priocntlset(2)							   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 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. 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.

       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 unconfigured 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 {PRIV_PROC_PRIOCNTL} privilege is not asserted in the effective set of the calling LWP.

		       The calling LWP does not have sufficient privileges to affect the target LWP.

       ERANGE	       The requested time quantum is out of range.

       ESRCH	       None of the specified processes exist.

SEE ALSO

       priocntl(1), priocntl(2)

SunOS 5.10							    1 Feb 2003							    priocntlset(2)