extern void SItrash( int type, void *bp );
extern int SIwait( struct ginfo_blk *gptr );
extern struct ginfo_blk* SIinitialise( int opts );
extern void SItrash( int type, void *bp );
extern int SIwait( struct ginfo_blk *gptr );
extern struct ginfo_blk* SIinitialise( int opts );