Minix2.0/man/man2/times.2

.\" Copyright (c) 1980 Regents of the University of California.
.\" All rights reserved.  The Berkeley software License Agreement
.\" specifies the terms and conditions for redistribution.
.\"
.\"	@(#)times.3c	6.1 (Berkeley) 5/9/85
.\"
.TH TIMES 2 "May 9, 1985"
.UC 4
.SH NAME
times \- get process times
.SH SYNOPSIS
.nf
.ft B
#include <sys/types.h>
#include <sys/times.h>
#include <time.h>

int times(struct tms *\fIbuffer\fP)
.fi
.SH DESCRIPTION
.B Times
returns time-accounting information
for the current process
and for the terminated child processes
of the current process.
All times are in 1/CLOCKS_PER_SEC seconds.
.PP
This is the structure returned by
.BR times :
.PP
.RS
.nf
.ta +0.4i +0.8i +1.2i
struct tms {
	clock_t	tms_utime;	/* user time for this process */
	clock_t	tms_stime;	/* system time for this process */
	clock_t	tms_cutime;	/* children's user time */
	clock_t	tms_cstime;	/* children's system time */
};
.fi
.RE
.PP
The user time is the number of clock ticks used by a process on
its own computations.  The system time is the number of clock ticks
spent inside the kernel on behalf of a process.  This does not
include time spent waiting for I/O to happen, only actual CPU
instruction times.
.PP
The children times are the sum
of the children's process times and
their children's times.
.SH RETURN
.B Times
returns 0 on success, otherwise \-1 with the error code stored into the
global variable
.BR errno .
.SH ERRORS
The following error code may be set in
.BR errno :
.TP 15
[EFAULT]
The address specified by the
.I buffer
parameter is not in a valid part of the process address space.
.SH "SEE ALSO"
.BR time (1),
.BR wait (2),
.BR time (2).