priocntlset(2)                                               priocntlset(2)

NAME
     priocntlset, setprocset - control process scheduling

SYNOPSIS
     #include <sys/types.h>
     #include <sys/procset.h>
     #include <sys/priocntl.h>
     #include <sys/rtpriocntl.h>
     #include <sys/tspriocntl.h>

     long priocntlset(procsett *psp, int cmd, ... /* arg */);

DESCRIPTION
     priocntlset() changes the scheduling properties of running processes.
     priocntlset() has the same functions as the priocntl() system call,
     but a more general way of specifying the set of processes whose
     scheduling properties are to be changed.

     cmd specifies the function to be performed. arg is a pointer to a
     structure whose type depends on cmd. See priocntl(2) for the valid
     values of cmd and the corresponding arg structures.

     psp is a pointer to a procset structure, which priocntlset() uses to
     specify the set of processes whose scheduling properties are to be
     changed.

     typedef struct procset {
       idopt    pop;       /* operator connecting left/right sets */
       idtypet  plidtype;  /* left set ID type */
       idt      plid;      /* left set ID */
       idtypet  pridtype;  /* right set ID type */
       idt      prid;      /* right set ID */
     } procsett;

     plidtype and plid specify the ID type and ID of one ("left") set of
     processes; pridtype and prid specify the ID type and ID of a second
     ("right") set of processes. ID types and IDs are specified just as for
     the priocntl() system call. pop specifies the operation to be per-
     formed on the two sets of processes to get the set of processes the
     system call is to apply to. The valid values for pop and the
     processes they specify are:

     POPDIFF
          Set difference: processes in left set and not in right set

     POPAND
          Set intersection: processes in both left and right sets

     POPOR
          Set union: processes in either left or right sets or both





Page 1                       Reliant UNIX 5.44                Printed 11/98

priocntlset(2)                                               priocntlset(2)

     POPXOR
          Set exclusive-or: processes in left or right set but not in both

     The following macro, which is defined in procset.h, offers a con-
     venient way to initialize a procset structure:

     #define       setprocset(psp, op, ltype, lid, rtype, rid) \
     (psp)->pop       = (op), \
     (psp)->plidtype  = (ltype), \
     (psp)->plid      = (lid), \
     (psp)->pridtype  = (rtype), \
     (psp)->prid      = (rid),

RESULT
     priocntlset() has the same results and errors as priocntl().

SEE ALSO
     priocntl(1), priocntl(2).




































Page 2                       Reliant UNIX 5.44                Printed 11/98