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

# cpanel - scripts/upcp-running                    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 Cpanel::Unix::PID::Tiny ();
use Cpanel::Usage           ();

my $invert_exit;
my $logfile;
my $pid;
my $quiet;

Cpanel::Usage::wrap_options(
    \@ARGV,
    \&print_usage_and_exit,
    {
        'invert-exit' => \$invert_exit,
        'logfile'     => \$logfile,
        'pid'         => \$pid,
        'quiet'       => \$quiet,
    },
);

$invert_exit = $invert_exit ? 1 : 0;
$quiet       = $quiet       ? 1 : 0;

my $found_process;
my $pid_matched;
my $is_newest_logfile;

my $pidfile = '/var/run/upcp.pid';
my $upid    = Cpanel::Unix::PID::Tiny->new();
my $curpid  = $upid->get_pid_from_pidfile($pidfile);

if ($curpid) {
    if ( $upid->is_pid_running($curpid) ) {
        $found_process = 1;
        if ( $curpid eq $pid ) {
            $pid_matched = 1;
        }
    }
}

if ( $logfile && opendir my $dh, '/var/cpanel/updatelogs' ) {
    while ( my $entry = readdir $dh ) {
        next if $entry !~ m/^update\.\d+\.log$/;
        if ( $entry gt $logfile ) {
            undef $is_newest_logfile;
            last;
        }
        $is_newest_logfile = 1;
    }
    closedir $dh;
}

my $upcp_running = 0;
if ( $pid && $logfile ) {
    if ( $pid_matched && $is_newest_logfile ) {
        $upcp_running = 1;
    }
}
elsif ($pid) {
    if ($pid_matched) {
        $upcp_running = 1;
    }
}
elsif ($logfile) {
    if ($is_newest_logfile) {
        $upcp_running = 1;
    }
}
elsif ($found_process) {
    $upcp_running = 1;
}

if ( !$quiet ) {
    if ($upcp_running) {
        print "upcp is running.\n";
    }
    else {
        print "upcp is not running.\n";
    }
}

exit( !$upcp_running ^ $invert_exit );

sub print_usage_and_exit {
    my ($error) = @_;

    my %options = (
        'help'        => 'Brief help message',
        'invert-exit' => 'Exit with an error value if upcp is running',

        ## internal usage parameters
        #'logfile'     => 'Log file that target upcp is writing/wrote to',
        #'pid'         => 'PID of the target upcp',
    );

    if ( defined $error ) {
        print $error, "\n\n";
    }

    print "Usage: $0 ";
    print "[options]\n\n";
    print "    Options:\n";

    while ( my ( $opt, $desc ) = each %options ) {
        print "      --$opt";
        my $space = 12 - length $opt;
        ( 0 < $space ) ? print ' ' x $space : print '  ';
        print "$desc\n";
    }

    exit 1 if defined $error;
    exit;
}