/*
 * Copyright 2005 Sun Microsystems, Inc.  All rights reserved.
 * Use is subject to license terms.
 *
 * This D script is used as an example in the Solaris Dynamic Tracing Guide
 * wiki in the "proc Provider" Chapter.
 *
 * The full text of the this chapter may be found here:
 *
 *   http://docs.oracle.com/cd/E36784_01/html/E36846/proc-provider.html
 *
 * On machines that have DTrace installed, this script is available as
 * whoexec.d in /usr/demo/dtrace, a directory that contains all D scripts
 * used in the Solaris Dynamic Tracing Guide.  A table of the scripts and their
 * corresponding chapters may be found here:
 *
 *   file:///usr/demo/dtrace/index.html
 */

#pragma D option quiet

proc:::exec
{
        self->parent = execname;
}

proc:::exec-success
/self->parent != NULL/
{
	@[self->parent, execname] = count();
	self->parent = NULL;
}

proc:::exec-failure
/self->parent != NULL/
{
	self->parent = NULL;
}

END
{
	printf("%-20s %-20s %s\n", "WHO", "WHAT", "COUNT");
	printa("%-20s %-20s %@d\n", @);
}