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#!/usr/bin/perl -w
#
# Copyright 2010 - Steven Rostedt <srostedt@redhat.com>, Red Hat Inc.
# Licensed under the terms of the GNU GPL License version 2
#

use strict;
use IPC::Open2;
use Fcntl qw(F_GETFL F_SETFL O_NONBLOCK);
use File::Path qw(mkpath);
use File::Copy qw(cp);
use FileHandle;
use FindBin;

my $VERSION = "0.2";

$| = 1;

my %opt;
my %repeat_tests;
my %repeats;
my %evals;

#default opts
my %default = (
    "MAILER"			=> "sendmail",  # default mailer
    "EMAIL_ON_ERROR"		=> 1,
    "EMAIL_WHEN_FINISHED"	=> 1,
    "EMAIL_WHEN_CANCELED"	=> 0,
    "EMAIL_WHEN_STARTED"	=> 0,
    "NUM_TESTS"			=> 1,
    "TEST_TYPE"			=> "build",
    "BUILD_TYPE"		=> "randconfig",
    "MAKE_CMD"			=> "make",
    "CLOSE_CONSOLE_SIGNAL"	=> "INT",
    "TIMEOUT"			=> 120,
    "TMP_DIR"			=> "/tmp/ktest/\${MACHINE}",
    "SLEEP_TIME"		=> 60,	# sleep time between tests
    "BUILD_NOCLEAN"		=> 0,
    "REBOOT_ON_ERROR"		=> 0,
    "POWEROFF_ON_ERROR"		=> 0,
    "REBOOT_ON_SUCCESS"		=> 1,
    "POWEROFF_ON_SUCCESS"	=> 0,
    "BUILD_OPTIONS"		=> "",
    "BISECT_SLEEP_TIME"		=> 60,   # sleep time between bisects
    "PATCHCHECK_SLEEP_TIME"	=> 60, # sleep time between patch checks
    "CLEAR_LOG"			=> 0,
    "BISECT_MANUAL"		=> 0,
    "BISECT_SKIP"		=> 1,
    "BISECT_TRIES"		=> 1,
    "MIN_CONFIG_TYPE"		=> "boot",
    "SUCCESS_LINE"		=> "login:",
    "DETECT_TRIPLE_FAULT"	=> 1,
    "NO_INSTALL"		=> 0,
    "BOOTED_TIMEOUT"		=> 1,
    "DIE_ON_FAILURE"		=> 1,
    "SSH_EXEC"			=> "ssh \$SSH_USER\@\$MACHINE \$SSH_COMMAND",
    "SCP_TO_TARGET"		=> "scp \$SRC_FILE \$SSH_USER\@\$MACHINE:\$DST_FILE",
    "SCP_TO_TARGET_INSTALL"	=> "\${SCP_TO_TARGET}",
    "REBOOT"			=> "ssh \$SSH_USER\@\$MACHINE reboot",
    "STOP_AFTER_SUCCESS"	=> 10,
    "STOP_AFTER_FAILURE"	=> 60,
    "STOP_TEST_AFTER"		=> 600,
    "MAX_MONITOR_WAIT"		=> 1800,
    "GRUB_REBOOT"		=> "grub2-reboot",
    "SYSLINUX"			=> "extlinux",
    "SYSLINUX_PATH"		=> "/boot/extlinux",
    "CONNECT_TIMEOUT"		=> 25,

# required, and we will ask users if they don't have them but we keep the default
# value something that is common.
    "REBOOT_TYPE"		=> "grub",
    "LOCALVERSION"		=> "-test",
    "SSH_USER"			=> "root",
    "BUILD_TARGET"	 	=> "arch/x86/boot/bzImage",
    "TARGET_IMAGE"		=> "/boot/vmlinuz-test",

    "LOG_FILE"			=> undef,
    "IGNORE_UNUSED"		=> 0,
);

my $ktest_config = "ktest.conf";
my $version;
my $have_version = 0;
my $machine;
my $last_machine;
my $ssh_user;
my $tmpdir;
my $builddir;
my $outputdir;
my $output_config;
my $test_type;
my $build_type;
my $build_options;
my $final_post_ktest;
my $pre_ktest;
my $post_ktest;
my $pre_test;
my $post_test;
my $pre_build;
my $post_build;
my $pre_build_die;
my $post_build_die;
my $reboot_type;
my $reboot_script;
my $power_cycle;
my $reboot;
my $reboot_on_error;
my $switch_to_good;
my $switch_to_test;
my $poweroff_on_error;
my $reboot_on_success;
my $die_on_failure;
my $powercycle_after_reboot;
my $poweroff_after_halt;
my $max_monitor_wait;
my $ssh_exec;
my $scp_to_target;
my $scp_to_target_install;
my $power_off;
my $grub_menu;
my $last_grub_menu;
my $grub_file;
my $grub_number;
my $grub_reboot;
my $syslinux;
my $syslinux_path;
my $syslinux_label;
my $target;
my $make;
my $pre_install;
my $post_install;
my $no_install;
my $noclean;
my $minconfig;
my $start_minconfig;
my $start_minconfig_defined;
my $output_minconfig;
my $minconfig_type;
my $use_output_minconfig;
my $warnings_file;
my $ignore_config;
my $ignore_errors;
my $addconfig;
my $in_bisect = 0;
my $bisect_bad_commit = "";
my $reverse_bisect;
my $bisect_manual;
my $bisect_skip;
my $bisect_tries;
my $config_bisect_good;
my $bisect_ret_good;
my $bisect_ret_bad;
my $bisect_ret_skip;
my $bisect_ret_abort;
my $bisect_ret_default;
my $in_patchcheck = 0;
my $run_test;
my $buildlog;
my $testlog;
my $dmesg;
my $monitor_fp;
my $monitor_pid;
my $monitor_cnt = 0;
my $sleep_time;
my $bisect_sleep_time;
my $patchcheck_sleep_time;
my $ignore_warnings;
my $store_failures;
my $store_successes;
my $test_name;
my $timeout;
my $connect_timeout;
my $config_bisect_exec;
my $booted_timeout;
my $detect_triplefault;
my $console;
my $close_console_signal;
my $reboot_success_line;
my $success_line;
my $stop_after_success;
my $stop_after_failure;
my $stop_test_after;
my $build_target;
my $target_image;
my $checkout;
my $localversion;
my $iteration = 0;
my $successes = 0;
my $stty_orig;
my $run_command_status = 0;

my $bisect_good;
my $bisect_bad;
my $bisect_type;
my $bisect_start;
my $bisect_replay;
my $bisect_files;
my $bisect_reverse;
my $bisect_check;

my $config_bisect;
my $config_bisect_type;
my $config_bisect_check;

my $patchcheck_type;
my $patchcheck_start;
my $patchcheck_cherry;
my $patchcheck_end;

my $build_time;
my $install_time;
my $reboot_time;
my $test_time;

my $pwd;
my $dirname = $FindBin::Bin;

my $mailto;
my $mailer;
my $mail_path;
my $email_on_error;
my $email_when_finished;
my $email_when_started;
my $email_when_canceled;

my $script_start_time = localtime();

# set when a test is something other that just building or install
# which would require more options.
my $buildonly = 1;

# tell build not to worry about warnings, even when WARNINGS_FILE is set
my $warnings_ok = 0;

# set when creating a new config
my $newconfig = 0;

my %entered_configs;
my %config_help;
my %variable;

# force_config is the list of configs that we force enabled (or disabled)
# in a .config file. The MIN_CONFIG and ADD_CONFIG configs.
my %force_config;

# do not force reboots on config problems
my $no_reboot = 1;

# reboot on success
my $reboot_success = 0;

my %option_map = (
    "MAILTO"			=> \$mailto,
    "MAILER"			=> \$mailer,
    "MAIL_PATH"			=> \$mail_path,
    "EMAIL_ON_ERROR"		=> \$email_on_error,
    "EMAIL_WHEN_FINISHED"	=> \$email_when_finished,
    "EMAIL_WHEN_STARTED"	=> \$email_when_started,
    "EMAIL_WHEN_CANCELED"	=> \$email_when_canceled,
    "MACHINE"			=> \$machine,
    "SSH_USER"			=> \$ssh_user,
    "TMP_DIR"			=> \$tmpdir,
    "OUTPUT_DIR"		=> \$outputdir,
    "BUILD_DIR"			=> \$builddir,
    "TEST_TYPE"			=> \$test_type,
    "PRE_KTEST"			=> \$pre_ktest,
    "POST_KTEST"		=> \$post_ktest,
    "PRE_TEST"			=> \$pre_test,
    "POST_TEST"			=> \$post_test,
    "BUILD_TYPE"		=> \$build_type,
    "BUILD_OPTIONS"		=> \$build_options,
    "PRE_BUILD"			=> \$pre_build,
    "POST_BUILD"		=> \$post_build,
    "PRE_BUILD_DIE"		=> \$pre_build_die,
    "POST_BUILD_DIE"		=> \$post_build_die,
    "POWER_CYCLE"		=> \$power_cycle,
    "REBOOT"			=> \$reboot,
    "BUILD_NOCLEAN"		=> \$noclean,
    "MIN_CONFIG"		=> \$minconfig,
    "OUTPUT_MIN_CONFIG"		=> \$output_minconfig,
    "START_MIN_CONFIG"		=> \$start_minconfig,
    "MIN_CONFIG_TYPE"		=> \$minconfig_type,
    "USE_OUTPUT_MIN_CONFIG"	=> \$use_output_minconfig,
    "WARNINGS_FILE"		=> \$warnings_file,
    "IGNORE_CONFIG"		=> \$ignore_config,
    "TEST"			=> \$run_test,
    "ADD_CONFIG"		=> \$addconfig,
    "REBOOT_TYPE"		=> \$reboot_type,
    "GRUB_MENU"			=> \$grub_menu,
    "GRUB_FILE"			=> \$grub_file,
    "GRUB_REBOOT"		=> \$grub_reboot,
    "SYSLINUX"			=> \$syslinux,
    "SYSLINUX_PATH"		=> \$syslinux_path,
    "SYSLINUX_LABEL"		=> \$syslinux_label,
    "PRE_INSTALL"		=> \$pre_install,
    "POST_INSTALL"		=> \$post_install,
    "NO_INSTALL"		=> \$no_install,
    "REBOOT_SCRIPT"		=> \$reboot_script,
    "REBOOT_ON_ERROR"		=> \$reboot_on_error,
    "SWITCH_TO_GOOD"		=> \$switch_to_good,
    "SWITCH_TO_TEST"		=> \$switch_to_test,
    "POWEROFF_ON_ERROR"		=> \$poweroff_on_error,
    "REBOOT_ON_SUCCESS"		=> \$reboot_on_success,
    "DIE_ON_FAILURE"		=> \$die_on_failure,
    "POWER_OFF"			=> \$power_off,
    "POWERCYCLE_AFTER_REBOOT"	=> \$powercycle_after_reboot,
    "POWEROFF_AFTER_HALT"	=> \$poweroff_after_halt,
    "MAX_MONITOR_WAIT"		=> \$max_monitor_wait,
    "SLEEP_TIME"		=> \$sleep_time,
    "BISECT_SLEEP_TIME"		=> \$bisect_sleep_time,
    "PATCHCHECK_SLEEP_TIME"	=> \$patchcheck_sleep_time,
    "IGNORE_WARNINGS"		=> \$ignore_warnings,
    "IGNORE_ERRORS"		=> \$ignore_errors,
    "BISECT_MANUAL"		=> \$bisect_manual,
    "BISECT_SKIP"		=> \$bisect_skip,
    "BISECT_TRIES"		=> \$bisect_tries,
    "CONFIG_BISECT_GOOD"	=> \$config_bisect_good,
    "BISECT_RET_GOOD"		=> \$bisect_ret_good,
    "BISECT_RET_BAD"		=> \$bisect_ret_bad,
    "BISECT_RET_SKIP"		=> \$bisect_ret_skip,
    "BISECT_RET_ABORT"		=> \$bisect_ret_abort,
    "BISECT_RET_DEFAULT"	=> \$bisect_ret_default,
    "STORE_FAILURES"		=> \$store_failures,
    "STORE_SUCCESSES"		=> \$store_successes,
    "TEST_NAME"			=> \$test_name,
    "TIMEOUT"			=> \$timeout,
    "CONNECT_TIMEOUT"		=> \$connect_timeout,
    "CONFIG_BISECT_EXEC"	=> \$config_bisect_exec,
    "BOOTED_TIMEOUT"		=> \$booted_timeout,
    "CONSOLE"			=> \$console,
    "CLOSE_CONSOLE_SIGNAL"	=> \$close_console_signal,
    "DETECT_TRIPLE_FAULT"	=> \$detect_triplefault,
    "SUCCESS_LINE"		=> \$success_line,
    "REBOOT_SUCCESS_LINE"	=> \$reboot_success_line,
    "STOP_AFTER_SUCCESS"	=> \$stop_after_success,
    "STOP_AFTER_FAILURE"	=> \$stop_after_failure,
    "STOP_TEST_AFTER"		=> \$stop_test_after,
    "BUILD_TARGET"		=> \$build_target,
    "SSH_EXEC"			=> \$ssh_exec,
    "SCP_TO_TARGET"		=> \$scp_to_target,
    "SCP_TO_TARGET_INSTALL"	=> \$scp_to_target_install,
    "CHECKOUT"			=> \$checkout,
    "TARGET_IMAGE"		=> \$target_image,
    "LOCALVERSION"		=> \$localversion,

    "BISECT_GOOD"		=> \$bisect_good,
    "BISECT_BAD"		=> \$bisect_bad,
    "BISECT_TYPE"		=> \$bisect_type,
    "BISECT_START"		=> \$bisect_start,
    "BISECT_REPLAY"		=> \$bisect_replay,
    "BISECT_FILES"		=> \$bisect_files,
    "BISECT_REVERSE"		=> \$bisect_reverse,
    "BISECT_CHECK"		=> \$bisect_check,

    "CONFIG_BISECT"		=> \$config_bisect,
    "CONFIG_BISECT_TYPE"	=> \$config_bisect_type,
    "CONFIG_BISECT_CHECK"	=> \$config_bisect_check,

    "PATCHCHECK_TYPE"		=> \$patchcheck_type,
    "PATCHCHECK_START"		=> \$patchcheck_start,
    "PATCHCHECK_CHERRY"		=> \$patchcheck_cherry,
    "PATCHCHECK_END"		=> \$patchcheck_end,
);

# Options may be used by other options, record them.
my %used_options;

# default variables that can be used
chomp ($variable{"PWD"} = `pwd`);
$pwd = $variable{"PWD"};

$config_help{"MACHINE"} = << "EOF"
 The machine hostname that you will test.
 For build only tests, it is still needed to differentiate log files.
EOF
    ;
$config_help{"SSH_USER"} = << "EOF"
 The box is expected to have ssh on normal bootup, provide the user
  (most likely root, since you need privileged operations)
EOF
    ;
$config_help{"BUILD_DIR"} = << "EOF"
 The directory that contains the Linux source code (full path).
 You can use \${PWD} that will be the path where ktest.pl is run, or use
 \${THIS_DIR} which is assigned \${PWD} but may be changed later.
EOF
    ;
$config_help{"OUTPUT_DIR"} = << "EOF"
 The directory that the objects will be built (full path).
 (can not be same as BUILD_DIR)
 You can use \${PWD} that will be the path where ktest.pl is run, or use
 \${THIS_DIR} which is assigned \${PWD} but may be changed later.
EOF
    ;
$config_help{"BUILD_TARGET"} = << "EOF"
 The location of the compiled file to copy to the target.
 (relative to OUTPUT_DIR)
EOF
    ;
$config_help{"BUILD_OPTIONS"} = << "EOF"
 Options to add to \"make\" when building.
 i.e.  -j20
EOF
    ;
$config_help{"TARGET_IMAGE"} = << "EOF"
 The place to put your image on the test machine.
EOF
    ;
$config_help{"POWER_CYCLE"} = << "EOF"
 A script or command to reboot the box.

 Here is a digital loggers power switch example
 POWER_CYCLE = wget --no-proxy -O /dev/null -q  --auth-no-challenge 'http://admin:admin\@power/outlet?5=CCL'

 Here is an example to reboot a virtual box on the current host
 with the name "Guest".
 POWER_CYCLE = virsh destroy Guest; sleep 5; virsh start Guest
EOF
    ;
$config_help{"CONSOLE"} = << "EOF"
 The script or command that reads the console

  If you use ttywatch server, something like the following would work.
CONSOLE = nc -d localhost 3001

 For a virtual machine with guest name "Guest".
CONSOLE =  virsh console Guest
EOF
    ;
$config_help{"LOCALVERSION"} = << "EOF"
 Required version ending to differentiate the test
 from other linux builds on the system.
EOF
    ;
$config_help{"REBOOT_TYPE"} = << "EOF"
 Way to reboot the box to the test kernel.
 Only valid options so far are "grub", "grub2", "syslinux", and "script".

 If you specify grub, it will assume grub version 1
 and will search in /boot/grub/menu.lst for the title \$GRUB_MENU
 and select that target to reboot to the kernel. If this is not
 your setup, then specify "script" and have a command or script
 specified in REBOOT_SCRIPT to boot to the target.

 The entry in /boot/grub/menu.lst must be entered in manually.
 The test will not modify that file.

 If you specify grub2, then you also need to specify both \$GRUB_MENU
 and \$GRUB_FILE.

 If you specify syslinux, then you may use SYSLINUX to define the syslinux
 command (defaults to extlinux), and SYSLINUX_PATH to specify the path to
 the syslinux install (defaults to /boot/extlinux). But you have to specify
 SYSLINUX_LABEL to define the label to boot to for the test kernel.
EOF
    ;
$config_help{"GRUB_MENU"} = << "EOF"
 The grub title name for the test kernel to boot
 (Only mandatory if REBOOT_TYPE = grub or grub2)

 Note, ktest.pl will not update the grub menu.lst, you need to
 manually add an option for the test. ktest.pl will search
 the grub menu.lst for this option to find what kernel to
 reboot into.

 For example, if in the /boot/grub/menu.lst the test kernel title has:
 title Test Kernel
 kernel vmlinuz-test
 GRUB_MENU = Test Kernel

 For grub2, a search of \$GRUB_FILE is performed for the lines
 that begin with "menuentry". It will not detect submenus. The
 menu must be a non-nested menu. Add the quotes used in the menu
 to guarantee your selection, as the first menuentry with the content
 of \$GRUB_MENU that is found will be used.
EOF
    ;
$config_help{"GRUB_FILE"} = << "EOF"
 If grub2 is used, the full path for the grub.cfg file is placed
 here. Use something like /boot/grub2/grub.cfg to search.
EOF
    ;
$config_help{"SYSLINUX_LABEL"} = << "EOF"
 If syslinux is used, the label that boots the target kernel must
 be specified with SYSLINUX_LABEL.
EOF
    ;
$config_help{"REBOOT_SCRIPT"} = << "EOF"
 A script to reboot the target into the test kernel
 (Only mandatory if REBOOT_TYPE = script)
EOF
    ;

sub _logit {
    if (defined($opt{"LOG_FILE"})) {
	open(OUT, ">> $opt{LOG_FILE}") or die "Can't write to $opt{LOG_FILE}";
	print OUT @_;
	close(OUT);
    }
}

sub logit {
    if (defined($opt{"LOG_FILE"})) {
	_logit @_;
    } else {
	print @_;
    }
}

sub doprint {
    print @_;
    _logit @_;
}

sub read_prompt {
    my ($cancel, $prompt) = @_;

    my $ans;

    for (;;) {
	if ($cancel) {
	    print "$prompt [y/n/C] ";
	} else {
	    print "$prompt [Y/n] ";
	}
	$ans = <STDIN>;
	chomp $ans;
	if ($ans =~ /^\s*$/) {
	    if ($cancel) {
		$ans = "c";
	    } else {
		$ans = "y";
	    }
	}
	last if ($ans =~ /^y$/i || $ans =~ /^n$/i);
	if ($cancel) {
	    last if ($ans =~ /^c$/i);
	    print "Please answer either 'y', 'n' or 'c'.\n";
	} else {
	    print "Please answer either 'y' or 'n'.\n";
	}
    }
    if ($ans =~ /^c/i) {
	exit;
    }
    if ($ans !~ /^y$/i) {
	return 0;
    }
    return 1;
}

sub read_yn {
    my ($prompt) = @_;

    return read_prompt 0, $prompt;
}

sub read_ync {
    my ($prompt) = @_;

    return read_prompt 1, $prompt;
}

sub get_mandatory_config {
    my ($config) = @_;
    my $ans;

    return if (defined($opt{$config}));

    if (defined($config_help{$config})) {
	print "\n";
	print $config_help{$config};
    }

    for (;;) {
	print "$config = ";
	if (defined($default{$config}) && length($default{$config})) {
	    print "\[$default{$config}\] ";
	}
	$ans = <STDIN>;
	$ans =~ s/^\s*(.*\S)\s*$/$1/;
	if ($ans =~ /^\s*$/) {
	    if ($default{$config}) {
		$ans = $default{$config};
	    } else {
		print "Your answer can not be blank\n";
		next;
	    }
	}
	$entered_configs{$config} = ${ans};
	last;
    }
}

sub show_time {
    my ($time) = @_;

    my $hours = 0;
    my $minutes = 0;

    if ($time > 3600) {
	$hours = int($time / 3600);
	$time -= $hours * 3600;
    }
    if ($time > 60) {
	$minutes = int($time / 60);
	$time -= $minutes * 60;
    }

    if ($hours > 0) {
	doprint "$hours hour";
	doprint "s" if ($hours > 1);
	doprint " ";
    }

    if ($minutes > 0) {
	doprint "$minutes minute";
	doprint "s" if ($minutes > 1);
	doprint " ";
    }

    doprint "$time second";
    doprint "s" if ($time != 1);
}

sub print_times {
    doprint "\n";
    if ($build_time) {
	doprint "Build time:   ";
	show_time($build_time);
	doprint "\n";
    }
    if ($install_time) {
	doprint "Install time: ";
	show_time($install_time);
	doprint "\n";
    }
    if ($reboot_time) {
	doprint "Reboot time:  ";
	show_time($reboot_time);
	doprint "\n";
    }
    if ($test_time) {
	doprint "Test time:    ";
	show_time($test_time);
	doprint "\n";
    }
    # reset for iterations like bisect
    $build_time = 0;
    $install_time = 0;
    $reboot_time = 0;
    $test_time = 0;
}

sub get_mandatory_configs {
    get_mandatory_config("MACHINE");
    get_mandatory_config("BUILD_DIR");
    get_mandatory_config("OUTPUT_DIR");

    if ($newconfig) {
	get_mandatory_config("BUILD_OPTIONS");
    }

    # options required for other than just building a kernel
    if (!$buildonly) {
	get_mandatory_config("POWER_CYCLE");
	get_mandatory_config("CONSOLE");
    }

    # options required for install and more
    if ($buildonly != 1) {
	get_mandatory_config("SSH_USER");
	get_mandatory_config("BUILD_TARGET");
	get_mandatory_config("TARGET_IMAGE");
    }

    get_mandatory_config("LOCALVERSION");

    return if ($buildonly);

    my $rtype = $opt{"REBOOT_TYPE"};

    if (!defined($rtype)) {
	if (!defined($opt{"GRUB_MENU"})) {
	    get_mandatory_config("REBOOT_TYPE");
	    $rtype = $entered_configs{"REBOOT_TYPE"};
	} else {
	    $rtype = "grub";
	}
    }

    if ($rtype eq "grub") {
	get_mandatory_config("GRUB_MENU");
    }

    if ($rtype eq "grub2") {
	get_mandatory_config("GRUB_MENU");
	get_mandatory_config("GRUB_FILE");
    }

    if ($rtype eq "syslinux") {
	get_mandatory_config("SYSLINUX_LABEL");
    }
}

sub process_variables {
    my ($value, $remove_undef) = @_;
    my $retval = "";

    # We want to check for '\', and it is just easier
    # to check the previous characet of '$' and not need
    # to worry if '$' is the first character. By adding
    # a space to $value, we can just check [^\\]\$ and
    # it will still work.
    $value = " $value";

    while ($value =~ /(.*?[^\\])\$\{(.*?)\}(.*)/) {
	my $begin = $1;
	my $var = $2;
	my $end = $3;
	# append beginning of value to retval
	$retval = "$retval$begin";
	if (defined($variable{$var})) {
	    $retval = "$retval$variable{$var}";
	} elsif (defined($remove_undef) && $remove_undef) {
	    # for if statements, any variable that is not defined,
	    # we simple convert to 0
	    $retval = "${retval}0";
	} else {
	    # put back the origin piece.
	    $retval = "$retval\$\{$var\}";
	    # This could be an option that is used later, save
	    # it so we don't warn if this option is not one of
	    # ktests options.
	    $used_options{$var} = 1;
	}
	$value = $end;
    }
    $retval = "$retval$value";

    # remove the space added in the beginning
    $retval =~ s/ //;

    return "$retval"
}

sub set_value {
    my ($lvalue, $rvalue, $override, $overrides, $name) = @_;

    my $prvalue = process_variables($rvalue);

    if ($lvalue =~ /^(TEST|BISECT|CONFIG_BISECT)_TYPE(\[.*\])?$/ &&
	$prvalue !~ /^(config_|)bisect$/ &&
	$prvalue !~ /^build$/ &&
	$buildonly) {

	# Note if a test is something other than build, then we
	# will need other mandatory options.
	if ($prvalue ne "install") {
	    $buildonly = 0;
	} else {
	    # install still limits some mandatory options.
	    $buildonly = 2;
	}
    }

    if (defined($opt{$lvalue})) {
	if (!$override || defined(${$overrides}{$lvalue})) {
	    my $extra = "";
	    if ($override) {
		$extra = "In the same override section!\n";
	    }
	    die "$name: $.: Option $lvalue defined more than once!\n$extra";
	}
	${$overrides}{$lvalue} = $prvalue;
    }

    $opt{$lvalue} = $prvalue;
}

sub set_eval {
    my ($lvalue, $rvalue, $name) = @_;

    my $prvalue = process_variables($rvalue);
    my $arr;

    if (defined($evals{$lvalue})) {
	$arr = $evals{$lvalue};
    } else {
	$arr = [];
	$evals{$lvalue} = $arr;
    }

    push @{$arr}, $rvalue;
}

sub set_variable {
    my ($lvalue, $rvalue) = @_;

    if ($rvalue =~ /^\s*$/) {
	delete $variable{$lvalue};
    } else {
	$rvalue = process_variables($rvalue);
	$variable{$lvalue} = $rvalue;
    }
}

sub process_compare {
    my ($lval, $cmp, $rval) = @_;

    # remove whitespace

    $lval =~ s/^\s*//;
    $lval =~ s/\s*$//;

    $rval =~ s/^\s*//;
    $rval =~ s/\s*$//;

    if ($cmp eq "==") {
	return $lval eq $rval;
    } elsif ($cmp eq "!=") {
	return $lval ne $rval;
    } elsif ($cmp eq "=~") {
	return $lval =~ m/$rval/;
    } elsif ($cmp eq "!~") {
	return $lval !~ m/$rval/;
    }

    my $statement = "$lval $cmp $rval";
    my $ret = eval $statement;

    # $@ stores error of eval
    if ($@) {
	return -1;
    }

    return $ret;
}

sub value_defined {
    my ($val) = @_;

    return defined($variable{$2}) ||
	defined($opt{$2});
}

my $d = 0;
sub process_expression {
    my ($name, $val) = @_;

    my $c = $d++;

    while ($val =~ s/\(([^\(]*?)\)/\&\&\&\&VAL\&\&\&\&/) {
	my $express = $1;

	if (process_expression($name, $express)) {
	    $val =~ s/\&\&\&\&VAL\&\&\&\&/ 1 /;
	} else {
	    $val =~ s/\&\&\&\&VAL\&\&\&\&/ 0 /;
	}
    }

    $d--;
    my $OR = "\\|\\|";
    my $AND = "\\&\\&";

    while ($val =~ s/^(.*?)($OR|$AND)//) {
	my $express = $1;
	my $op = $2;

	if (process_expression($name, $express)) {
	    if ($op eq "||") {
		return 1;
	    }
	} else {
	    if ($op eq "&&") {
		return 0;
	    }
	}
    }

    if ($val =~ /(.*)(==|\!=|>=|<=|>|<|=~|\!~)(.*)/) {
	my $ret = process_compare($1, $2, $3);
	if ($ret < 0) {
	    die "$name: $.: Unable to process comparison\n";
	}
	return $ret;
    }

    if ($val =~ /^\s*(NOT\s*)?DEFINED\s+(\S+)\s*$/) {
	if (defined $1) {
	    return !value_defined($2);
	} else {
	    return value_defined($2);
	}
    }

    if ($val =~ /^\s*0\s*$/) {
	return 0;
    } elsif ($val =~ /^\s*\d+\s*$/) {
	return 1;
    }

    die ("$name: $.: Undefined content $val in if statement\n");
}

sub process_if {
    my ($name, $value) = @_;

    # Convert variables and replace undefined ones with 0
    my $val = process_variables($value, 1);
    my $ret = process_expression $name, $val;

    return $ret;
}

sub __read_config {
    my ($config, $current_test_num) = @_;

    my $in;
    open($in, $config) || die "can't read file $config";

    my $name = $config;
    $name =~ s,.*/(.*),$1,;

    my $test_num = $$current_test_num;
    my $default = 1;
    my $repeat = 1;
    my $num_tests_set = 0;
    my $skip = 0;
    my $rest;
    my $line;
    my $test_case = 0;
    my $if = 0;
    my $if_set = 0;
    my $override = 0;

    my %overrides;

    while (<$in>) {

	# ignore blank lines and comments
	next if (/^\s*$/ || /\s*\#/);

	if (/^\s*(TEST_START|DEFAULTS)\b(.*)/) {

	    my $type = $1;
	    $rest = $2;
	    $line = $2;

	    my $old_test_num;
	    my $old_repeat;
	    $override = 0;

	    if ($type eq "TEST_START") {

		if ($num_tests_set) {
		    die "$name: $.: Can not specify both NUM_TESTS and TEST_START\n";
		}

		$old_test_num = $test_num;
		$old_repeat = $repeat;

		$test_num += $repeat;
		$default = 0;
		$repeat = 1;
	    } else {
		$default = 1;
	    }

	    # If SKIP is anywhere in the line, the command will be skipped
	    if ($rest =~ s/\s+SKIP\b//) {
		$skip = 1;
	    } else {
		$test_case = 1;
		$skip = 0;
	    }

	    if ($rest =~ s/\sELSE\b//) {
		if (!$if) {
		    die "$name: $.: ELSE found with out matching IF section\n$_";
		}
		$if = 0;

		if ($if_set) {
		    $skip = 1;
		} else {
		    $skip = 0;
		}
	    }

	    if ($rest =~ s/\sIF\s+(.*)//) {
		if (process_if($name, $1)) {
		    $if_set = 1;
		} else {
		    $skip = 1;
		}
		$if = 1;
	    } else {
		$if = 0;
		$if_set = 0;
	    }

	    if (!$skip) {
		if ($type eq "TEST_START") {
		    if ($rest =~ s/\s+ITERATE\s+(\d+)//) {
			$repeat = $1;
			$repeat_tests{"$test_num"} = $repeat;
		    }
		} elsif ($rest =~ s/\sOVERRIDE\b//) {
		    # DEFAULT only
		    $override = 1;
		    # Clear previous overrides
		    %overrides = ();
		}
	    }

	    if (!$skip && $rest !~ /^\s*$/) {
		die "$name: $.: Gargbage found after $type\n$_";
	    }

	    if ($skip && $type eq "TEST_START") {
		$test_num = $old_test_num;
		$repeat = $old_repeat;
	    }

	} elsif (/^\s*ELSE\b(.*)$/) {
	    if (!$if) {
		die "$name: $.: ELSE found with out matching IF section\n$_";
	    }
	    $rest = $1;
	    if ($if_set) {
		$skip = 1;
		$rest = "";
	    } else {
		$skip = 0;

		if ($rest =~ /\sIF\s+(.*)/) {
		    # May be a ELSE IF section.
		    if (process_if($name, $1)) {
			$if_set = 1;
		    } else {
			$skip = 1;
		    }
		    $rest = "";
		} else {
		    $if = 0;
		}
	    }

	    if ($rest !~ /^\s*$/) {
		die "$name: $.: Gargbage found after DEFAULTS\n$_";
	    }

	} elsif (/^\s*INCLUDE\s+(\S+)/) {

	    next if ($skip);

	    if (!$default) {
		die "$name: $.: INCLUDE can only be done in default sections\n$_";
	    }

	    my $file = process_variables($1);

	    if ($file !~ m,^/,) {
		# check the path of the config file first
		if ($config =~ m,(.*)/,) {
		    if (-f "$1/$file") {
			$file = "$1/$file";
		    }
		}
	    }
		
	    if ( ! -r $file ) {
		die "$name: $.: Can't read file $file\n$_";
	    }

	    if (__read_config($file, \$test_num)) {
		$test_case = 1;
	    }

	} elsif (/^\s*([A-Z_\[\]\d]+)\s*=~\s*(.*?)\s*$/) {

	    next if ($skip);

	    my $lvalue = $1;
	    my $rvalue = $2;

	    if ($default || $lvalue =~ /\[\d+\]$/) {
		set_eval($lvalue, $rvalue, $name);
	    } else {
		my $val = "$lvalue\[$test_num\]";
		set_eval($val, $rvalue, $name);
	    }

	} elsif (/^\s*([A-Z_\[\]\d]+)\s*=\s*(.*?)\s*$/) {

	    next if ($skip);

	    my $lvalue = $1;
	    my $rvalue = $2;

	    if (!$default &&
		($lvalue eq "NUM_TESTS" ||
		 $lvalue eq "LOG_FILE" ||
		 $lvalue eq "CLEAR_LOG")) {
		die "$name: $.: $lvalue must be set in DEFAULTS section\n";
	    }

	    if ($lvalue eq "NUM_TESTS") {
		if ($test_num) {
		    die "$name: $.: Can not specify both NUM_TESTS and TEST_START\n";
		}
		if (!$default) {
		    die "$name: $.: NUM_TESTS must be set in default section\n";
		}
		$num_tests_set = 1;
	    }

	    if ($default || $lvalue =~ /\[\d+\]$/) {
		set_value($lvalue, $rvalue, $override, \%overrides, $name);
	    } else {
		my $val = "$lvalue\[$test_num\]";
		set_value($val, $rvalue, $override, \%overrides, $name);

		if ($repeat > 1) {
		    $repeats{$val} = $repeat;
		}
	    }
	} elsif (/^\s*([A-Z_\[\]\d]+)\s*:=\s*(.*?)\s*$/) {
	    next if ($skip);

	    my $lvalue = $1;
	    my $rvalue = $2;

	    # process config variables.
	    # Config variables are only active while reading the
	    # config and can be defined anywhere. They also ignore
	    # TEST_START and DEFAULTS, but are skipped if they are in
	    # on of these sections that have SKIP defined.
	    # The save variable can be
	    # defined multiple times and the new one simply overrides
	    # the prevous one.
	    set_variable($lvalue, $rvalue);

	} else {
	    die "$name: $.: Garbage found in config\n$_";
	}
    }

    if ($test_num) {
	$test_num += $repeat - 1;
	$opt{"NUM_TESTS"} = $test_num;
    }

    close($in);

    $$current_test_num = $test_num;

    return $test_case;
}

sub get_test_case {
	print "What test case would you like to run?\n";
	print " (build, install or boot)\n";
	print " Other tests are available but require editing ktest.conf\n";
	print " (see tools/testing/ktest/sample.conf)\n";
	my $ans = <STDIN>;
	chomp $ans;
	$default{"TEST_TYPE"} = $ans;
}

sub read_config {
    my ($config) = @_;

    my $test_case;
    my $test_num = 0;

    $test_case = __read_config $config, \$test_num;

    # make sure we have all mandatory configs
    get_mandatory_configs;

    # was a test specified?
    if (!$test_case) {
	print "No test case specified.\n";
	get_test_case;
    }

    # set any defaults

    foreach my $default (keys %default) {
	if (!defined($opt{$default})) {
	    $opt{$default} = $default{$default};
	}
    }

    if ($opt{"IGNORE_UNUSED"} == 1) {
	return;
    }

    my %not_used;

    # check if there are any stragglers (typos?)
    foreach my $option (keys %opt) {
	my $op = $option;
	# remove per test labels.
	$op =~ s/\[.*\]//;
	if (!exists($option_map{$op}) &&
	    !exists($default{$op}) &&
	    !exists($used_options{$op})) {
	    $not_used{$op} = 1;
	}
    }

    if (%not_used) {
	my $s = "s are";
	$s = " is" if (keys %not_used == 1);
	print "The following option$s not used; could be a typo:\n";
	foreach my $option (keys %not_used) {
	    print "$option\n";
	}
	print "Set IGRNORE_UNUSED = 1 to have ktest ignore unused variables\n";
	if (!read_yn "Do you want to continue?") {
	    exit -1;
	}
    }
}

sub __eval_option {
    my ($name, $option, $i) = @_;

    # Add space to evaluate the character before $
    $option = " $option";
    my $retval = "";
    my $repeated = 0;
    my $parent = 0;

    foreach my $test (keys %repeat_tests) {
	if ($i >= $test &&
	    $i < $test + $repeat_tests{$test}) {

	    $repeated = 1;
	    $parent = $test;
	    last;
	}
    }

    while ($option =~ /(.*?[^\\])\$\{(.*?)\}(.*)/) {
	my $start = $1;
	my $var = $2;
	my $end = $3;

	# Append beginning of line
	$retval = "$retval$start";

	# If the iteration option OPT[$i] exists, then use that.
	# otherwise see if the default OPT (without [$i]) exists.

	my $o = "$var\[$i\]";
	my $parento = "$var\[$parent\]";

	# If a variable contains itself, use the default var
	if (($var eq $name) && defined($opt{$var})) {
	    $o = $opt{$var};
	    $retval = "$retval$o";
	} elsif (defined($opt{$o})) {
	    $o = $opt{$o};
	    $retval = "$retval$o";
	} elsif ($repeated && defined($opt{$parento})) {
	    $o = $opt{$parento};
	    $retval = "$retval$o";
	} elsif (defined($opt{$var})) {
	    $o = $opt{$var};
	    $retval = "$retval$o";
	} elsif ($var eq "KERNEL_VERSION" && defined($make)) {
	    # special option KERNEL_VERSION uses kernel version
	    get_version();
	    $retval = "$retval$version";
	} else {
	    $retval = "$retval\$\{$var\}";
	}

	$option = $end;
    }

    $retval = "$retval$option";

    $retval =~ s/^ //;

    return $retval;
}

sub process_evals {
    my ($name, $option, $i) = @_;

    my $option_name = "$name\[$i\]";
    my $ev;

    my $old_option = $option;

    if (defined($evals{$option_name})) {
	$ev = $evals{$option_name};
    } elsif (defined($evals{$name})) {
	$ev = $evals{$name};
    } else {
	return $option;
    }

    for my $e (@{$ev}) {
	eval "\$option =~ $e";
    }

    if ($option ne $old_option) {
	doprint("$name changed from '$old_option' to '$option'\n");
    }

    return $option;
}

sub eval_option {
    my ($name, $option, $i) = @_;

    my $prev = "";

    # Since an option can evaluate to another option,
    # keep iterating until we do not evaluate any more
    # options.
    my $r = 0;
    while ($prev ne $option) {
	# Check for recursive evaluations.
	# 100 deep should be more than enough.
	if ($r++ > 100) {
	    die "Over 100 evaluations accurred with $option\n" .
		"Check for recursive variables\n";
	}
	$prev = $option;
	$option = __eval_option($name, $option, $i);
    }

    $option = process_evals($name, $option, $i);

    return $option;
}

sub run_command;
sub start_monitor;
sub end_monitor;
sub wait_for_monitor;

sub reboot {
    my ($time) = @_;
    my $powercycle = 0;

    # test if the machine can be connected to within a few seconds
    my $stat = run_ssh("echo check machine status", $connect_timeout);
    if (!$stat) {
	doprint("power cycle\n");
	$powercycle = 1;
    }

    if ($powercycle) {
	run_command "$power_cycle";

	start_monitor;
	# flush out current monitor
	# May contain the reboot success line
	wait_for_monitor 1;

    } else {
	# Make sure everything has been written to disk
	run_ssh("sync");

	if (defined($time)) {
	    start_monitor;
	    # flush out current monitor
	    # May contain the reboot success line
	    wait_for_monitor 1;
	}

	# try to reboot normally
	if (run_command $reboot) {
	    if (defined($powercycle_after_reboot)) {
		sleep $powercycle_after_reboot;
		run_command "$power_cycle";
	    }
	} else {
	    # nope? power cycle it.
	    run_command "$power_cycle";
	}
    }

    if (defined($time)) {

	# We only want to get to the new kernel, don't fail
	# if we stumble over a call trace.
	my $save_ignore_errors = $ignore_errors;
	$ignore_errors = 1;

	# Look for the good kernel to boot
	if (wait_for_monitor($time, "Linux version")) {
	    # reboot got stuck?
	    doprint "Reboot did not finish. Forcing power cycle\n";
	    run_command "$power_cycle";
	}

	$ignore_errors = $save_ignore_errors;

	# Still need to wait for the reboot to finish
	wait_for_monitor($time, $reboot_success_line);

	end_monitor;
    }
}

sub reboot_to_good {
    my ($time) = @_;

    if (defined($switch_to_good)) {
	run_command $switch_to_good;
    }

    reboot $time;
}

sub do_not_reboot {
    my $i = $iteration;

    return $test_type eq "build" || $no_reboot ||
	($test_type eq "patchcheck" && $opt{"PATCHCHECK_TYPE[$i]"} eq "build") ||
	($test_type eq "bisect" && $opt{"BISECT_TYPE[$i]"} eq "build") ||
	($test_type eq "config_bisect" && $opt{"CONFIG_BISECT_TYPE[$i]"} eq "build");
}

my $in_die = 0;

sub dodie {

    # avoid recusion
    return if ($in_die);
    $in_die = 1;

    doprint "CRITICAL FAILURE... ", @_, "\n";

    my $i = $iteration;

    if ($reboot_on_error && !do_not_reboot) {

	doprint "REBOOTING\n";
	reboot_to_good;

    } elsif ($poweroff_on_error && defined($power_off)) {
	doprint "POWERING OFF\n";
	`$power_off`;
    }

    if (defined($opt{"LOG_FILE"})) {
	print " See $opt{LOG_FILE} for more info.\n";
    }

    if ($email_on_error) {
        send_email("KTEST: critical failure for your [$test_type] test",
                "Your test started at $script_start_time has failed with:\n@_\n");
    }

    if ($monitor_cnt) {
	    # restore terminal settings
	    system("stty $stty_orig");
    }

    if (defined($post_test)) {
	run_command $post_test;
    }

    die @_, "\n";
}

sub create_pty {
    my ($ptm, $pts) = @_;
    my $tmp;
    my $TIOCSPTLCK = 0x40045431;
    my $TIOCGPTN = 0x80045430;

    sysopen($ptm, "/dev/ptmx", O_RDWR | O_NONBLOCK) or
	dodie "Cant open /dev/ptmx";

    # unlockpt()
    $tmp = pack("i", 0);
    ioctl($ptm, $TIOCSPTLCK, $tmp) or
	dodie "ioctl TIOCSPTLCK for /dev/ptmx failed";

    # ptsname()
    ioctl($ptm, $TIOCGPTN, $tmp) or
	dodie "ioctl TIOCGPTN for /dev/ptmx failed";
    $tmp = unpack("i", $tmp);

    sysopen($pts, "/dev/pts/$tmp", O_RDWR | O_NONBLOCK) or
	dodie "Can't open /dev/pts/$tmp";
}

sub exec_console {
    my ($ptm, $pts) = @_;

    close($ptm);

    close(\*STDIN);
    close(\*STDOUT);
    close(\*STDERR);

    open(\*STDIN, '<&', $pts);
    open(\*STDOUT, '>&', $pts);
    open(\*STDERR, '>&', $pts);

    close($pts);

    exec $console or
	dodie "Can't open console $console";
}

sub open_console {
    my ($ptm) = @_;
    my $pts = \*PTSFD;
    my $pid;

    # save terminal settings
    $stty_orig = `stty -g`;

    # place terminal in cbreak mode so that stdin can be read one character at
    # a time without having to wait for a newline
    system("stty -icanon -echo -icrnl");

    create_pty($ptm, $pts);

    $pid = fork;

    if (!$pid) {
	# child
	exec_console($ptm, $pts)
    }

    # parent
    close($pts);

    return $pid;

    open(PTSFD, "Stop perl from warning about single use of PTSFD");
}

sub close_console {
    my ($fp, $pid) = @_;

    doprint "kill child process $pid\n";
    kill $close_console_signal, $pid;

    doprint "wait for child process $pid to exit\n";
    waitpid($pid, 0);

    print "closing!\n";
    close($fp);

    # restore terminal settings
    system("stty $stty_orig");
}

sub start_monitor {
    if ($monitor_cnt++) {
	return;
    }
    $monitor_fp = \*MONFD;
    $monitor_pid = open_console $monitor_fp;

    return;

    open(MONFD, "Stop perl from warning about single use of MONFD");
}

sub end_monitor {
    return if (!defined $console);
    if (--$monitor_cnt) {
	return;
    }
    close_console($monitor_fp, $monitor_pid);
}

sub wait_for_monitor {
    my ($time, $stop) = @_;
    my $full_line = "";
    my $line;
    my $booted = 0;
    my $start_time = time;
    my $skip_call_trace = 0;
    my $bug = 0;
    my $bug_ignored = 0;
    my $now;

    doprint "** Wait for monitor to settle down **\n";

    # read the monitor and wait for the system to calm down
    while (!$booted) {
	$line = wait_for_input($monitor_fp, $time);
	last if (!defined($line));
	print "$line";
	$full_line .= $line;

	if (defined($stop) && $full_line =~ /$stop/) {
	    doprint "wait for monitor detected $stop\n";
	    $booted = 1;
	}

	if ($full_line =~ /\[ backtrace testing \]/) {
	    $skip_call_trace = 1;
	}

	if ($full_line =~ /call trace:/i) {
	    if (!$bug && !$skip_call_trace) {
		if ($ignore_errors) {
		    $bug_ignored = 1;
		} else {
		    $bug = 1;
		}
	    }
	}

	if ($full_line =~ /\[ end of backtrace testing \]/) {
	    $skip_call_trace = 0;
	}

	if ($full_line =~ /Kernel panic -/) {
	    $bug = 1;
	}

	if ($line =~ /\n/) {
	    $full_line = "";
	}
	$now = time;
	if ($now - $start_time >= $max_monitor_wait) {
	    doprint "Exiting monitor flush due to hitting MAX_MONITOR_WAIT\n";
	    return 1;
	}
    }
    print "** Monitor flushed **\n";

    # if stop is defined but wasn't hit, return error
    # used by reboot (which wants to see a reboot)
    if (defined($stop) && !$booted) {
	$bug = 1;
    }
    return $bug;
}

sub save_logs {
	my ($result, $basedir) = @_;
	my @t = localtime;
	my $date = sprintf "%04d%02d%02d%02d%02d%02d",
		1900+$t[5],$t[4],$t[3],$t[2],$t[1],$t[0];

	my $type = $build_type;
	if ($type =~ /useconfig/) {
	    $type = "useconfig";
	}

	my $dir = "$machine-$test_type-$type-$result-$date";

	$dir = "$basedir/$dir";

	if (!-d $dir) {
	    mkpath($dir) or
		dodie "can't create $dir";
	}

	my %files = (
		"config" => $output_config,
		"buildlog" => $buildlog,
		"dmesg" => $dmesg,
		"testlog" => $testlog,
	);

	while (my ($name, $source) = each(%files)) {
		if (-f "$source") {
			cp "$source", "$dir/$name" or
				dodie "failed to copy $source";
		}
	}

	doprint "*** Saved info to $dir ***\n";
}

sub fail {

	if ($die_on_failure) {
		dodie @_;
	}

	doprint "FAILED\n";

	my $i = $iteration;

	# no need to reboot for just building.
	if (!do_not_reboot) {
	    doprint "REBOOTING\n";
	    reboot_to_good $sleep_time;
	}

	my $name = "";

	if (defined($test_name)) {
	    $name = " ($test_name)";
	}

	print_times;

	doprint "%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%\n";
	doprint "%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%\n";
	doprint "KTEST RESULT: TEST $i$name Failed: ", @_, "\n";
	doprint "%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%\n";
	doprint "%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%\n";

	if (defined($store_failures)) {
	    save_logs "fail", $store_failures;
        }

	if (defined($post_test)) {
		run_command $post_test;
	}

	return 1;
}

sub run_command {
    my ($command, $redirect, $timeout) = @_;
    my $start_time;
    my $end_time;
    my $dolog = 0;
    my $dord = 0;
    my $dostdout = 0;
    my $pid;

    $command =~ s/\$SSH_USER/$ssh_user/g;
    $command =~ s/\$MACHINE/$machine/g;

    doprint("$command ... ");
    $start_time = time;

    $pid = open(CMD, "$command 2>&1 |") or
	(fail "unable to exec $command" and return 0);

    if (defined($opt{"LOG_FILE"})) {
	open(LOG, ">>$opt{LOG_FILE}") or
	    dodie "failed to write to log";
	$dolog = 1;
    }

    if (defined($redirect)) {
	if ($redirect eq 1) {
	    $dostdout = 1;
	    # Have the output of the command on its own line
	    doprint "\n";
	} else {
	    open (RD, ">$redirect") or
		dodie "failed to write to redirect $redirect";
	    $dord = 1;
	}
    }

    my $hit_timeout = 0;

    while (1) {
	my $fp = \*CMD;
	if (defined($timeout)) {
	    doprint "timeout = $timeout\n";
	}
	my $line = wait_for_input($fp, $timeout);
	if (!defined($line)) {
	    my $now = time;
	    if (defined($timeout) && (($now - $start_time) >= $timeout)) {
		doprint "Hit timeout of $timeout, killing process\n";
		$hit_timeout = 1;
		kill 9, $pid;
	    }
	    last;
	}
	print LOG $line if ($dolog);
	print RD $line if ($dord);
	print $line if ($dostdout);
    }

    waitpid($pid, 0);
    # shift 8 for real exit status
    $run_command_status = $? >> 8;

    close(CMD);
    close(LOG) if ($dolog);
    close(RD)  if ($dord);

    $end_time = time;
    my $delta = $end_time - $start_time;

    if ($delta == 1) {
	doprint "[1 second] ";
    } else {
	doprint "[$delta seconds] ";
    }

    if ($hit_timeout) {
	$run_command_status = 1;
    }

    if ($run_command_status) {
	doprint "FAILED!\n";
    } else {
	doprint "SUCCESS\n";
    }

    return !$run_command_status;
}

sub run_ssh {
    my ($cmd, $timeout) = @_;
    my $cp_exec = $ssh_exec;

    $cp_exec =~ s/\$SSH_COMMAND/$cmd/g;
    return run_command "$cp_exec", undef , $timeout;
}

sub run_scp {
    my ($src, $dst, $cp_scp) = @_;

    $cp_scp =~ s/\$SRC_FILE/$src/g;
    $cp_scp =~ s/\$DST_FILE/$dst/g;

    return run_command "$cp_scp";
}

sub run_scp_install {
    my ($src, $dst) = @_;

    my $cp_scp = $scp_to_target_install;

    return run_scp($src, $dst, $cp_scp);
}

sub run_scp_mod {
    my ($src, $dst) = @_;

    my $cp_scp = $scp_to_target;

    return run_scp($src, $dst, $cp_scp);
}

sub get_grub2_index {

    return if (defined($grub_number) && defined($last_grub_menu) &&
	       $last_grub_menu eq $grub_menu && defined($last_machine) &&
	       $last_machine eq $machine);

    doprint "Find grub2 menu ... ";
    $grub_number = -1;

    my $ssh_grub = $ssh_exec;
    $ssh_grub =~ s,\$SSH_COMMAND,cat $grub_file,g;

    open(IN, "$ssh_grub |")
	or dodie "unable to get $grub_file";

    my $found = 0;

    while (<IN>) {
	if (/^menuentry.*$grub_menu/) {
	    $grub_number++;
	    $found = 1;
	    last;
	} elsif (/^menuentry\s/) {
	    $grub_number++;
	}
    }
    close(IN);

    dodie "Could not find '$grub_menu' in $grub_file on $machine"
	if (!$found);
    doprint "$grub_number\n";
    $last_grub_menu = $grub_menu;
    $last_machine = $machine;
}

sub get_grub_index {

    if ($reboot_type eq "grub2") {
	get_grub2_index;
	return;
    }

    if ($reboot_type ne "grub") {
	return;
    }
    return if (defined($grub_number) && defined($last_grub_menu) &&
	       $last_grub_menu eq $grub_menu && defined($last_machine) &&
	       $last_machine eq $machine);

    doprint "Find grub menu ... ";
    $grub_number = -1;

    my $ssh_grub = $ssh_exec;
    $ssh_grub =~ s,\$SSH_COMMAND,cat /boot/grub/menu.lst,g;

    open(IN, "$ssh_grub |")
	or dodie "unable to get menu.lst";

    my $found = 0;

    while (<IN>) {
	if (/^\s*title\s+$grub_menu\s*$/) {
	    $grub_number++;
	    $found = 1;
	    last;
	} elsif (/^\s*title\s/) {
	    $grub_number++;
	}
    }
    close(IN);

    dodie "Could not find '$grub_menu' in /boot/grub/menu on $machine"
	if (!$found);
    doprint "$gr