#!/usr/bin/perl -w
# PrepareSnapshot
# Vadim Mikheev, (c) 2000, PostgreSQL Inc.

eval '(exit $?0)' && eval 'exec perl -S $0 ${1+"$@"}'
    & eval 'exec perl -S $0 $argv:q'
    if 0;

BEGIN {
	my $basedir = $0; $basedir =~ s#/[^/]+$##;
	unshift(@INC, "$basedir/../share");
}

use strict;
use IO::File;
use Getopt::Long;
use RServ;

$| = 1;

my ($debug,$verbose) = (0,0);
my ($help,$masterhost,$masterport,$masteruser,$masterpassword,
	$slavehost,$slaveport,$slaveuser,$slavepassword,
	$multimaster,$snapshot,
);

my $result = GetOptions(
	"debug!" => \$debug, "verbose!" => \$verbose, "help" => \$help,
	"masterhost=s" => \$masterhost, "masterport=i" => \$masterport,
	"masteruser=s" => \$masteruser, "masterpassword=s" => \$masterpassword,
	"multimaster" => \$multimaster,
	"snapshot=s" => \$snapshot,
	);

if (defined($help) || (scalar(@ARGV) < 2)) {
    print "Usage: $0 [options] masterdb slavedb
Options:
	--masterhost=hostname --masterport=port
	--masteruser=username --masterpassword=string
	--multimaster
	--snapshot=snapshot
";
    exit ((scalar(@ARGV) < 2)? 1:0);
}

$RServ::quiet = !$verbose;
if ($debug) {
	$RServ::quiet = 0;
	no warnings 'vars';
	$RServ::debug = $debug;
}

my $master = $ARGV[0] || "master";
my $slave = $ARGV[1] || "slave";

my $minfo = MkInfo($master,$masterhost,$masterport,$masteruser,$masterpassword);
my $sinfo = MkInfo($slave,$slavehost,$slaveport,$slaveuser,$slavepassword);

my $mconn = Pg::connectdb($minfo);
if ($mconn->status != Pg::PGRES_CONNECTION_OK) {
    print STDERR "Failed opening $minfo\n";
    exit 1;
}
my $sconn = Pg::connectdb($sinfo);
if ($sconn->status != Pg::PGRES_CONNECTION_OK) {
    print STDERR "Failed opening $minfo\n";
    exit 1;
}

my $outf;
if (defined($snapshot)) {
    $outf = new IO::File;    
    $outf->open("> $snapshot");
} else {
    $outf = *STDOUT;
}

$slavehost = 'localhost' if (! $slavehost);
my $slaveId  = GetServerId($mconn, $slave, $slavehost);
if (! defined($slaveId)) {
	print STDERR "Can't find SlaveId for db '$slave' on host $slavehost. Is this database slave?\n";
	exit 1;
}
die "Unknown SlaveId $slaveId for host $slavehost" if ($slaveId < 0);

$masterhost = 'localhost' if (! $masterhost);
my $masterId  = GetServerId($mconn, $master, $masterhost);
if (! defined($masterId)) {
	print STDERR "Can't find masterId for db '$master' on host $masterhost. Is this database master?\n";
	exit 1;
}
die "Unknown masterId $masterId for host $masterhost" if ($masterId < 0);
my $res = PrepareSnapshot ($mconn, $sconn, $outf, $masterId, $slaveId, $multimaster);

if ($res == 0)
{
    printf STDERR "Sync-ed\n";
    exit(0);
}
if ($res > 0)
{
    printf STDERR "Snapshot dumped.\n";
    exit(0);
}

printf STDERR "ERROR\n";
exit(1);