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#!/usr/local/cpanel/3rdparty/bin/perl

# cpanel - scripts/verify_vhost_includes           Copyright 2022 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

use strict;
use warnings;
use File::Spec;
use Cpanel::ConfigFiles::Apache          ();
use Getopt::Param                        ();
use Cpanel::SafeRun::Errors              ();
use Cpanel::FileUtils::Move              ();
use Cpanel::FileUtils::TouchFile         ();
use Cpanel::ConfigFiles::Apache::modules ();

my $apacheconf = Cpanel::ConfigFiles::Apache->new();

my $prm = Getopt::Param->new(
    {
        'help_coderef' => sub {
            print <<"END_HELP";
Verify that vhost includes are valid with the current apache.

$0 --help  (this screen)

   --commit
     Actually do changes, otherwise it's only an informational dryrun

   --hide-valid
     Do not show output for files that are ok

   --show-test-output
     Show the output of the test

   --only-ext=(owner|conf)
     Only check a specific type of incldue. Valid values are:
        'conf'  - *.conf files
        'owner' - *.owner-{RESELLER_NAME_HERE}

END_HELP
            exit;
        },
    }
);

die $apacheconf->bin_httpd() . " does not exist"    if !-e $apacheconf->bin_httpd();
die $apacheconf->bin_httpd() . " is not executable" if !-x $apacheconf->bin_httpd();

my $httpdconf             = $apacheconf->file_conf();
my $vhostless_for_testing = $apacheconf->dir_conf() . '/_ensure_vhost_includes_vhostless_test_file';

my $default_target_empty_file = "$vhostless_for_testing.conf";
Cpanel::FileUtils::TouchFile::touchfile($default_target_empty_file);
die "default include for test is not empty" if -s $default_target_empty_file;

my $include_symlink = "$vhostless_for_testing.inc";
if ( ( readlink($include_symlink) || '' ) ne $default_target_empty_file ) {
    unlink $include_symlink;    # must remove it so it can be created
    symlink( $default_target_empty_file, $include_symlink );

    if ( ( readlink($include_symlink) || '' ) ne $default_target_empty_file ) {
        die "Default symlink for test failed";
    }
}

my $test_mtime = ( stat($vhostless_for_testing) )[9] || 0;
if ( ( stat($httpdconf) )[9] >= $test_mtime ) {

    # create $vhostless_for_testing
    if ( open my $fh_r, '<', $httpdconf ) {
        if ( open my $fh_w, '>', $vhostless_for_testing ) {
          READ_CONF:
            while ( my $line = readline($fh_r) ) {
                if ( $line =~ m/^\s*\<VirtualHost /i ) {
                    last READ_CONF;
                }
                print {$fh_w} $line;
            }
            print {$fh_w} "<VirtualHost *>\nInclude \"$include_symlink\"\n</VirtualHost>\n";
            close $fh_w;
        }
        else {
            die "Could not open '$vhostless_for_testing' for writing: $!";
        }
        close $fh_r;
    }
    else {
        die "Could not open '$httpdconf' for reading: $!";
    }
}

my $initial_test_result = Cpanel::SafeRun::Errors::saferunallerrors( $apacheconf->bin_httpd(), qw(-DSSL -t -f), $vhostless_for_testing );
if ( $initial_test_result !~ m{Syntax\s+OK}i ) {
    die "Default vhostless config file for test has bad syntax";
}

my $only = $prm->get_param('only-ext') || '';
$only = '' if $only ne 'conf' && $only ne 'owner';

my $testout = $prm->get_param('show-test-output') || '';
my $hideok  = $prm->get_param('hide-valid')       || '';

my $dryrun = !$prm->get_param('commit') ? 1 : 0;

my $no_vhost_httpd_conf = 'TODO';

my $path = $apacheconf->dir_conf_userdata();
_proc_files_in($path);

my $apache_version = Cpanel::ConfigFiles::Apache::modules::apache_version( { 'places' => 2 } );
for my $type (qw( std ssl )) {
    _proc_files_in("$path/$type");
    for my $apv ( qw( 1 2 ), $apache_version ) {
        _proc_files_in("$path/$type/$apv");
        for my $user ( _get_dirs_in("$path/$type/$apv") ) {
            _proc_files_in( "$path/$type/$apv/$user", 1 );    # IE no .owner- here
            for my $domain ( _get_dirs_in("$path/$type/$apv/$user") ) {
                _proc_files_in( "$path/$type/$apv/$user/$domain", 1 );    # IE no .owner- here
            }
        }
    }
}

# cleanup for next time:
unlink $include_symlink;    # must remove it so it can be created
symlink( $default_target_empty_file, $include_symlink );

sub _get_dirs_in {
    my ($dir) = @_;
    return if !-d $dir;
    opendir my $root_dh, $dir or die qq{Could not opendir '$dir': $!};
    my @dirs = grep { !m{ \A [.]+ \z }xms && -d "$dir/$_" } readdir($root_dh);
    closedir $root_dh;
    return @dirs;
}

sub _proc_files_in {
    my ($path) = @_;
    return if !-d $path;

    opendir my $root_dh, $path or die qq{Could not opendir '$path': $!};
    my @files = grep { !m{ \A [.]+ \z }xms && -f "$path/$_" } readdir($root_dh);
    closedir $root_dh;

    for my $file ( map { File::Spec->catfile( $path, $_ ) } @files ) {
        _handle_abs_path($file);
    }
}

sub _handle_abs_path {
    my ( $abs_path, $no_owner ) = @_;

    my $is_owner  = $abs_path =~ m{ [.] owner [-] \S+ \z }xms ? 1 : 0;
    my $is_conf   = $abs_path =~ m{ [.] conf \z }xms          ? 1 : 0;
    my $is_broken = $abs_path =~ m{ [.] broken \z }xms        ? 1 : 0;

    return if $is_owner && $no_owner;
    return if $is_owner && $only eq 'conf';
    return if $is_conf  && $only eq 'owner';

    unlink $include_symlink;    # must remove it so it can be created
    symlink( $abs_path, $include_symlink );

    if ( readlink($include_symlink) ne $abs_path ) {
        return;
    }

    my $test_result = Cpanel::SafeRun::Errors::saferunallerrors( $apacheconf->bin_httpd(), qw(-DSSL -t -f), $vhostless_for_testing );
    if ( $test_result =~ m{Syntax\s+OK}i ) {
        print "Testing $abs_path...ok\n" if !$hideok;
        if ($is_broken) {
            print "Testing $abs_path...ok\n" if $hideok;    # print it her eunder this circumstance even if we're not above and not if we already have
            if ( !$dryrun ) {
                my $orig = $abs_path;
                $orig =~ s{.broken}{};
                if ( Cpanel::FileUtils::Move::safemv( $abs_path, $orig ) ) {
                    print "\tMoved '$abs_path'\n\tback to '$orig'...\n";
                }
                else {
                    print "\tUnable to move '$abs_path'\nto '$orig' for safety, you will want to do this manually...\n";
                }
            }
            else {
                print "\tNo changes made without --commit flag\n";
            }
        }
        print "[TEST RESULTS]\n$test_result\n[/TEST RESULTS]\n\n" if $testout && !$hideok;
    }
    else {
        print "Testing $abs_path...";
        if ($is_broken) {
            print "Still broken\n";
        }
        else {
            print "FAILED\n";
            if ( !$dryrun ) {
                if ( Cpanel::FileUtils::Move::safemv( $abs_path, $abs_path . '.broken' ) ) {
                    print "\tMoved '$abs_path'\n\tto '$abs_path.broken' for safety...\n";
                }
                else {
                    print "\tUnable to move '$abs_path'\nto '$abs_path.broken'for safety, you will want to do this manually...\n";
                }
            }
            else {
                print "\tNo changes made without --commit flag\n";
            }
        }

        print "[TEST RESULTS]\n$test_result\n[/TEST RESULTS]\n\n" if $testout;
    }
}