open ( CRON, "ssh host crontab -l" ) || die $!;
while ( <CRON> ) {
     print $_;
}

##</code><code>##

open ( RSYNC, "rsync -az -e \"ssh -o BatchMode=yes\" --delete-after host:/path/to/dir /path/to/backup |" );

while ( <RSYNC> ) {
     print "output: $_";
}