/*
 * Sample program for times system call  - No.43
 *
 * times(2) - get process times
 *
 * Synopsis
 *     #include <sys/times.h>
 *
 *     clock_t times(struct tms *buf);
 *
 * Description
 *     The times() function stores the current process times in
 *     the struct tms that buf points to. The struct tms is as
 *     defined in <sys/times.h>
 *
 *     typedef long int clock_t;
 *
 *     struct tms {
 *         clock_t tms_utime; * user time *
 *         clock_t tms_stime; * system time *
 *         clock_t tms_cutime; * user time of children *
 *         clock_t tms_cstime; * system time of children *
 *     };
 *
 *     The tms_utime field contains the CPU time spent executing
 *     instructions of the calling process. The tms_stime field
 *     contains the CPU time spent in the system while executing
 *     field contains the sum of the tms_time and tms_cutime values
 *     vor all waited-for terminated children. The tms_cstime field
 *     contains the sum of the  tms_stime and tms_cstime values for
 *     all waited-for terminated children.
 *
 *     Times for terminated children (and their descendants) is
 *     added in at the moment wait(2) or waitpid(2) returns their
 *     process ID. In particular, times of grandchildren that the
 *     children did not wait fro are never seen.
 *
 *     All times reported are in clock ticks.
 */

#include <stdio.h>
#include <sys/times.h>

main()
{
	struct tms tm_start, tm_end;
	int i;

	times(&tm_start);
	for (i = 0; i < 10000000; i++);
	times(&tm_end);
	printf("%ld ticks.\n", tm_end.tms_utime - tm_start.tms_utime);

	exit(0);
}