub makebpfdevs() {

    my ($i) = 0;

    chomp($cwd = `pwd`);
    # Untaint the args.
    if ($cwd=~ /^([\/\w-]+)$/) {
	$cwd = $1;
    }

    chdir("/dev");
    while( $i < 32 ) {

	if( ! -e "bpf$i" ) {
	    system("./MAKEDEV bpf$i");
	    print STDOUT "."
	}
	
	$i++;
    }
    print STDOUT "\n";
    chdir($cwd);
    return 0;
}

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1;