Triggers and Unix Time Format

Is is possible to set update time (in Unix format time_t) in a trigger? We have an update trigger in our database which keeps two tables in sync for any updates and would like to keep track of the time when the trigger was run. The table has a column which keeps a record of the update time in unix format (a long number, yeah we gave up on using Informix datetime crazy formats and prefer good old Unix !!) An idealistic C/Trigger statement would look like: create trigger Aupdate of col1A on tableA referencing new as newA for each row (update tableB set col2B = time(0) --How to do this ? where --col2B is long & time() is an Unix func col3B = newA.col4A --some condition ); Thanks, Vaibhav Dahake