/usr/bin/pg_dropcluster is in postgresql-common 173.
This file is owned by root:root, with mode 0o755.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 | #!/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>
# (C) 2015 Christoph Berg <myon@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
my $startconf;
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'};
$startconf = $info{'start'};
} 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
}
# remove stats_temp_directory
if ($info{statstempdir}) {
my $statsowner = (stat($info{statstempdir}))[4];
if (defined $statsowner and $statsowner == $info{owneruid}) {
foreach my $f (<$info{statstempdir}/*.stat>) {
unlink ($f =~ /(.*)/); # untaint
}
rmdir $info{statstempdir};
}
}
# notify systemd when an autostarted cluster went away
if (not exists $ENV{'PG_CLUSTER_CONF_ROOT'} and $startconf eq 'auto' and -d '/run/systemd/system') {
if ($> == 0) {
system 'systemctl daemon-reload';
} elsif (-t 1) {
print "Warning: systemd was not informed about the removed yet. Operations like \"service postgresql start\" might fail. To fix, run:\n";
print " sudo systemctl daemon-reload\n";
}
}
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>>
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