| Disable Functions: Path : /cpanel_installer/ |
| Current File : //cpanel_installer/install |
#!/usr/bin/perl
# cpanel - installd/install Copyright 2019 cPanel, L.L.C.
# All rights Reserved.
# copyright@cpanel.net http://cpanel.net
# This code is subject to the cPanel license. Unauthorized copying is prohibited
package installd::install;
use strict;
use warnings;
# Helper routines for the log.
our $message_caller_depth = 1;
my $log_fh;
my $COLOR_RED = 31;
my $COLOR_YELLOW = 33;
sub colorize_bold {
my ( $color, $msg ) = @_;
return $msg if !defined $color || -e q{/var/cpanel/disable_cpanel_terminal_colors};
$msg ||= '';
return chr(27) . '[1;' . $color . 'm' . $msg . chr(27) . '[0;m';
}
# space pad debug messages.
sub DEBUG($) { return _MSG( 'DEBUG', " " . shift ) } ## no critic(ProhibitSubroutinePrototypes)
sub ERROR($) { return _MSG( 'ERROR', colorize_bold( $COLOR_RED, shift ) ) } ## no critic(ProhibitSubroutinePrototypes)
sub WARN($) { return _MSG( 'WARN', colorize_bold( $COLOR_YELLOW, shift ) ) } ## no critic(ProhibitSubroutinePrototypes)
sub INFO($) { return _MSG( 'INFO', shift ) } ## no critic(ProhibitSubroutinePrototypes)
sub FATAL($) { _MSG( 'FATAL', colorize_bold( $COLOR_RED, shift ) ); die "\n"; } ## no critic(ProhibitSubroutinePrototypes)
use POSIX;
use Socket;
use Sys::Hostname ();
use IO::Handle ();
use IO::Select ();
use IPC::Open3 ();
use Cwd ();
use Getopt::Long ();
use constant PRODUCT_FULL => 1;
use constant PRODUCT_DNSONLY => 64;
use constant PRODUCT_DNSNODE => 2048;
use constant PRODUCT_MAILNODE => 4096;
use constant PRODUCT_DATABASENODE => 8192;
use constant PRODUCT_PAID => PRODUCT_FULL | PRODUCT_DNSNODE | PRODUCT_MAILNODE | PRODUCT_DATABASENODE;
my $yumcheck = 0;
my $force;
my $log_file = '/var/log/cpanel-install.log';
my $lock_file = '/root/installer.lock';
my $skip_apache = -e '/root/skipapache' ? 1 : 0;
my $skip_repo_setup = 0;
my $skip_license_check;
my $collect_output = undef;
my %TIER_CACHE;
my ( $wget_bin, $wget_args );
my $gpg_bin;
my $installstart;
my $original_pid = $$;
our $DEFAULT_MYIP_URL = q[https://myip.cpanel.net/v1.0/]; # default value
exit run(@ARGV) unless caller;
sub run {
my (@args) = @_;
my $ret = eval { script(@args) };
if ($@) {
chomp $@;
print STDERR $@;
return 1;
}
return $ret;
}
sub cleanup_lock_file_and_gpg_homedir {
if ( open my $fh, '<', $lock_file ) {
my $pid = <$fh>;
close $fh;
chomp $pid if ($pid);
if ( !$pid || $pid == $$ ) {
print "Removing $lock_file.\n";
unlink $lock_file;
}
}
if ( -d gpg_homedir() ) {
opendir( my $dh, gpg_homedir() );
my @files = readdir($dh);
closedir($dh);
@files = map { gpg_homedir() . "/" . $_ } grep { !/^\.{1,2}/ } @files;
unlink($_) for @files;
rmdir( gpg_homedir() );
}
return;
}
sub script {
my (@args) = @_;
local $ENV{'CPANEL_BASE_INSTALL'} = 1;
local $ENV{'LANG'} = 'C';
delete $ENV{'LANGUAGE'};
local $| = 1;
umask 022;
if ( open my $fh, '<', $lock_file ) {
print "The system detected an installer lock file: ($lock_file)\n";
print "Make certain that an installer is not already running.\n\n";
print "You can remove this file and re-run the cPanel installation process after you are certain that another installation is not already in progress.\n\n";
my $pid = <$fh>;
if ($pid) {
chomp $pid;
print `ps auxwww |grep $pid`;
}
else {
print "Warning: The system could not find pid information in the $lock_file file.\n";
}
return 1;
}
# Create the lock file.
if ( open my $fh, '>', $lock_file ) {
print {$fh} "$$\n";
close $fh;
}
else {
FATAL("Unable to write lock file $lock_file");
return 1;
}
$original_pid = $$;
END {
return if $$ != $original_pid;
# Required for testing.
return if $INC{'Test/More.pm'};
cleanup_lock_file_and_gpg_homedir();
}
# Open the install logs for append.
$installstart = open_logs();
# Determine local distro and version. Fail if unsupported.
my ( $distro, $distro_version, $distro_arch ) = check_system_support();
my $options = {};
Getopt::Long::GetOptionsFromArray(
\@args,
'force' => \$force,
'skip-cloudlinux' => \$options->{'skip-cloudlinux'},
'skipapache' => \$skip_apache,
'skipreposetup' => \$skip_repo_setup,
'skiplicensecheck' => \$skip_license_check,
);
recommend_version( $distro, $distro_version, $force );
# Validate hostname is FQDN.
check_hostname();
# Validate NetworkManager is off and uninstalled.
check_network_manager($distro_version);
# Do the clean install check pause right after
# network manager so they see the warning since
# this will pause for 5 seconds
clean_install_check();
# Validate that various files are in place.
check_files();
# Bootstrap checks.
INFO "Running health checks prior to start.";
check_resolv_conf();
check_yum_works();
my $ensure_rpms_installed;
if ( $ensure_rpms_installed = fork() ) {
#parent
}
else {
$collect_output = '';
# Must run before bootstrap to install wget if needed
local $@;
eval { ensure_rpms_installed( $distro, $distro_version ); };
print $collect_output;
undef $collect_output;
die if $@;
exit(0);
}
{
# While the ensure is running in the background
# we show the message warning that they need a clean
# server
local $SIG{'INT'} = sub {
kill( 'TERM', $ensure_rpms_installed );
WARN("Install terminated by user input");
exit(0);
};
warn_clean_server_needed();
local $?;
waitpid( $ensure_rpms_installed, 0 );
if ( $? != 0 ) {
die "ensure_rpms_install failed: $?";
}
}
# Assure minimum setup: wget & co
bootstrap( $distro, $distro_version );
my $install_version = get_cpanel_version();
# Install base distro required RPMS and setup YUM
my $lts = get_lts_version();
INFO "Installing cPanel & WHM major version ${lts}.";
# get_cpanel_version must be called before
# bootstrap_cpanel_perl
my $bootstrap_cpanel_perl_pid;
if ( $bootstrap_cpanel_perl_pid = fork() ) {
# parent
}
else {
# bootstrap cPanel Perl if available - legacy version of WHM would not have/need it
# this would allow updatenow to run using cpanel perl instead of system perl
$collect_output = '';
local $@;
eval { bootstrap_cpanel_perl($install_version); };
print $collect_output;
undef $collect_output;
die if $@;
exit(0);
}
do_clock_update();
# Start nscd if its not running since it will imporve
# rpm install time
ssystem("ps -U nscd -h 2>/dev/null || /sbin/service nscd start");
# Place customer provided cpanel.config in place early in case we need to block on any of the settings.
mkdir '/var/cpanel';
chmod 0755, '/var/cpanel';
my $custom_cpanel_config_file = '/root/cpanel_profile/cpanel.config';
if ( -e $custom_cpanel_config_file ) {
INFO("The system is placing the custom cpanel.config file from $custom_cpanel_config_file.");
unlink '/var/cpanel/cpanel.config';
system( '/bin/cp', $custom_cpanel_config_file, '/var/cpanel/cpanel.config' );
}
create_config_files($options);
# Look for conditions that require tier manipulation or require us to block the install.
check_for_install_version_blockers( $distro, $distro_version, $distro_arch, $force );
check_if_we_can_get_to_httpupdate();
# Make sure the OS is relatively clean.
check_no_mysql();
# Check that we're in runlevel 3.
check_runlevel($distro_version);
my $installer_dir = Cwd::getcwd();
# Do this after sanity checks so that we fail before creating the touch
# file.
DEBUG "Parsing command line arguments.";
get_install_type(@args); # Set DNSONLY if need be.
check_license_conflict() unless $skip_license_check; # need dnsonly file to be set
# TODO: Get rid of these files and replace them with /var/cpanel/dnsonly
# Disable services by touching files.
if ( is_dnsonly() ) {
my @dnsonlydisable = qw( cpdavd );
foreach my $dis_service (@dnsonlydisable) {
ssystem( 'touch', '/etc/' . $dis_service . 'disable' );
}
}
# Set selinux to permissive mode for installation.
if ( -e '/usr/sbin/setenforce' ) {
ssystem( '/usr/sbin/setenforce', '0', { ignore_errors => 1 } );
}
# Remove rpms and stop unneeded services, we have to do this
# before any adds as once we remove rpms the rpm db will change out
# from under yum
disable_software();
# Start background rpm download only after disable_software
# since it does rpm -e
my $background_rpm_download_pid = background_download_packages_used_during_initial_install();
# Now software is installed, call rdate in case it couldn't be called earlier in the bootstrap script.
update_system_clock();
create_feature_showcase_dir();
create_slash_scripts_symlink();
{
local $?;
waitpid( $bootstrap_cpanel_perl_pid, 0 );
if ( $? != 0 ) {
kill 'TERM', $background_rpm_download_pid if $background_rpm_download_pid;
die "Bootstrapping cPanel Perl failed: $?";
}
}
# Install cpanel files and directories. TERMINATE if failure.
updatenow(
'skipapache' => $skip_apache ? 1 : 0,
'skipreposetup' => $skip_repo_setup ? 1 : 0
);
# We used to wait for yum to finish here but
# that just blocked the installer from downloading
# rpms so we do the waitpid after
chmod( 0700, '/usr/local/cpanel/scripts/cpanel_initial_install' );
system( '/usr/local/cpanel/scripts/cpanel_initial_install', '--skipapache', $skip_apache, '--skipreposetup', $skip_repo_setup, '--installstart', $installstart );
if ( $? >> 8 != 0 ) {
kill 'TERM', $background_rpm_download_pid if $background_rpm_download_pid;
FATAL('The system failed to run the /usr/local/cpanel/scripts/cpanel_initial_install script.');
return 1;
}
# Cleanup before exiting
waitpid( $background_rpm_download_pid, 0 );
return 0;
}
sub recommend_version {
my ( $distro, $version, $force ) = @_;
return unless $version && $version < 7;
my $timer = 5;
my $days_until_eol = days_until_c6_eol();
my $notice =
$force
? qq{ Installation will begin in $timer seconds.}
: qq{ To force the installation on @{[_distro_name($distro)]} version 6, use the --force option.};
my $advice = <<"END";
On November 30, 2020 @{[_distro_name($distro)]} will stop supporting @{[_distro_name($distro)]} 6 on all systems, including this one. To avoid migrating to a new system at that time, we strongly recommend that you use @{[_distro_name($distro)]} version 7. More information about cPanel, L.L.C. deprecation plan will be forthcoming.
If you do need to use @{[_distro_name($distro)]} 6, anticipate the need to have completed your migration in $days_until_eol days.
$notice
END
return print_warning_notice( $advice, $force );
}
sub days_until_c6_eol {
my $c6_eol_epoch = 1606780799; # 2020-11-30 23:59:59
my $day_in_seconds = 86400;
my $current_day = time();
my $days_until_eol = int( ( $c6_eol_epoch - $current_day ) / $day_in_seconds );
return $days_until_eol;
}
sub create_config_files {
my ($options) = @_;
touch('/var/cpanel/nocloudlinux') if $options->{'skip-cloudlinux'};
return;
}
sub print_warning_notice {
my ( $advice, $force ) = @_;
FATAL $advice unless $force;
do { WARN($_) }
for split /\n/, $advice;
five_second_pause();
print "\n";
return;
}
sub yum_nohang_ssystem {
my @cmd = @_;
$yumcheck = 1;
my $failcount = 0;
my $result = 1;
while ($result) { # While yum is failing.
$result = ssystem(@cmd);
last if ( !$result ); # yum came back clean. Stop re-trying
$failcount++;
if ( $failcount > 5 ) {
FATAL "yum failed $failcount times. The installation process cannot continue.";
}
}
$yumcheck = 0;
return;
}
sub ssystem {
my @cmd = @_;
my $conf_hr = ref( $cmd[-1] ) eq 'HASH' ? pop(@cmd) : {};
local $message_caller_depth = $message_caller_depth + 1; # Set caller depth deeper during this sub so debugging it clearer.
DEBUG '- ssystem [BEGIN]: ' . join( ' ', @cmd );
open( my $rnull, '<', '/dev/null' ) or die "Can't open /dev/null: $!";
my $io = IO::Handle->new;
my $pid = IPC::Open3::open3( $rnull, $io, $io, @cmd );
$io->blocking(0);
my $select = IO::Select->new($io);
my $exit_status;
my $buffer = '';
my $buffered_waiting_count = 0;
while ( !defined $exit_status ) {
while ( my $line = readline($io) ) {
# Push the buffer lacking a newline onto the front of this.
if ($buffer) {
$line = $buffer . $line;
$buffer = '';
}
$line =~ s/\r//msg; # Strip ^M from output for better log output.
if ( $yumcheck && $line =~ /yum might be hung/ ) {
kill 15, $pid;
sleep 2;
WARN "Yum appears to be hung. The system will now attempt to restart it.";
ssystem(qw/killall -TERM yum/);
sleep(20);
ssystem(qw/killall -TERM yum/);
}
# Internally buffer on newlines.
if ( $line =~ m/\n$/ms ) {
DEBUG( " " . $line );
$buffered_waiting_count = 0;
}
else {
print "." if ( $buffered_waiting_count++ > 1 );
$buffer = $line;
}
}
# Parse exit status or yield time to the CPU.
if ( waitpid( $pid, 1 ) == $pid ) {
$exit_status = $? >> 8;
}
else {
# Watch the file handle for output.
$select->can_read(0.01);
}
}
ERROR " - ssystem [EXIT_CODE] '$cmd[0]' exited with $exit_status (ignored)" if $exit_status && !$conf_hr->{'ignore_errors'};
close($rnull);
$io->close();
DEBUG '- ssystem [END]';
return $exit_status;
}
sub is_dnsonly {
return -e '/var/cpanel/dnsonly' ? 1 : 0;
}
sub get_install_type {
my @args = @_;
# TYPE could be DNSONLY
my $type = 'standard';
if (@args) {
foreach my $val (@args) {
next if $val =~ m/^--/;
$type = $val;
last;
}
}
if ( $type =~ m/dnsonly/i ) {
INFO "cPanel DNSONLY installation requested.";
touch('/var/cpanel/dnsonly');
}
INFO "Install type: $type\n";
return;
}
sub touch {
my ( $file, @data ) = @_;
open( my $fh, ">>", $file ) or return;
foreach my $line (@data) { # concat anything found.
print {$fh} $line;
}
close $fh;
return;
}
sub get_distro_release_rpm {
# /etc/redhat-release or /etc/system-release must be present
my ( $rhel_release, $amazon_release ) = ( '/etc/redhat-release', '/etc/system-release' );
my $distro_release;
if ( -e $rhel_release ) {
$distro_release = $rhel_release;
}
elsif ( -e $amazon_release ) {
$distro_release = $amazon_release;
}
else {
invalid_system("The system could not detect a valid release file for this distribution");
}
chomp( my $release_rpm = `rpm -qf $distro_release` );
return $release_rpm;
}
sub check_system_support {
# Some of these variables are unused *as of now*. However! some of these values may be useful for 'filling in the blanks' when the RPM check we do fails to provide all required info.
# For now, only the $system and $machine variables are used, $machine only when Amazon Linux is detected. See https://metacpan.org/pod/POSIX#uname for more info.
my ( $system, $nodename, $release, $version, $machine ) = POSIX::uname();
if ( $system =~ m/linux/i ) {
my $release_rpm = get_distro_release_rpm();
$release_rpm or invalid_system("RPMs do not manage release file.");
# We now parse this with our rpm pasrsing code
# to ensure its reliable
my $parsed = parse_rpm_arch($release_rpm);
my $distro_arch = $parsed->{'arch'};
my $distro_version = $parsed->{'version'};
my $distro_type = $parsed->{'name'};
# CentOS uses a hyphen to delimit major/minor.
$distro_version =~ tr{-}{.};
if ( index( $distro_version, '.' ) == -1 ) {
my ($minor_version) = $parsed->{'release'} =~ m{^([0-9]+)\.};
if ($minor_version) {
$distro_version .= qq{.$minor_version};
}
}
DEBUG("Detected distro “$distro_type”, version “$distro_version”, arch “$distro_arch”");
$distro_version or invalid_system("The system found that the unexpected '$release_rpm' RPM manages the release file.");
# This is required for CloudLinux 5 as they do not set an arch for their rpm. So we want to ignore it.
$distro_arch ||= '';
# That RPM must have redhat or centos in the name.
$distro_type =~ m/centos|redhat|enterprise-release|system-release|cloud/i or invalid_system("The system found that the unexpected '$distro_type' RPM manages the release file.");
$distro_type =~ s/-release//imsg;
my $distro;
if ( $distro_type eq 'enterprise' ) {
$distro = 'redhat';
}
elsif ( $distro_type eq 'system' ) {
$distro = 'amazon';
$distro_arch = $machine if $distro_arch eq 'noarch'; # SEE CPANEL-8050
}
else {
$distro = $distro_type;
}
INFO _distro_name($distro) . " $distro_version (Linux) detected!";
# Handle redhat/centos versioning
if ( $distro ne 'amazon' ) {
# The version number must be 6 or 7.
( int($distro_version) <= 7 && $distro_version >= 6 ) or invalid_system( "cPanel, L.L.C. does not support " . _distro_name($distro) . " version $distro_version." );
# Supported distros for installer: redhat/red hat enterprise/cloud/centos/amazon
$distro = ( $distro =~ m/redhat|hat enterprise/i ) ? 'redhat' : ( $distro =~ m/cloud/i ) ? 'cloud' : 'centos';
}
else {
# Support for Amazon Linux introduced in 2015
( $distro_version >= 2015 ) or invalid_system( "cPanel, L.L.C. does not support " . _distro_name($distro) . " version $distro_version for new installations." );
}
INFO "Checking RAM now...";
my $total_memory = _get_total_memory();
my $min_memory_rules = {
default => 768, # CentOS 5/6 => in a better world should be 512
7 => 1_024, # CentOS 7
};
my $minmemory = $min_memory_rules->{$distro_version} || $min_memory_rules->{'default'};
if ( $total_memory < $minmemory ) {
ERROR qq{cPanel, L.L.C. requires a minimum of $minmemory MB of RAM for your operating system.};
FATAL "Increase the server's total amount of RAM, and then reinstall cPanel & WHM.";
}
return ( $distro, $distro_version, $distro_arch );
}
else {
invalid_system("Could not detect version for operating system");
}
invalid_system("Unknown or unsupported operating system: $system");
return;
}
sub _get_total_memory {
# tests on different architectures show that 15 % is safe
my $tolerance_factor = 1.15;
# MemTotal: Total usable ram (i.e. physical ram minus a few reserved
# bits and the kernel binary code)
# note, another option would be to use "dmidecode --type 17", or dmesg
# but this will require an additional RPM
# we just want to be sure that a customer does not install
# with 512 when 700 or more is required
my $meminfo = q{/proc/meminfo};
if ( open( my $fh, "<", $meminfo ) ) {
while ( my $line = readline $fh ) {
if ( $line =~ m{^MemTotal:\s+([0-9]+)\s*kB}i ) {
return int( int( $1 / 1_024 ) * $tolerance_factor );
}
}
}
return 0; # something is wrong
}
sub invalid_system {
my $message = shift || '';
chomp $message;
ERROR "$message";
ERROR "The system detected an unsupported distribution. cPanel & WHM only supports CentOS 6 and 7, Red Hat Enterprise Linux® 6 and 7, and CloudLinux™ 6 and 7.";
FATAL "Please reinstall cPanel & WHM from a valid distribution.";
return;
}
sub check_hostname {
my $hostname = get_fqdn_hostname();
INFO "Validating that the system hostname ('$hostname') is a FQDN...";
if ( $hostname =~ /^www\./ ) {
FATAL "The installation process detected the following hostname: $hostname\n Hostnames cannot start with www! Use a valid hostname.";
}
if ( !is_valid_hostname($hostname) ) {
ERROR "";
ERROR "********************* ERROR *********************";
ERROR "";
ERROR "Your hostname ($hostname) is invalid, and must be";
ERROR "set to a fully qualified domain name before installing cPanel.";
ERROR "";
ERROR "A fully qualified domain name must contain two dots, and consists of two parts: the hostname and the domain name.";
ERROR "You can update your hostname by running `hostname your-hostname.example.com`, then re-running the installer.";
ERROR "********************* ERROR *********************";
FATAL "Exiting...";
}
return;
}
sub check_network_manager() {
my ($release_version) = @_;
INFO "Checking for NetworkManager now...";
if ( $release_version eq 6 ) {
check_initd_network_manager();
return;
}
check_systemd_network_manager();
return;
}
sub check_files {
INFO "Checking for essential system files...";
unless ( -f '/etc/fstab' ) {
ERROR "Your system is missing the file /etc/fstab. This is an";
ERROR "essential system file that is part of the base system.";
FATAL "Please ensure the system has been properly installed.";
}
return;
}
sub network_manager_report_status {
my ( $uninstalled, $running, $startup ) = @_;
if ($uninstalled) {
INFO "NetworkManager is not installed.";
}
elsif ( $running || $startup ) {
ERROR "********************* ERROR *********************";
ERROR "NetworkManager is installed and running, or ";
ERROR "configured to startup. ";
ERROR "";
ERROR "cPanel does not support NetworkManager enabled ";
ERROR "systems. The installation cannot proceed. ";
ERROR "";
ERROR "See https://go.cpanel.net/disablenm for more ";
ERROR "information on disabling Network Manager. ";
ERROR "********************* ERROR *********************";
($force) ? WARN "Continuing installation due to force flag..." : FATAL "Exiting...";
}
else {
WARN "NetworkManager is installed, but not active. Consider removing it.";
}
return;
}
sub check_initd_network_manager {
my $status = `service NetworkManager status 2>/dev/null`;
my $uninstalled = !$status;
my $running;
my $startup;
if ($status) {
my ( $status_service, $verb, $status_state ) = split( ' ', $status );
$running = $status_state ne 'stopped';
}
my $config = `chkconfig NetworkManager --list 2>/dev/null`;
if ($config) {
my ( $config_service, $config_runlevels ) = split( ' ', $config, 2 );
$startup = $config_runlevels =~ m/:on/;
}
network_manager_report_status( $uninstalled, $running, $startup );
return;
}
sub check_systemd_network_manager {
my $status = `systemctl --all --no-legend --no-pager list-units NetworkManager.service 2>/dev/null`;
my $uninstalled = !$status;
my $running;
my $startup;
if ($status) {
my ( $status_service, $load_state, $active_state, $sub_state, @service_description ) = split( ' ', $status );
$running = $active_state && $sub_state && $active_state ne 'inactive' && $sub_state ne 'dead';
# they uninstalled it, but didn't run systemctl daemon-reload
if ( $load_state eq 'not-found' ) {
$uninstalled = 1;
}
}
my $config = `systemctl --all --no-legend --no-pager list-unit-files NetworkManager.service 2>/dev/null`;
if ($config) {
my ( $config_service, $enabled_state ) = split( ' ', $config );
$startup = $enabled_state && $enabled_state ne 'disabled' && $enabled_state ne 'masked';
}
network_manager_report_status( $uninstalled, $running, $startup );
return;
}
sub five_second_pause {
for ( 1 .. 5 ) { print '.'; sleep(1); }
print "\n";
return;
}
sub warn_clean_server_needed {
INFO "cPanel Layer 1 Installer Starting...";
INFO "Warning !!! Warning !!! WARNING !!! Warning !!! Warning";
INFO "-------------------------------------------------------";
INFO "cPanel requires a fresh, clean server!";
INFO "If you serve websites from this server, this installer";
INFO "will overwrite all of your configuration files.";
INFO "Hit Ctrl+C NOW!";
INFO "If this is a new server, please ignore this message.";
INFO "-------------------------------------------------------";
INFO "Warning !!! Warning !!! WARNING !!! Warning !!! Warning";
INFO "Waiting 5 seconds...";
INFO "";
INFO "";
five_second_pause();
return;
}
sub clean_install_check {
INFO 'Checking for any control panels...';
my @server_detected;
push @server_detected, 'DirectAdmin' if ( -e '/usr/local/directadmin' );
push @server_detected, 'Plesk' if ( -e '/etc/psa' );
push @server_detected, 'Ensim' if ( -e '/etc/appliance' || -d '/etc/virtualhosting' );
#push @server_detected, 'Alabanza' if ( -e '/etc/mail/mailertable' );
push @server_detected, 'Zervex' if ( -e '/var/db/dsm' );
push @server_detected, 'Web Server Director' if ( -e '/bin/rpm' && `/bin/rpm -q ServerDirector` =~ /^ServerDirector/ms );
# Don't just check for /usr/local/cpanel, as some people will have created
# that directory as a mount point for the install.
push @server_detected, 'cPanel & WHM' if -e '/usr/local/cpanel/cpkeyclt';
return if ( !@server_detected );
ERROR "The installation process found evidence that the following control panels were installed on this server:";
ERROR $_ foreach (@server_detected);
FATAL 'You must install cPanel & WHM on a clean server.';
return;
}
sub check_no_mysql {
# This can cause failures if the database is newer than the version we're
# going to install.
INFO 'Checking for an existing MySQL or MariaDB instance...';
my $mysql_dir = '/var/lib/mysql';
return unless -d $mysql_dir;
my $nitems = 0;
if ( opendir( my $dh, $mysql_dir ) ) {
$nitems = scalar grep { !/\A(?:\.{1,2}|lost\+found)\z/ } readdir $dh;
closedir($dh);
}
return unless $nitems;
ERROR "The installation process found evidence that MySQL or MariaDB was installed on this server:";
ERROR "The $mysql_dir directory is present and not completely empty.";
FATAL 'You must install cPanel & WHM on a clean server.';
return;
}
sub check_runlevel {
my ($distro_version) = @_;
if ( $distro_version && $distro_version >= 7 ) {
# simply check for multi-user.target on CentOS 7
# system state and their equivalent runlevel targets
# graphical.target <=> runlevel5.target
# multi-user.target <=> runlevel2.target, runlevel3.target, runlevel4.target
# poweroff.target <=> runlevel0.target
# reboot.target <=> runlevel6.target
# rescue.target <=> runlevel1.target
`systemctl is-active multi-user.target >/dev/null 2>&1`;
return if $? == 0;
if ($force) {
WARN 'The installation process detected that the multi-user.target is not active (boot is probably not finished).';
WARN 'The multi-user.target must be active. Proceeding anyway because --force was specified!';
}
else {
ERROR 'The installation process detected that the multi-user.target is not active (boot is probably not finished).';
FATAL 'The multi-user.target must be active before the installation can continue.';
}
}
my $runlevel = `runlevel`;
chomp $runlevel;
my ( $prev, $curr ) = split /\s+/, $runlevel;
my $message;
# runlevel can also return unknown
if ( !defined $curr ) { $message = "The installation process could not determine the server's current runlevel."; }
elsif ( $curr != 3 ) { $message = "The installation process detected that the server was in runlevel $curr."; }
else { return; }
# the system claims to be in an unsupported runlevel.
if ($force) {
WARN $message;
WARN 'The server must be in runlevel 3. Proceeding anyway because --force was specified!';
return;
}
else {
ERROR "The installation process detected that the server was in runlevel $curr.";
FATAL 'The server must be in runlevel 3 before the installation can continue.';
}
FATAL 'Runlevel logic failed. This should never happen. The installer cannot continue.';
return;
}
sub open_logs {
my $installstart = time();
if ( my $mtime = ( stat($log_file) )[9] ) {
my $bu_file = $log_file . '.' . $mtime;
system( '/bin/cp', $log_file, $bu_file ) unless -e $bu_file;
}
my $orig_umask = umask(0077);
open( $log_fh, '>>', $log_file ) or die "Could not open log: $!";
$log_fh->autoflush(1);
umask($orig_umask);
my $installstarttime = localtime($installstart);
INFO "cPanel & WHM installation started at: ${installstarttime}!";
INFO "This installation will require 10-50 minutes, depending on your hardware and network.";
INFO "Now is the time to go get another cup of coffee/jolt.";
INFO "The install will log to the /var/log/cpanel-install.log file.";
INFO "";
INFO "Beginning Installation v3...";
return $installstart;
}
# Install fastest mirror plugin for CentOS
sub install_fastest_mirror {
my ( $distro, $distro_version ) = @_;
return unless $distro =~ m/centos/;
return if has_yum_plugin_fastestmirror();
INFO "Installing the fastest mirror plugin...";
ssystem( 'yum', 'clean', 'plugins' );
ssystem( 'yum', '-y', 'install', 'yum-fastestmirror' );
ssystem( 'yum', 'clean', 'plugins' );
# We set the number of threads in bootstrap
#
#
# We used to support 512MB of ram which caused a problem with a high
# maxthreads (FB-51412), however this is no longer an issue
# https://documentation.cpanel.net/display/78Docs/Installation+Guide+-+System+Requirements
#
return;
}
# This is a peared down version of ensure_rpms_installed because we don't yet have cpanel code.
# We also assume centhat 5/6/7 for this code.
sub ensure_rpms_installed {
my ( $distro, $distro_version ) = @_;
# Disable rpmforge repos
if ( glob '/etc/yum.repos.d/*rpmforge*' ) {
WARN 'DISABLING rpmforge yum repositories.';
mkdir( '/etc/yum.repos.d.disabled', 0755 );
ssystem('mv -fv -- /etc/yum.repos.d/*rpmforge* /etc/yum.repos.d.disabled/ 2>/dev/null');
}
install_fastest_mirror( $distro, $distro_version );
# Minimal packages needed to use yum.
INFO("Installing packages needed to download and run the cPanel initial install.");
# Assure wget/bzip2/gpg are installed for centhat. These packages are needed prior to sysup
my @packages_to_install = qw/wget bzip2 gnupg2 rdate xz yum yum-fastestmirror nscd/;
# Install perl-devel on Redhat installs
if ( $distro_version < 2015 ) {
push @packages_to_install, qw{ crontabs sysstat };
# No need to install perl-CPAN on older versions as install_locallib_loginprofile will
# do it for us later
}
# Remove all excludes from /etc/yum.conf
ssystem( '/usr/local/cpanel/scripts/checkyum', '--nokernel', '--noperl' ) if ( -e '/usr/local/cpanel/scripts/checkyum' );
ssystem( 'touch', '/etc/checkyumdisable' ); # Disable checkyum
# Don't attempt to install kernel-headers on systems with the CentOS Plus kernel headers already installed.
# We do not need kernel-headers for v70+ since we don't link anything against the kernel anymore
# if ( !has_kernel_plus_headers() ) {
# push @packages_to_install, 'kernel-headers'; # Needed because Cpanel::SysPkgs excludes kernel_version
#}
if (@packages_to_install) {
yum_nohang_ssystem( '/usr/bin/yum', '-y', 'install', @packages_to_install );
}
# Make sure all rpms are up to date if we are running
# an older version that CentOS 7 since we only support
# Centos 6.5+.
#
# Additionally we need Centos 7.4+ to ensure they
# have the latest version of openssl per
# CPANEL-25853
if ( version_lt( $distro_version, 6.5 ) || ( version_gte( $distro_version, 7 ) && version_lt( $distro_version, 7.4 ) ) ) {
yum_nohang_ssystem( '/usr/bin/yum', '-y', 'update' );
}
# Reinstate yum exclusions
unlink '/etc/checkyumdisable';
ssystem('/usr/local/cpanel/scripts/checkyum') if ( -e '/usr/local/cpanel/scripts/checkyum' );
return;
}
sub disable_software {
my @remove_rpms = qw(
exim
mysql
MySQL
mysql-max
MySQL-Max
mysql-devel
MySQL-devel
mysql-client
MySQL-client
mysql-ndb-storage
MySQL-ndb-storage
mysql-ndb-management
MySQL-ndb-management
mysql-ndb-tools
MySQL-ndb-tools
mysql-ndb-extra
MySQL-ndb-extra
mysql-shared
MySQL-shared
mysql-libs
MySQL-libs
mysql-bench
MySQL-bench
mysql-server
MySQL-server
wu-ftpd
portreserve
postfix
sendmail
smail
spamassassin
apache-conf
mod_perl
mariadb-libs
MariaDB-client
MariaDB-common
MariaDB-server
MariaDB-compat
MariaDB-shared
);
INFO 'Ensuring that prelink is disabled...';
my $prelink_conf = '/etc/sysconfig/prelink';
if ( open( my $fh, '+<', '/etc/sysconfig/prelink' ) ) {
my @lines = map { my $s = $_; $s =~ s/^(PRELINKING=)yes(.*)$/$1no$2/; $s } <$fh>;
seek( $fh, 0, 0 );
print {$fh} @lines;
truncate( $fh, tell($fh) );
}
INFO 'Ensuring that conflicting services are not installed...';
my @rpms_to_remove =
map { ( split( m{-}, $_, 2 ) )[1] } # split INSTALLED-NAME and take NAME
grep { rindex( $_, 'INSTALLED-', 0 ) == 0 } # Only output that starts with INSTALLED- is installed
split( m{\n}, `rpm -q --nodigest --nosignature --queryformat 'INSTALLED-%{NAME}\n' @remove_rpms` );
if (@rpms_to_remove) {
DEBUG " Removing @rpms_to_remove...";
ssystem( 'rpm', '-e', '--nodeps', @rpms_to_remove, { ignore_errors => 1 } );
}
INFO 'Removing conflicting service references from the RPM database (but leaving the services installed)...';
my @all_pkgs = `rpm -qa --nodigest --nosignature --queryformat '%{name}\n'`;
@all_pkgs = grep { $_ !~ m/^cpanel-/ } @all_pkgs; # Don't worry about cpanel RPMS.
return if ($skip_apache);
# TODO: Why are we doing --justdb??? Fix this after at least 11.30
foreach my $rpm ( grep m/http|php|apache|mod_perl/, @all_pkgs ) {
chomp $rpm;
DEBUG " Removing $rpm...\n";
ssystem( 'rpm', '-e', '--justdb', '--nodeps', $rpm, { ignore_errors => 1 } );
}
return;
}
sub create_slash_scripts_symlink {
# Install cPanel files.
INFO 'Installing /usr/local/cpanel files...';
DEBUG "HTTPUPDATE is set to " . get_update_source();
if ( -e '/scripts' && !-l '/scripts' ) {
if ( !-d '/scripts' ) {
WARN "The system detected /scripts as a file. Moving it to a new location...";
ssystem( qw{/bin/mv /scripts}, "/scripts.o.$$" );
}
else {
WARN "The system detected the /scripts directory. Moving its contents to the /usr/local/cpanel/scripts directory...";
ssystem(qw{mkdir -p /usr/local/cpanel/scripts});
ssystem('cd / && tar -cf - scripts | (cd /usr/local/cpanel && tar -xvf -)');
ssystem(qw{/bin/rm -rf /scripts});
}
}
unlink qw{/scripts};
symlink(qw{/usr/local/cpanel/scripts /scripts}) unless -e '/scripts';
if ( !-l '/scripts' ) {
WARN("The /scripts directory must be a symlink to the /usr/local/cpanel/scripts directory. cPanel & WHM does not use the /scripts directory.");
}
else {
DEBUG('/scripts symlink is set to point to /usr/local/cpanel/scripts');
}
return;
}
sub bootstrap_cpanel_perl {
my ($install_version) = @_;
# Force $install_version to be passed so we know the TIERS
# file has already been downloaded
die "bootstrap_cpanel_perl requires the \$install_version" if !$install_version;
# Install cPanel files.
INFO "Installing bootstrap cPanel Perl";
# Download the tar.gz files and extract them instead.
my $script = 'fix-cpanel-perl';
my $source = "/cpanelsync/$install_version/cpanel/scripts/${script}.xz";
unlink $script;
DEBUG "Retrieving the $script file from $source if available...";
# download file in current directory (inside the self extracted tarball)
cpfetch( $source, is_optional => 1 );
if ( !-e $script ) {
WARN "Script '$script' is not available for cPanel & WHM version $install_version. Continuing installation...";
return;
}
chmod 0700, $script;
INFO "Running script $script to bootstrap cPanel Perl.";
my $exit;
# Retry a few times if one of the http request failed
my $max = 3;
foreach my $iter ( 1 .. $max ) {
$exit = system("./$script");
if ( $exit == 0 ) {
INFO "Successfully installed cPanel Perl minimal version.";
return;
}
WARN "Run #$iter/$max failed to run script $script.";
last if $iter == $max;
sleep 5;
}
my $signal = $exit % 256;
$exit = $exit >> 8;
FATAL "Failed to run script $script to bootstrap cPanel Perl.";
FATAL("The script $script terminated with the following exit code: $exit ($signal); The cPanel & WHM installation process cannot proceed.");
return;
}
sub updatenow {
my (%flags) = @_;
INFO "Downloading updatenow.static";
# Download the tar.gz files and extract them instead.
my $install_version = get_cpanel_version();
my $source = "/cpanelsync/$install_version/cpanel/scripts/updatenow.static.bz2";
DEBUG "Retrieving the updatenow.static file from $source...";
# download file in current directory (inside the self extracted tarball)
unlink 'updatenow.static';
cpfetch($source);
chmod 0755, 'updatenow.static';
my $exit;
my @passed_flags = map { ( "--$_" => $flags{$_} ) } sort keys %flags;
for ( 1 .. 5 ) { # Re-try updatenow if it fails.
INFO("Closing the installation log and passing output control to the updatenow.static file...");
# close $log_fh so it can be re-opened by updatenow.
close $log_fh;
$exit = system( './updatenow.static', '--upcp', '--force', "--log=$log_file", @passed_flags );
# Re-open the log regardless of success.
my $log_file = '/var/log/cpanel-install.log';
open( $log_fh, '>>', $log_file ) or die "Can't open log file: $!";
$log_fh->autoflush(1);
return if ( !$exit );
DEBUG("The installation process detected a failed synchronization. The system will reattempt the synchronization with the updatenow.static file...");
}
my $signal = $exit % 256;
$exit = $exit >> 8;
FATAL("The installation process was unable to synchronize cPanel & WHM. Verify that your network can connect to httpupdate.cpanel.net and rerun the installer.");
FATAL("The updatenow.static process terminated with the following exit code: $exit ($signal); The cPanel & WHM installation process cannot proceed.");
return;
}
# Remote resolvers are required, since we remove local BIND during installation.
sub check_remote_resolvers {
open my $resolv_conf_fh, '<', '/etc/resolv.conf' or FATAL("Could not open /etc/resolv.conf: $!");
if ( !grep { m/^\s*nameserver\s+/ && !m/\s+127.0.0.1$/ } <$resolv_conf_fh> ) {
FATAL("/etc/resolv.conf must be configured with non-local resolvers for installations to complete.");
}
return;
}
sub check_resolv_conf {
check_remote_resolvers();
INFO "Validating whether the system can look up domains...";
my @domains = qw(
httpupdate.cpanel.net
securedownloads.cpanel.net
);
foreach my $domain (@domains) {
DEBUG "Testing $domain...";
next if ( gethostbyname($domain) );
ERROR '!' x 105 . "\n";
ERROR "The system cannot resolve the $domain domain. Check the /etc/resolv.conf file. The system has terminated the installation process.\n";
FATAL '!' x 105 . "\n";
}
return;
}
sub read_config {
my $file = shift or die;
my $config = {};
open( my $fh, "<", $file ) or return $config;
while ( my $line = readline $fh ) {
chomp $line;
if ( $line =~ m/^\s*([^=]+?)\s*$/ ) {
my $key = $1 or next; # Skip loading the key if it's undef or 0
$config->{$key} = undef;
}
elsif ( $line =~ m/^\s*([^=]+?)\s*=\s*(.*?)\s*$/ ) {
my $key = $1 or next; # Skip loading the key if it's undef or 0
$config->{$key} = $2;
}
}
return $config;
}
sub check_if_we_can_get_to_httpupdate {
return if ( $wget_bin !~ m/wget/ ); # Just skip this check if no wget is avail.
foreach my $src ( 'index.html', 'modules/index.html' ) {
my $page = `$wget_bin $wget_args - http://httpupdate.cpanel.net/pub/CPAN/$src`;
if ( $page =~ m/perl/i && $page =~ m/CPAN/ ) {
INFO "The system successfully connected to the httpupdate.cpanel.net server.";
return;
}
}
FATAL "The system cannot currently download from the httpupdate.cpanel.net servers.";
return;
}
# A tiny version of Cpanel::RpmUtils::checkupdatesystem();
sub check_yum_works {
local $ENV{'LC_ALL'} = 'C';
my $out = `yum info glibc 2>&1`;
return if ( $out =~ m{ (?: Installed | Available) \s+ Packages }xmsi );
ERROR q{Your operating system's RPM update method } . qq{(yum) could not locate the glibc package. } . q{This is an indication of an improper setup. } . q{You must correct this error before you proceed. };
FATAL "\n\n";
return;
}
sub cpfetch {
my ( $url, %opts ) = @_;
if ( !$url ) {
FATAL("The system called the cpfetch process without a URL.");
}
my $file = _get_file( $url, %opts );
return unless defined $file;
if ( $file =~ /\.bz2$/ ) {
ssystem( "/usr/bin/bunzip2", $file );
}
if ( signatures_enabled() ) {
$url =~ s/\.bz2$//g;
$file =~ s/\.bz2$//g;
my $sig = _get_file("$url.asc");
_verify_file( $file, $sig, $url );
}
# the xz file itself is signed only extract it after checking the signature
if ( $file =~ /\.xz$/ ) {
ssystem( "/usr/bin/unxz", $file );
}
return;
}
sub _get_file {
my ( $url, %opts ) = @_;
$url = 'http://' . get_update_source() . $url;
my @FILE = split( /\//, $url );
my $file = pop(@FILE);
if ( -e $file ) {
WARN("Warning: Overwriting the $file file...");
unlink $file;
FATAL("The system could not remove the $file file.") if ( -e $file );
}
DEBUG "Retrieving $url to the $file file...";
my $out = `$wget_bin $wget_args '$file' $url 2>&1`;
if ( !-e $file || -z $file ) {
unlink $file;
if ( $opts{is_optional} ) {
WARN "The system could not fetch the optional $file file: $out";
return;
}
FATAL "The system could not fetch the $file file: $out";
}
return $file;
}
sub get_update_source {
my $update_source = 'httpupdate.cpanel.net';
my $source_file = '/etc/cpsources.conf';
if ( -r $source_file && -s $source_file ) { # pull in from cpsources.conf if it's set.
open( my $fh, "<", $source_file ) or return $update_source;
while (<$fh>) {
next if ( $_ !~ m/^\s*HTTPUPDATE\s*=\s*(\S+)/ );
$update_source = "$1";
FATAL("HTTPUPDATE is set to '$update_source' in the $source_file file.") if ( !$update_source );
last;
}
}
return $update_source;
}
sub get_myip_url {
my $source_file = '/etc/cpsources.conf';
my $myip_url = $DEFAULT_MYIP_URL;
if ( -r $source_file && -s $source_file ) { # pull in from cpsources.conf if it's set.
open( my $fh, "<", $source_file ) or return $myip_url;
while (<$fh>) {
next unless m/^\s*MYIP\s*=\s*(\S+)/;
$myip_url = "$1";
last;
}
}
DEBUG "Using MyIp URL to detect your IP '$myip_url'.";
return $myip_url;
}
sub guess_ip {
my $url = get_myip_url();
FATAL "No wget binary defined at this stage." unless $wget_bin;
my $file = q[guess.my.ip];
my $max = 3;
foreach my $iter ( 1 .. $max ) {
unlink $file;
`$wget_bin $wget_args '$file' $url 2>&1`;
last if $? == 0;
if ( $iter == $max ) {
FATAL "Failed to call URL $url to detect your IP.";
}
WARN("Call to $url fails, giving it another try [$iter/$max]");
sleep 3;
}
my $ip;
{
open( my $fh, '<', $file ) or FATAL("Cannot read file $file.");
$ip = readline($fh);
close($fh);
}
chomp($ip) if defined $ip;
if ( !defined $ip || !length $ip ) {
# could also use FATAL - be relax for now to avoid false positives
WARN "Fail to guess your IP using URL $url.";
return;
}
# sanitize the IP - Ipv4 or Ipv6 character set only
if ( $ip !~ qr{^[0-9a-f\.:]+$}i ) {
# could also use FATAL - be relax for now to avoid false positives
WARN "Invalid IP address '$ip' returned by $url";
return;
}
return $ip;
}
sub verify_url {
my ($ip) = @_;
$ip ||= '';
return qq[https://verify.cpanel.net/xml/verifyfeed?ip=$ip];
}
#
# block cPanel&WHM install when a DNSONLY license is valid for the server
# block DNSONLY license when a cPanel license is valid for the server
#
sub check_license_conflict {
my $ip = guess_ip();
# skip check and continue install if we cannot guess up
return unless defined $ip;
INFO "Checking for existing active license linked to IP '$ip'.";
my $verify_license_xml = q[verify.license.xml];
my $url = verify_url($ip);
# check verify.cpanel.net - the xml one...
_wget_to_file( $url, $verify_license_xml );
my $active_basepkg = 0;
my $package = "";
{
open( my $fh, '<', $verify_license_xml ) or FATAL("Cannot read file $verify_license_xml.");
while ( my $line = <$fh> ) {
next unless $line =~ m/status="1"/; # package is active
next unless $line =~ m/basepkg="1"/; # package is a base package (skipping packages like kernelcare, cloudlinux & co)
if ( $line =~ m/producttype="([0-9]+)"/ ) {
$active_basepkg = $1;
$line =~ m/package="([^"]+)"/;
$package = $1;
last;
}
}
}
return unless $active_basepkg;
if ( is_dnsonly() ) {
# we cannot install dnsonly if a cPanel license exists
if ( $active_basepkg != 64 ) {
ERROR "Unexpected license type found for your IP: https://verify.cpanel.net/app/verify?ip=$ip";
ERROR "Current active package is $package";
FATAL "Installation aborted. Perhaps you meant to install latest instead of latest-dnsonly? If not please cancel your cPanel license before installing a cPanel DNSONLY server.";
}
}
else {
# we cannot install cPanel if a dnsonly license exists
if ( $active_basepkg & PRODUCT_DNSONLY ) {
ERROR "Unexpected license type found for your IP: https://verify.cpanel.net/app/verify?ip=$ip";
FATAL "Installation aborted. Perhaps you meant to install latest-dnsonly instead of latest? If not please cancel your DNSONLY license before installing a cPanel & WHM server.";
}
}
# everything is fine at this point
return;
}
sub _wget_to_file {
my ( $url, $file ) = @_;
if ( !defined $wget_bin || !defined $wget_args ) { # should be performed earlier but easier for testing
( $wget_bin, $wget_args ) = get_download_tool_binary();
}
my $max = 3;
foreach my $iter ( 1 .. $max ) {
unlink $file;
`$wget_bin $wget_args '$file' $url 2>&1`;
return 1 if $? == 0;
if ( $iter == $max ) {
FATAL "Failed to call URL $url to check your license status.";
}
WARN("Call to URL '$url' fails, giving it another try. [$iter/$max]");
sleep 3;
}
return;
}
sub _MSG {
my $level = shift;
my $msg = shift || '';
chomp $msg;
my ( $sec, $min, $hour, $mday, $mon, $year, $wday, $yday, $isdst ) = localtime;
my ( $package, $filename, $line ) = caller($message_caller_depth);
my $stamp_msg = sprintf( "%04d-%02d-%02d %02d:%02d:%02d %4s [%d] (%5s): %s\n", $year + 1900, $mon + 1, $mday, $hour, $min, $sec, $line, $$, $level, $msg );
print {$log_fh} $stamp_msg;
if ( defined $collect_output ) {
$collect_output .= $stamp_msg;
}
else {
print $stamp_msg;
}
return;
}
# Code previously located in the bootstrap script.
sub bootstrap {
my ( $distro, $distro_version ) = @_;
# Confirm perl version.
if ( $] < 5.008 ) {
print "This installer requires Perl 5.8.0 or better.\n";
die "Cannot continue.\n";
}
validate_rhn_registration( $distro, $distro_version );
validate_cloudlinux_registration( $distro, $distro_version );
( $wget_bin, $wget_args ) = get_download_tool_binary();
$gpg_bin = gpg_bin();
setup_empty_directories($distro);
# Setup yum/up2date touch files.
setup_update_config( $distro, $distro_version );
_fetch_gpg_key_once();
return;
}
sub do_clock_update {
# Sync the clock.
if ( !update_system_clock() ) {
WARN( "The current system time is set to: " . `date` );
WARN("!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!");
WARN("The installation process could not verify the system time. The utility to set time from a remote host, rdate, is not installed.");
WARN("If your system time is incorrect by more than a few hours, source compilations will subtly fail.");
WARN("This issue may result in an overall installation failure.");
WARN("!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!");
}
return;
}
sub setup_empty_directories {
my $distro = shift or die;
# mkdir some directories.
INFO 'The installation process will now set up the necessary empty cpanel directories.';
foreach my $dir (qw{/usr/local/cpanel /usr/local/cpanel/base /usr/local/cpanel/base/frontend /usr/local/cpanel/logs /var/cpanel /var/cpanel/tmp /var/cpanel/version /var/cpanel/perl}) {
unlink $dir if ( -f $dir || -l $dir );
if ( !-d $dir ) {
DEBUG "mkdir $dir";
mkdir( $dir, 0755 );
}
}
foreach my $dir (qw{/var/cpanel/logs}) {
unlink $dir if ( -f $dir || -l $dir );
if ( !-d $dir ) {
DEBUG "mkdir $dir";
mkdir( $dir, 0700 );
}
}
return;
}
sub setup_update_config {
my ( $distro, $distro_version ) = @_;
# legacy files
unlink('/var/cpanel/useup2date');
unlink('/var/cpanel/useyum');
touch('/var/cpanel/yum_rhn') if $distro eq 'redhat';
INFO("The installation process will now ensure that GPG is set up properly before it imports keys.");
system(qw{gpg --list-keys});
INFO("The installation process will now import GPG keys for yum.");
if ( -e '/usr/share/rhn/RPM-GPG-KEY' ) {
system( 'gpg', '--import', '/usr/share/rhn/RPM-GPG-KEY' );
system( 'rpm', '--import', '/usr/share/rhn/RPM-GPG-KEY' );
}
if ( !-e '/etc/yum.conf' && -e '/etc/centos-yum.conf' ) {
INFO("The system will now set up yum from the /etc/centos-yum.conf file.");
system(qw{cp -f /etc/centos-yum.conf /etc/yum.conf});
}
return;
}
sub validate_registration {
my ( $distro, $distro_version, $opts ) = @_;
INFO("Checking the $opts->{'distro_name'} registration for updates...");
local $ENV{'TERM'} = 'dumb';
my $registered = `yum list < /dev/null 2>&1`;
if ( $registered =~ m/not register|Please run rhn_register/ms
&& $registered !~ /is receiving updates/ms ) {
ERROR("When you use $opts->{'full_distro_name'}, you must register ");
ERROR("with the $opts->{'distro_name'} Network before you install cPanel & WHM.");
ERROR("Run the following command to register your server: $opts->{'register_command'} ");
FATAL("The installation process will now terminate...");
}
return;
}
sub validate_cloudlinux_registration {
my ( $distro, $distro_version ) = @_;
# Short here if not CloudLinux.
return if ( $distro ne 'cloud' );
validate_registration(
$distro,
$distro_version,
{
distro_name => _distro_name($distro),
full_distro_name => _distro_name( $distro, 1 ),
register_command => '/usr/sbin/clnreg_ks --force',
}
);
return;
}
sub validate_rhn_registration {
my ( $distro, $distro_version ) = @_;
# Short here if not redhat
return if ( $distro ne 'redhat' );
validate_registration(
$distro,
$distro_version,
{
distro_name => _distro_name($distro),
full_distro_name => _distro_name( $distro, 1 ),
register_command => '/usr/sbin/rhn_register',
}
);
my @channels = `/usr/bin/yum repolist enabled`;
INFO("Validating that the system subscribed to the optional RHN channel...");
# optional channel validated.
return if grep { m/-optional(?:-\d|-rpms|\/7Server)/ } @channels;
my $optional_channel;
foreach my $channel (@channels) {
chomp $channel;
# On RHEL 6, this line looks like this:
# rhel-6-server-rpms Red Hat Enterprise Linux 6 Server (RPMs)
# On RHEL 7, it looks like this:
# rhel-7-server-rpms/7Server/x86_64 Red Hat Enterprise Linux 7 Server (RPMs) 13,357
next if ( $channel !~ /^[!*]?(rhel-([\dxi_]+)-server-(\d+|rpms))[\s\/]+.*$/i );
$channel = $1;
$optional_channel = $channel;
$optional_channel =~ s/-server-6/-server-optional-6/;
$optional_channel =~ s/-server-rpms/-server-optional-rpms/;
}
if ( !$optional_channel ) {
ERROR("The server is not registered with a known Red Hat base channel.");
ERROR('$> /usr/bin/yum repolist enabled');
ERROR(`/usr/bin/yum repolist enabled`);
exit 8;
}
ERROR("cPanel & WHM requires you to subscribe to the RHEL $distro_version optional channel, to get all of the needed packages.");
ERROR("cPanel & WHM will not function without this channel. Check your subscriptions and then rerun the installer.");
ERROR(" ");
ERROR("Please run the following command: /usr/sbin/spacewalk-channel --add --channel=$optional_channel");
ERROR("Or, for newer versions, run the following command: /usr/sbin/subscription-manager attach --auto");
ERROR(" ");
ERROR("You can register to the optional channel at http://rhn.redhat.com.");
FATAL("Terminating...");
return;
}
sub get_download_tool_binary {
for my $bin (qw(/bin/wget /usr/bin/wget /usr/local/bin/wget)) {
next if ( !-e $bin );
next if ( !-x _ );
next if ( -z _ );
return ( $bin, '-q --no-dns-cache --tries=20 --timeout=60 --dns-timeout=60 --read-timeout=30 --waitretry=1 --retry-connrefused -O' ) if ( `$bin --version` =~ m/GNU\s+Wget\s+\d+\.\d+/ims );
}
FATAL "The installation process could not find the wget binary. Install it to a standard location.";
return;
}
sub gpg_bin {
for my $bin (qw(/bin/gpg /usr/bin/gpg /usr/local/bin/gpg)) {
next if ( !-e $bin );
next if ( !-x _ );
next if ( -z _ );
return $bin;
}
FATAL "The installation process could not find the gpg binary. Install it to a standard location.";
return;
}
# This code is somewhat of a duplication of the code for updatenow that blocks updates based on configuration
# settings. It needs to be here also because of the bootstrap level nature for when this needs to run.
sub check_for_install_version_blockers {
my ( $distro, $distro_version, $distro_arch, $force ) = @_;
my $lts_version = get_lts_version();
my $tier = get_cpanel_tier();
$lts_version or FATAL("The system could not determine the target version from your tier: $tier");
if ( $lts_version < 69 ) {
FATAL("You cannot install versions of cPanel & WHM prior to cPanel & WHM version 70.");
}
if ( $distro =~ m/bsd/i ) {
FATAL "cPanel & WHM does not support BSD.";
}
if ( $distro_version < 6 || $distro_arch ne 'x86_64' ) {
FATAL "Starting with version 57, cPanel & WHM supports 64-bit versions of CentOS 6+, Red Hat Enterprise Linux® 6+, and CloudLinux™ 6+ only.";
}
# pull in cpanel.config settings or return if the file's not there (defaults will assert)
return if ( !-e '/var/cpanel/cpanel.config' );
my $cpanel_config = read_config('/var/cpanel/cpanel.config');
if ( defined $cpanel_config->{'mysql-version'} ) {
my $recommended_mysql_version = _get_recommended_mysql_version($lts_version);
my $is_mysql_version_good = $cpanel_config->{'mysql-version'} >= $recommended_mysql_version;
if ( !$is_mysql_version_good ) {
FATAL "You must set MySQL® to version $recommended_mysql_version or higher in the /var/cpanel/cpanel.config file for cPanel & WHM version $lts_version.";
}
}
if ( defined $cpanel_config->{'mailserver'} && $cpanel_config->{'mailserver'} =~ m/^courier$/i ) {
FATAL "You must use 'dovecot' or 'disabled' for the mailserver in the /var/cpanel/cpanel.config file for cPanel & WHM version $lts_version.";
}
return;
}
sub update_system_clock {
my @rdate_bin =
-x '/usr/bin/rdate' ? ( '/usr/bin/rdate', '-s', 'rdate.cpanel.net' )
: -x '/usr/local/bin/rdate' ? ( '/usr/local/bin/rdate', '-s', 'rdate.cpanel.net' )
: -x '/usr/local/sbin/rdate' ? ( '/usr/local/sbin/rdate', '-s', 'rdate.cpanel.net' )
: -x '/bin/rdate' ? ( '/bin/rdate', '-s', 'rdate.cpanel.net' )
: ();
# Complain if we don't have an rdate binary.
if ( !@rdate_bin ) {
ERROR("The system could not set the system clock because an rdate binary is missing.");
return;
}
# Set the clock
my $was = time();
ssystem(@rdate_bin);
my $now = time();
INFO( "The system set the clock to: " . localtime($now) );
my $change = $now - $was;
# Adjust the start time if it shifted more than 10 seconds.
if ( abs($change) > 10 ) {
WARN("The system changed the clock by $change seconds.");
$installstart += $change;
WARN( "The system adjusted the starting time to " . localtime($installstart) . "." );
}
else {
INFO("The system changed the clock by $change seconds.");
}
return 1;
}
sub guess_version_from_tier {
my $tier = shift || 'release';
if ( defined( $TIER_CACHE{$tier} ) ) {
return $TIER_CACHE{$tier};
}
# Support version numbers as tiers.
if ( $tier =~ /^\s*\d+\.\d+\.\d+\.\d+\s*$/ ) {
$TIER_CACHE{$tier} = $tier;
return $tier;
}
# Download the file.
cpfetch('/cpanelsync/TIERS');
-e 'TIERS' or FATAL('The installation process could not fetch the /cpanelsync/TIERS file from the httpupdate server.');
# Parse the downloaded TIERS data for our tier. (Stolen from Cpanel::Update)
open( my $fh, '<', 'TIERS' ) or FATAL("The system could not read the downloaded TIERS file.");
while ( my $tier_definition = <$fh> ) {
chomp $tier_definition;
next if ( $tier_definition =~ m/^\s*#/ ); # Skip commented lines.
## e.g. edge:11.29.0 (requires two dots)
next if ( $tier_definition !~ m/^\s*([^:\s]+)\s*:\s*(\S+)/ );
my ( $remote_tier, $remote_version ) = ( $1, $2 );
$TIER_CACHE{$remote_tier} = $remote_version;
}
close $fh;
# Set any disabled tiers to install-fallback if possible.
foreach my $key ( keys %TIER_CACHE ) {
next if $key eq 'install-fallback';
if ( $TIER_CACHE{$key} && $TIER_CACHE{'install-fallback'} && $TIER_CACHE{$key} eq 'disabled' ) {
$TIER_CACHE{$key} = $TIER_CACHE{'install-fallback'};
}
}
# Fail if the tier is not present.
if ( !$TIER_CACHE{$tier} ) {
FATAL("The specified tier ('$tier') in the /etc/cpupdate.conf file is not a valid cPanel & WHM tier.");
}
# Fail if the tier is still disabled.
if ( $TIER_CACHE{$tier} eq 'disabled' ) {
FATAL("cPanel has temporarily disabled updates on the central httpupdate servers. Please try again later.");
}
return $TIER_CACHE{$tier};
}
sub get_cpanel_version {
my $tier = get_cpanel_tier();
my $version = guess_version_from_tier($tier);
return $version;
}
sub get_cpanel_tier {
# Pull in cpupdate.conf settings.
my $cpupdate_conf = read_config('/etc/cpupdate.conf');
# Determine tier or assume defaults.
my $tier = $cpupdate_conf->{'CPANEL'} || 'release';
# version numbers without 11.
if ( $tier =~ /^\d+/ && $tier !~ /^11\./ ) {
$tier = '11.' . $tier;
}
return $tier;
}
sub get_lts_version {
my $cpanel_version = get_cpanel_version();
my ( undef, $lts_version ) = split( qr/\./, $cpanel_version );
return $lts_version;
}
sub create_feature_showcase_dir {
return if -e '/var/cpanel/activate/features';
ssystem( 'mkdir', '-p', '/var/cpanel/activate/features' );
ssystem( 'chown', '-R', 'root:root', '/var/cpanel/activate' );
ssystem( 'chmod', '-R', '0700', '/var/cpanel/activate' );
return;
}
sub _distro_name {
my ( $distro, $full ) = @_;
for my $names (
[ 'centos', 'CentOS', 'CentOS' ],
[ 'redhat', 'Red Hat', 'Red Hat Enterprise Linux®' ],
[ 'cloud', 'CloudLinux', 'CloudLinux™' ],
[ 'amazon', 'Amazon Linux', 'Amazon Linux' ],
) {
return $names->[ $full ? 2 : 1 ] if $distro eq $names->[0];
}
return $distro;
}
sub _verify_file {
my ( $file, $sig, $url ) = @_;
_fetch_gpg_key_once();
my @gpg_args = (
'--logger-fd', '1',
'--status-fd', '1',
'--homedir', gpg_homedir(),
'--verify', $sig,
$file,
);
# Verify the validity of the GPG signature.
# Information on these return values can be found in 'doc/DETAILS' in the GnuPG source.
my ( %notes, $curnote );
my ( $gpg_out, $success, $status );
my $gpg_pid = IPC::Open3::open3( undef, $gpg_out, undef, $gpg_bin, @gpg_args );
while ( my $line = readline($gpg_out) ) {
if ( $line =~ /^\[GNUPG:\] VALIDSIG ([A-F0-9]+) (\d+-\d+-\d+) (\d+) ([A-F0-9]+) ([A-F0-9]+) ([A-F0-9]+) ([A-F0-9]+) ([A-F0-9]+) ([A-F0-9]+) ([A-F0-9]+)$/ ) {
$status = "Valid signature for $file";
$success = 1;
}
elsif ( $line =~ /^\[GNUPG:\] NOTATION_NAME (.+)$/ ) {
$curnote = $1;
$notes{$curnote} = '';
}
elsif ( $line =~ /^\[GNUPG:\] NOTATION_DATA (.+)$/ ) {
$notes{$curnote} .= $1;
}
elsif ( $line =~ /^\[GNUPG:\] BADSIG ([A-F0-9]+) (.+)$/ ) {
$status = "Invalid signature for $file.";
}
elsif ( $line =~ /^\[GNUPG:\] NO_PUBKEY ([A-F0-9]+)$/ ) {
$status = "Could not find public key ($1) in keychain.";
}
elsif ( $line =~ /^\[GNUPG:\] NODATA ([A-F0-9]+)$/ ) {
$status = "Could not find a GnuPG signature in the signature file.";
}
}
waitpid( $gpg_pid, 0 );
$status ||= "Unknown error from gpg.";
$status .= " (file:$file, sig:$sig)";
if ($success) {
INFO $status;
}
else {
FATAL $status;
}
# At this point, the signature should be valid.
# We now need to check to see if the filename signature notation is correct.
$url =~ s/\.bz2$//;
if ( defined( $notes{'filename@gpg.notations.cpanel.net'} ) ) {
my $file_note = $notes{'filename@gpg.notations.cpanel.net'};
if ( $file_note ne $url ) {
FATAL "Filename notation ($file_note) does not match URL ($url).";
}
}
else {
FATAL "Signature does not contain a filename notation.";
}
return;
}
our $_gpg_setup;
sub _fetch_gpg_key_once {
return if $_gpg_setup;
my $pub_keys = public_keys();
_create_gpg_homedir();
foreach my $key ( @{ keys_to_download() } ) {
INFO("Downloading GPG public key, $pub_keys->{$key}");
my $target = secure_downloads() . $pub_keys->{$key};
my $dest = gpg_homedir() . "/" . $pub_keys->{$key};
my $wget_cmd = $wget_args . " " . $dest . " " . $target;
my $wget_out = `$wget_bin $wget_cmd`;
if ( !-e $dest ) {
FATAL("Could not download GPG public key at $target : $wget_out");
return;
}
INFO("Importing downloaded GPG public key from “$dest”.");
my $gpg_cmd = $gpg_bin . " -q --homedir " . gpg_homedir() . " --import " . $dest;
my $output = `$gpg_cmd 2>&1`;
if ( $? != 0 ) {
WARN("Failed to import GPG public key from “$dest”: $output");
}
}
$ENV{'CPANEL_BASE_INSTALL_GPG_KEYS_IMPORTED'} = 1; # in v82+ fix-cpanel-perl will skip gpg keyimport if set
$_gpg_setup = 1;
return;
}
sub _create_gpg_homedir {
mkdir( gpg_homedir(), 0700 ) if !-e gpg_homedir();
return;
}
sub signatures_enabled {
my $config = read_config('/var/cpanel/cpanel.config');
my $is_enabled = ( defined $config->{'signature_validation'} && $config->{'signature_validation'} eq 'Off' ) ? 0 : 1;
return $is_enabled;
}
sub keys_to_download {
my $config = read_config('/var/cpanel/cpanel.config');
my $keyrings = gpg_keyrings();
if ( !defined $config->{'signature_validation'} ) {
my $mirror = get_update_source();
if ( $mirror =~ /^(?:.*\.dev|qa-build|next)\.cpanel\.net$/ ) {
return $keyrings->{'development'};
}
else {
return $keyrings->{'release'};
}
}
elsif ( $config->{'signature_validation'} =~ /^Release and (?:Development|Test) Keyrings$/ ) {
return $keyrings->{'development'};
}
else {
return $keyrings->{'release'};
}
}
sub gpg_homedir {
return '/var/cpanel/.gpgtmpdir';
}
sub public_keys {
return {
'release' => 'cPanelPublicKey.asc',
'development' => 'cPanelDevelopmentKey.asc',
};
}
sub secure_downloads {
return 'https://securedownloads.cpanel.net/';
}
sub gpg_keyrings {
return {
'release' => ['release'],
'development' => [ 'release', 'development' ],
};
}
sub has_kernel_plus_headers {
my $rpm_query = `rpm -q --nodigest --nosignature kernel-plus-headers`;
return $rpm_query =~ /not installed/ ? 0 : 1;
}
sub has_yum_plugin_fastestmirror {
my $rpm_query = `rpm -q --nodigest --nosignature yum-plugin-fastestmirror`;
return $rpm_query =~ /not installed/ ? 0 : 1;
}
sub get_hostname_via_getnameinfo {
return undef if !Socket->can('getaddrinfo');
my ( $err, @getaddr ) = Socket::getaddrinfo(
get_main_ip(),
undef,
{
family => Socket::AF_UNSPEC(),
protocol => Socket::IPPROTO_TCP(),
}
);
for my $addr (@getaddr) {
my ( $err, $host, $service ) = Socket::getnameinfo( $addr->{addr}, Socket::NI_NAMEREQD() );
if ( defined $host ) {
return $host;
}
}
return undef;
}
# Copied from Cpanel::DIp::MainIP
sub get_main_ip {
foreach my $ip ( split( /\n/, `/sbin/ip -4 addr show` ) ) {
if ( $ip =~ m{ [\s\:] (\d+ [.] \d+ [.] \d+ [.] \d+) }xms ) {
my $thisip = $1;
if ( !is_loopback($thisip) ) {
return $thisip;
}
}
}
return 0;
}
# Copied from Cpanel::IP::Loopback
sub is_loopback {
return (
length $_[0]
&& (
$_[0] eq 'localhost' #
|| $_[0] eq 'localhost.localdomain' #
|| $_[0] eq '0000:0000:0000:0000:0000:0000:0000:0001' #
|| ( length $_[0] >= 32 && substr( $_[0], 0, 32 ) eq '0000:0000:0000:0000:0000:ffff:7f' ) # ipv4 inside of ipv6 match 127.*
|| ( length $_[0] >= 11 && substr( $_[0], 0, 11 ) eq '::ffff:127.' ) # ipv4 inside of ipv6 match 127.*
|| ( length $_[0] >= 4 && substr( $_[0], 0, 4 ) eq '127.' ) # ipv4 needs to match 127.*
|| $_[0] eq '0:0:0:0:0:0:0:1' #
|| $_[0] eq ':1' #
|| $_[0] eq '::1' #
|| $_[0] eq '(null)' #
|| $_[0] eq '(null):0000:0000:0000:0000:0000:0000:0000' #
|| $_[0] eq '0000:0000:0000:0000:0000:0000:0000:0000' #
|| $_[0] eq '0.0.0.0'
) #
) ? 1 : 0;
}
# Copied from Cpanel::Sys::Hostname::FQDN
sub get_fqdn_hostname {
my $hostname_from_sys_hostname = Sys::Hostname::hostname();
$hostname_from_sys_hostname =~ tr{A-Z}{a-z};
my $hostname_from_getnameinfo = get_hostname_via_getnameinfo() || "";
if ( !length $hostname_from_getnameinfo ) {
return $hostname_from_sys_hostname;
}
$hostname_from_getnameinfo =~ tr{A-Z}{a-z};
if ( index( $hostname_from_getnameinfo, $hostname_from_sys_hostname ) == 0 ) {
return $hostname_from_getnameinfo;
}
return $hostname_from_sys_hostname;
}
# These packages are needed for MySQL later in the install
# By installing them now we do not have to wait for
# download
sub background_download_packages_used_during_initial_install {
my @sysup_packages_to_install = qw{python python-devel python-docs python-setuptools quota quota-devel expat expat-devel};
my @ea4_packages_to_install = qw{elinks js libssh2 libssh2-devel libvpx nss_compat_ossl scl-utils perl-libwww-perl krb5-devel perl-Compress-Raw-Bzip2 perl-Compress-Raw-Zlib autoconf automake};
my @mysql_support_packages_to_install = qw{numactl-libs grep shadow-utils coreutils perl-DBI};
my @packages_to_install = ( @mysql_support_packages_to_install, @sysup_packages_to_install, @ea4_packages_to_install );
if ( my $pid = fork() ) {
# Parent
return $pid;
}
else {
$collect_output = '';
my @epel;
if ( -e "/etc/yum.repos.d/epel.repo" ) { # for ea4
@epel = ('--enablerepo=epel');
}
local $@;
eval { yum_nohang_ssystem( '/usr/bin/yum', @epel, '--downloadonly', '-y', 'install', @packages_to_install ); };
print $collect_output;
undef $collect_output;
die if $@;
exit(0);
}
die "Failed to fork to create background rpm download: $!";
}
# Copied from Cpanel::RpmUtils::Parse
sub parse_rpm_arch {
my ($filename) = @_;
#
# Example:
#
# cpanel-perl-522-Acme-Bleach-1.150-1.cp1156.x86_64.rpm
# ea-php70-libc-client-2007f-7.7.1.x86_64
# glibc-common-2.12-1.192.el6.x86_64.rpm
#
$filename =~ s{\.rpm$}{};
my @rpm_parts = split( /\./, $filename );
my $arch = pop @rpm_parts; # x86_64 (glibc-common-2.12-1.192.el6)
my $name_with_version = join( '.', @rpm_parts ); # glibc-common-2.12-1.192.el6
my $name_version_parse = parse_rpm($name_with_version);
return {
'arch' => $arch,
%$name_version_parse,
};
}
# Copied from Cpanel::RpmUtils::Parse
sub parse_rpm {
my ($name_with_version) = @_;
my @name_version_parts = split( m{-}, $name_with_version );
my $release = pop @name_version_parts; # 1.192.el6 (glibc-common-2.12)
my $version = pop @name_version_parts; # 2.12 (glibc-common)
my $name = join( '-', @name_version_parts );
$name =~ s/^\d+://; # TODO/YAGNI: include epoch (or lack thereof) in results?
return {
'release' => $release,
'version' => $version,
'name' => $name
};
}
sub _get_recommended_mysql_version {
my $version = shift;
return ( $version < 79 ) ? 5.5 : 5.6;
}
sub max {
my ( $a, $b ) = @_;
return $a > $b ? $a : $b;
}
sub version_cmp {
my ( $a, $b ) = @_;
my @parts_a = split /\./, $a;
my @parts_b = split /\./, $b;
my $len = max( scalar @parts_a, scalar @parts_b );
for ( my $i = 0; $i < $len; $i++ ) {
my $part_a = $parts_a[$i];
my $part_b = $parts_b[$i];
return 1 unless defined $part_b;
return -1 unless defined $part_a;
my $result = $part_a <=> $part_b;
return $result unless $result == 0;
}
return 0;
}
sub version_lt {
my ( $a, $b ) = @_;
return version_cmp( $a, $b ) < 0 ? 1 : 0;
}
sub version_gte {
my ( $a, $b ) = @_;
return version_cmp( $a, $b ) > -1 ? 1 : 0;
}
sub is_valid_hostname {
my $domain = shift;
if ( !defined $domain ) {
return;
}
# No blank or space characters
if ( $domain =~ m/\s+/ ) {
return;
}
if ( $domain =~ m/[.]{2,}/ ) {
return;
}
# Can not end with period
if ( $domain =~ m/[.]$/ ) {
return;
}
# Can not end with minus sign
if ( $domain =~ m/[-](?=[.]|\z)/ ) {
return;
}
# Must be able to fit in struct utsname
if ( length $domain > 64 ) {
return;
}
# Can't have an all-numeric TLD or be an IP address
if ( $domain =~ m/\.\d+\z/ ) {
return;
}
# Must start with alpha numeric, and must have atleast one 'label' part - i.e., label.domain.tld
if ( $domain =~ /^(?:[a-z0-9][a-z0-9\-]*\.){2,}[a-z0-9][a-z0-9\-]*$/i ) {
return 1;
}
return;
}
1;