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System Calls                                       priocntlset(2)



NAME
     priocntlset - generalized process scheduler control

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

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

DESCRIPTION
     The priocntlset() function changes the scheduling properties
     of  running  processes. priocntlset() has the same functions
     as the priocntl() function, but a more general way of speci-
     fying  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 struc-
     tures.

     psp is a pointer to a procset structure, which priocntlset()
     uses  to  specify the set of processes whose scheduling pro-
     perties are to be changed. The  procset  structure  contains
     the following members:

     idop_t    p_op;        /* operator connecting left/right sets */
     idtype_t  p_lidtype;   /* left set ID type */
     id_t      p_lid;       /* left set ID */
     idtype_t  p_ridtype;   /* right set ID type */
     id_t      p_rid;       /* right set ID */

     The p_lidtype and p_lid members specify the ID type  and  ID
     of  one  ("left")  set of processes; the p_ridtype and p_rid
     members specify the ID type and ID of a second ("right") set
     of processes. ID types and IDs are specified just as for the
     priocntl() function. The p_op member specifies the operation
     to  be performed on the two sets of processes to get the set
     of processes the function is to apply to. The  valid  values
     for p_op and the processes they specify are:

      POP_DIFF
           Set difference: processes in left set and not in right
           set.

     POP_AND
           Set intersection: processes in  both  left  and  right
           sets.




SunOS 5.9           Last change: 29 Jul 1991                    1






System Calls                                       priocntlset(2)



     POP_OR
           Set union: processes in either left or right  sets  or
           both.

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

     The following macro, which is defined in <procset.h>, offers
     a convenient way to initialize a procset structure:

     #define  setprocset(psp, op, ltype, lid, rtype, rid) \
     (psp)->p_op       = (op), \
     (psp)->p_lidtype  = (ltype), \
     (psp)->p_lid      = (lid), \
     (psp)->p_ridtype  = (rtype), \
     (psp)->p_rid      = (rid),


RETURN VALUES
     Unless otherwise noted above,  priocntlset()  returns  0  on
     success. Otherwise, it returns -1 and sets errno to indicate
     the error.

ERRORS
     The priocntlset() function will fail if:

      EAGAIN
           An attempt to change the class  of  a  process  failed
           because  of  insufficient  resources other than memory
           (for example, class-specific kernel data structures).

     EFAULT
           One of the arguments points to an illegal address.

     EINVAL
           The argument cmd was invalid, an invalid or  unconfig-
           ured  class  was  specified,  or one of the parameters
           specified was invalid.

     ENOMEM
           An attempt to change the class  of  a  process  failed
           because of insufficient memory.

     EPERM The effective user  of  the  calling  process  is  not
           super-user.

     ERANGE
           The requested time quantum is out of range.

     ESRCH None of the specified processes exist.




SunOS 5.9           Last change: 29 Jul 1991                    2






System Calls                                       priocntlset(2)



SEE ALSO
     priocntl(1), priocntl(2)





















































SunOS 5.9           Last change: 29 Jul 1991                    3