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procset(4)
NAME
  procset.h - Send a signal to one or more processes

SYNOPSIS
  typedef struct procset {
	  idop_t  *p_op;
	  idtype_t p_lidtype;
	  id_t	   p_lid;
	  idtype_t p_ridtype;
	  id_t	   p_rid;
  } procset_t;

DESCRIPTION
  The contents of the <procset.h> structure define a set of target processes
  based on logical operations performed on the two sets of potential target
  processes indicated by the two pairs of id + type parameters, which
  designate "left" and "right" groups of processes.  The logical operations
  supported are the union, intersection, difference, and exclusive OR of the
  left and right groups.

  The p_lid and p_lidtype members define one set of potential target
  processes, the "left" set.  The p_rid and p_ridtype members define the
  "right" set of potential target processes.  These parameters work together
  to select the target process or processes.

  The value of p_op is used to combine these two groups into the final group
  of actual target processes:

  POP_DIFF  Specifies that the target group of processes consist of the
	    remaining processes in the left set that are not common to the
	    right set.

  POP_AND   Specifies that the target group consists of those processes that
	    are in both sets.

  POP_OR    Specifies that the target group consists of those processes that
	    are in either set, or in both sets.

  POP_XOR   Specifies that the target group consists of those processes that
	    are in either set, but not in both sets.

RELATED INFORMATION
  Functions: priocntlset(2), sigsend(2).

  Files: signal.h(4).