Function: MTBSF Purpose: Backward spaces tape marks on a specified tape device. Category: TAPES File: mtiodev.c Author: K.G. Begeman Use: INTEGER MTBSF( MTID, Input INTEGER NFIL ) Input INTEGER MTBSF Returns: >0 : Number of files skipped backwards. -1 : System error. -4 : Tape device not open. -9 : Call error. MTID Tape device id returned by MTOPEN. NFIL Number of files to skip backward. Warning: Code is System dependent! Updates: Jul 20, 1989, KGB, Document created.