oracle8i backup an recovery guide says that:

if you use a backup control file, then oracle starts media
recovery using the lowest of the following :the control file
SCN and the lowest SCN in the datafile headers.

does that means during the backup process, oracle will
update control file as well? so i can use backup control file
for complete recovery, and at the end of recovery, backup
control file will be updated to the same as the current control
file.