Catch failed queries with ORA-01555 (snapshot too old) in alert log.

Hello,

I’m  looking  for script (shell  bash)  to catch a queries failed with  ORA-01555 (snapshot too old) in alert log.

I need to cron this script to receive  a report  with the queries failed 

ORA-01555 caused by SQL statement below (SQL ID: gg2gu3gms5jyc, Query Duration=13436 sec, SCN: 0x003d.327a7f52):

Sat Mar 29 15:23:40 CET 2014

select *

from  …….

ORA-01555 caused by SQL statement below (SQL ID: gg2gu3gms5jyc, Query Duration=558sec, SCN: 55.327a7f52):

Sat Mar 28 15:22:40 CET 2014

select *

from  …….

Best Regards

Djm