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#!/usr/local/cpanel/3rdparty/bin/perl
# cpanel - scripts/check_users_my_cnf 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::PwCache::PwEnt ();
use Cpanel::PwCache ();
use Cpanel::AccessIds ();
use Getopt::Param ();
use Cpanel::DBI::Mysql ();
use Cpanel::MysqlUtils::Running ();
my $prm = Getopt::Param->new(
{
'help_coderef' => sub {
print <<"END_USAGE";
Check users for ~/.my.cnf files that do not work and disable them. By default it only has output when a bad ~/.my.cnf is detected.
$0 --help - this screen
$0 --verbose - Display verbose information about the user's being checked and ~/.my.cnf status.
$0 --dryrun - do not disable an invalid ~/.my.cnf just report the problem
$0 --user=USERA [--user=USERB} - specify a user (or users by using more than one --user flag) to check instead of checking all users
$0 --perm-only - Do not test the connectivity, only do the mode and ownership check.
END_USAGE
exit;
},
}
);
my %users;
@users{ $prm->param('user') } = ();
my $hasuser = $prm->param('user') ? 1 : 0;
my $verbose = $prm->param('verbose') ? 1 : 0;
my $dryrun = $prm->param('dryrun') ? 1 : 0;
my $justprm = $prm->param('perm-only') ? 1 : 0;
_mysql_is_up_or_stop() if !$justprm;
my $root_home = ( Cpanel::PwCache::getpwnam('root') )[7];
my @PW;
Cpanel::PwCache::PwEnt::setpwent();
sub _iterate_pw { ## no critic qw(ProhibitExcessComplexity)
while ( @PW = Cpanel::PwCache::PwEnt::getpwent() ) {
next if $hasuser && !exists $users{ $PW[0] };
print "Starting '$PW[0]' ...\n" if $verbose;
my $file = "$PW[7]/.my.cnf";
if ( -e $file ) {
# if ( chdir $PW[7] ) {
my $check = sub {
# untaint
my ($_file) = $file =~ m{(.*)};
# check perms before connectivity test since bad perms can prevent connection
# Warning: World-writable config file '/root/.my.cnf' is ignored
my ( $mode, $uid, $gid ) = ( stat($_file) )[ 2, 4, 5 ];
my $perm = sprintf( '%04o', $mode & 07777 );
# ? only check-for and remove world-writableness ?
# if worldly
if ( $mode & 0007 ) {
my $newmode = $mode & ~007; # remove wordlyness
my $newperm = sprintf( '%04o', $newmode & 07777 );
if ($dryrun) {
print "\tLeaving mode at '$perm' as per --dryrun flag.\n";
}
else {
print "\tChanging $_file\'s mode from '$perm' to '$newperm'.\n" if $verbose;
chmod( $newmode, $_file ) or print "\tCould not chmod() '$_file' to '$newperm': $!\n";
}
}
if ( $uid != $PW[2] || $gid != $PW[3] ) {
warn("Ownership of '$_file' is '$uid:$gid' and it should probably be '$PW[2]:$PW[3]'.");
}
my $dbh = eval {
Cpanel::DBI::Mysql->connect(
{ mysql_read_default_file => $_file },
);
};
if ($dbh) {
print "\tThe file '$_file' is valid.\n" if $verbose;
return 1;
}
print "\tThe file '$_file' is invalid:\n\t\t$@\n";
return;
};
my $disable = sub {
# untaint
my ($_file) = $file =~ m{(.*)};
if ($dryrun) {
print "\tLeaving file in place as per --dryrun flag.\n";
}
else {
require Cpanel::Time::ISO;
# TODO: rewrite with auth data commented out
my $rename_to = "$_file.$$." . Cpanel::Time::ISO::unix2iso();
if ( rename $_file => $rename_to ) {
print "Successfully renamed “$_file” to “$rename_to”.\n";
}
else {
print "\tFailed to rename “$_file” to “$rename_to”: $!\n";
}
}
};
# for entries like this: operator:x:11:0:operator:/root:/sbin/nologin
if ( $PW[2] != 0 && $PW[7] eq $root_home ) {
print "\tnon-root user with root's homedir detected, skipping\n" if $verbose;
}
else {
if ($justprm) {
print "\tSkipping connectivity test as per --perm-only flag.\n" if $verbose;
}
else {
if ( $PW[2] == 0 ) {
my $rc = $check->();
if ( !$rc ) {
_mysql_is_up_or_stop();
$disable->();
}
}
else {
my $rc = Cpanel::AccessIds::do_as_user( $PW[0], $check );
if ( !$rc ) {
_mysql_is_up_or_stop(); # detect false positive from when mysql is down, needs run as root
Cpanel::AccessIds::do_as_user( $PW[0], $disable );
}
}
}
}
# }
# else {
# print "\tCould not change into directory '$PW[7]': $!\n";
# }
}
else {
print "\tThe file '$file' does not exist.\n" if $verbose;
}
print " ... Done.\n" if $verbose;
}
return;
}
_iterate_pw();
Cpanel::PwCache::PwEnt::endpwent();
sub _mysql_is_up_or_stop {
die "MySQL is not available.\n" if !Cpanel::MysqlUtils::Running::is_mysql_running();
return;
}