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Current File : //home/../run/../../sbin/../../usr/bin/pg_dropcluster
#!/usr/bin/perl -wT

# Completely delete a PostgreSQL cluster. Fails if there is still a server
# process attached.
#
# (C) 2005-2009 Martin Pitt <mpitt@debian.org>
#
#  This program is free software; you can redistribute it and/or modify
#  it under the terms of the GNU General Public License as published by
#  the Free Software Foundation; either version 2 of the License, or
#  (at your option) any later version.
#
#  This program is distributed in the hope that it will be useful,
#  but WITHOUT ANY WARRANTY; without even the implied warranty of
#  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
#  GNU General Public License for more details.

use Getopt::Long;
use PgCommon;

# untaint environment
$ENV{'PATH'} = '/bin:/usr/bin';
delete @ENV{'IFS', 'CDPATH', 'ENV', 'BASH_ENV'};

$stopserver = 0;
exit 1 unless GetOptions ('stop-server' => \$stopserver, 'stop' => \$stopserver);

# command line options
if ($#ARGV != 1) {
    print "Usage: $0 [--stop] <version> <cluster>\n";
    exit 1;
}

($version) = $ARGV[0] =~ /^(\d+\.\d+)$/;
($cluster) = $ARGV[1] =~ /^([-.\w]+)$/;
error 'invalid version' unless defined $version;
error 'invalid cluster name' unless defined $cluster;

my %info;
my $c; # configuration directory

if (cluster_exists $version, $cluster) {
    %info = cluster_info ($version, $cluster);
    if ($info{'running'}) {
	if ($stopserver) {
	    if ($info{'pgdata'} && -d $info{'pgdata'}) {
		if (system ('pg_ctlcluster', $version, $cluster, 'stop')) {
		    error 'could not stop server, aborting';
		}
	    } else {
		print STDERR "warning: corrupted cluster: data directory does not exist any more, but server is still running; you have to manually kill the postmaster process\n";
	    }
	} else {
	    error 'This cluster is still running. Stop it or supply the --stop option';
	}
    }
    $c = $info{'configdir'};
} else {
    $c = "/etc/postgresql/$version/$cluster";

    # check if we have a broken cluster, clean up if necessary
    -d $c or error 'specified cluster does not exist';
}

if ($info{'pgdata'} && -d $info{'pgdata'}) {
    $result = system 'rm', '-r', $info{'pgdata'}; 
    if ($result) {
        if (! -w ($info{'pgdata'} . '/..')) {
            error 'you might need to run this program with root privileges';
        }
        exit $result;
    }
} else {
    print STDERR "warning: corrupted cluster: data directory does not exist\n";
}
unlink $c.'/pg_hba.conf', $c.'/pg_ident.conf', $c.'/postgresql.conf',
    $c.'/start.conf', $c.'/log', $c.'/autovacuum_log', $c.'/pgdata',
    $c.'/environment', $c.'/pg_ctl.conf';
unlink $info{'logfile'} if defined ($info{'logfile'});
if ($info{'socketdir'} !~ /^(\/tmp|\/var\/run\/postgresql)\/?$/) {
    rmdir $info{'socketdir'};
}
rmdir $c;
rmdir "/etc/postgresql/$version";
rmdir "/var/lib/postgresql/$version/$cluster";
rmdir "/var/lib/postgresql/$version";
unlink "/var/log/postgresql/postgresql-$version-$cluster.log";
# remove logrotated files
foreach my $f (</var/log/postgresql/postgresql-$version-$cluster.log.[1-9]*>) {
    unlink ($f =~ /(.*)/); # untaint
}
exit 0;

__END__

=head1 NAME

pg_dropcluster - completely delete a PostgreSQL cluster

=head1 SYNOPSIS

B<pg_dropcluster> [B<--stop>] I<cluster-version> I<cluster-name>

=head1 DESCRIPTION

This program removes all files that belong to a given PostgreSQL cluster; that
includes the data directory, the log file, and all configuration files that
were created by L<pg_createcluster(1)>. If the configuration directory
(C</etc/postgresql/>I<version>C</>I<cluster>) is empty after this, it is
removed as well.
An empty socket directory other than B</var/run/postgresql> or B</tmp> is
also removed.

Usually a cluster which still has a running server attached will not be
deleted. To override this, the B<--stop> option forces a server shutdown
before the files are removed.

=head1 SEE ALSO

L<pg_createcluster(1)>, L<pg_ctlcluster(1)>

=head1 AUTHOR

Martin Pitt L<E<lt>mpitt@debian.orgE<gt>>

NineSec Team - 2022