The <sys/times.h> header shall define the structure tms,
which is returned by times() and includes at least the following
members:
clock_t tms_utime User CPU time.
clock_t tms_stime System CPU time.
clock_t tms_cutime User CPU time of terminated child processes.
clock_t tms_cstime System CPU time of terminated child processes.
The clock_t type shall be defined as described in <sys/types.h>
.
The following shall be declared as a function and may also be defined
as a macro. A function prototype shall be provided.
clock_t times(struct tms *);
The following sections are informative.