DFSMSdfp Callable Services

User programs written in assembler language and in high-level languages can call the DFSMSdfp callable services.

IGWABWO: Retrieves or sets data set indicators. For example, your program can determine if a data set can be backed up while it is open for update.
IGWARLS: Obtains information about the record-level sharing attributes for a VSAM data set.
IGWASMS: Determines if a data set is system-managed, and returns the SMS class names and data set type.
IGWASYS: Determines the version, release, and modification level of DFSMS and the status of the SMS subsystem.
IGWLSHR: Determines the DFSMSdfp share attributes currently in use on the system.

Related reading: For more information, see z/OS DFSMSdfp Advanced Services.