You can customize DFSMSdss by coding exit routines. The following installation exit routines are supplied with DFSMSdss:

Authorization installation exit routine (ADRUPSWD)

Forces authorization checking of protected data sets

Enqueue installation exit routine (ADRUENQ)

Forces enqueuing of the volume table of contents (VTOC)

Options installation exit routine (ADRUIXIT)

Can override any default or user-specified command options in the input stream

Reblock installation exit routine (ADRREBLK)

Allows DFSMSdss, during a data set copy or data set restore operation, to use the block size it selects for the target data set.