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#!/usr/local/cpanel/3rdparty/bin/perl
# cpanel - scripts/apachelimits 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
package scripts::apachelimits;
use strict;
use warnings;
use Cpanel::Usage ();
use Cpanel::HttpUtils::Rlimits ();
use Cpanel::HttpUtils::ApRestart::BgSafe ();
use Cpanel::Server::Type::License ();
exit unless Cpanel::Server::Type::License::is_ea4_allowed();
exit __PACKAGE__->runner(@ARGV) if not caller();
sub runner {
my ( $class, @argv ) = @_;
#this is under the artistic lics
print "Apache Limiter by cPanel, Inc. <copyright\@cpanel.net>\n\n";
my $opts;
my %OPTS = (
'current' => \$opts->{'current'},
'rlimitmem' => \$opts->{'rlimitmem'},
'disable' => \$opts->{'disable'},
'restart' => \$opts->{'restart'},
);
Cpanel::Usage::wrap_options( \@argv, \&show_help, \%OPTS );
if ( $> != 0 ) {
print "[!] Sorry, only root can use this utility to modify Apache RLimits on the server.\n";
return 1;
}
if ( $opts->{'current'} ) {
return _current_rlimits();
}
elsif ( $opts->{'disable'} ) {
return _disable_rlimits( $opts->{'restart'} );
}
else {
return _set_rlimits( $opts->{'rlimitmem'}, $opts->{'restart'} );
}
}
sub _current_rlimits {
my $current = Cpanel::HttpUtils::Rlimits::get_current_rlimitmem() || 0;
my $current_MB = int( $current / ( 1024 * 1024 ) );
print "[*] Current RLimitMEM: $current ( $current_MB MB )\n";
return;
}
sub _disable_rlimits {
my $restart_apache = shift;
my $status;
print "[*] Removing rlimits ... \n";
eval { $status = Cpanel::HttpUtils::Rlimits::unset_rlimits_in_apache(); };
if ( !$status ) {
if ($@) {
print "[!] Failed to remove rlimits: $@\n";
}
else {
print "[!] Failed to remove rlimits: Unknown error.\n";
}
}
else {
print "[+] Removed rlimits successfully.\n";
}
return _restart_apache() if $restart_apache;
return;
}
sub _set_rlimits {
my ( $size, $restart_apache ) = @_;
$size = _parse_rlimit($size);
if ( !$size ) {
print "[*] No valid rlimit specified. Calculating Limit to use...\n";
($size) = Cpanel::HttpUtils::Rlimits::determine_rlimitmem_for_apache();
if ( !$size ) {
print "[!] Unable to determine appropriate memory limit.\n";
return 1;
}
}
my $size_MB = int( $size / ( 1024 * 1024 ) );
_current_rlimits();
print "[*] Setting rlimit to: $size bytes( $size_MB MB ).\n";
my $status;
eval { $status = Cpanel::HttpUtils::Rlimits::set_rlimits_in_apache($size); };
if ( !$status ) {
if ($@) {
print "[!] Failed to set new Rlimit: $@\n";
}
else {
print "[!] Failed to set new Rlimit: Unknown error.\n";
}
}
else {
print "[+] Largest webserver child cgi/ssi/php is now limited to $size_MB MB.\n";
}
return _restart_apache() if $restart_apache;
return;
}
sub _restart_apache {
Cpanel::HttpUtils::ApRestart::BgSafe::restart();
print "[+] Apache restarting the background.\n";
return;
}
sub _parse_rlimit {
my $input = shift or return;
if ( $input =~ m/([0-9]+)([M])?$/i ) {
my $number = $1;
my $type = $2;
if ( $type eq "M" or $type eq "m" ) {
$number *= 1024 * 1024;
}
return $number;
}
return;
}
sub show_help {
print <<"EOM";
$0: Command line tool to manage Apache RLimits.
Usage:
$0
--current : Display the current RlimitMEM value.
--rlimitmem : The new RlimitMEM value to use. You can specify this in MB (eg: 64M), or bytes (eg: 67108864).
--disable : Remove the RlimitMEM and RlimitCPU limits.
--restart : Restart Apache after the changes have been made (Default: off)
Note: If none of these options are specified, then the script will determine a value for RlimitMEM based on the amount of ram and swap available on the server, and update the limit to this value.
EOM
exit 1;
}