1.\" Copyright (c) 1990, 1991, 1993 2.\" The Regents of the University of California. All rights reserved. 3.\" 4.\" Redistribution and use in source and binary forms, with or without 5.\" modification, are permitted provided that the following conditions 6.\" are met: 7.\" 1. Redistributions of source code must retain the above copyright 8.\" notice, this list of conditions and the following disclaimer. 9.\" 2. Redistributions in binary form must reproduce the above copyright 10.\" notice, this list of conditions and the following disclaimer in the 11.\" documentation and/or other materials provided with the distribution. 12.\" 4. Neither the name of the University nor the names of its contributors 13.\" may be used to endorse or promote products derived from this software 14.\" without specific prior written permission. 15.\" 16.\" THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 17.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 18.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 19.\" ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 20.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 21.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 22.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 23.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 24.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 25.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 26.\" SUCH DAMAGE. 27.\" 28.\" @(#)times.3 8.1 (Berkeley) 6/4/93 29.\" $FreeBSD$ 30.\" 31.Dd December 1, 2008 32.Dt TIMES 3 33.Os 34.Sh NAME 35.Nm times 36.Nd process times 37.Sh LIBRARY 38.Lb libc 39.Sh SYNOPSIS 40.In sys/times.h 41.Ft clock_t 42.Fn times "struct tms *tp" 43.Sh DESCRIPTION 44.Bf -symbolic 45This interface is obsoleted by 46.Xr getrusage 2 47and 48.Xr gettimeofday 2 . 49.Ef 50.Pp 51The 52.Fn times 53function returns the value of time in 54.Dv CLK_TCK Ns 's 55of a second since the system startup time. 56The current value of 57.Dv CLK_TCK , 58the frequency of the statistics clock in ticks per second, may be 59obtained through the 60.Xr sysconf 3 61interface. 62.Pp 63It also fills in the structure pointed to by 64.Fa tp 65with time-accounting information. 66.Pp 67The 68.Vt tms 69structure is defined as follows: 70.Bd -literal -offset indent 71struct tms { 72 clock_t tms_utime; 73 clock_t tms_stime; 74 clock_t tms_cutime; 75 clock_t tms_cstime; 76}; 77.Ed 78.Pp 79The elements of this structure are defined as follows: 80.Bl -tag -width ".Va tms_cutime" 81.It Va tms_utime 82The 83.Tn CPU 84time charged for the execution of user instructions. 85.It Va tms_stime 86The 87.Tn CPU 88time charged for execution by the system on behalf of 89the process. 90.It Va tms_cutime 91The sum of the 92.Va tms_utime Ns s 93and 94.Va tms_cutime Ns s 95of the child processes. 96.It Va tms_cstime 97The sum of the 98.Fa tms_stime Ns s 99and 100.Fa tms_cstime Ns s 101of the child processes. 102.El 103.Pp 104All times are in 105.Dv CLK_TCK Ns 's 106of a second. 107.Pp 108The times of a terminated child process are included in the 109.Va tms_cutime 110and 111.Va tms_cstime 112elements of the parent when one of the 113.Xr wait 2 114functions returns the process ID of the terminated child to the parent. 115If an error occurs, 116.Fn times 117returns the value 118.Pq Po Vt clock_t Pc Ns \-1 , 119and sets 120.Va errno 121to indicate the error. 122.Sh ERRORS 123The 124.Fn times 125function 126may fail and set the global variable 127.Va errno 128for any of the errors specified for the library 129routines 130.Xr getrusage 2 131and 132.Xr gettimeofday 2 . 133.Sh SEE ALSO 134.Xr time 1 , 135.Xr getrusage 2 , 136.Xr gettimeofday 2 , 137.Xr wait 2 , 138.Xr sysconf 3 , 139.Xr clocks 7 140.Sh STANDARDS 141The 142.Fn times 143function 144conforms to 145.St -p1003.1-88 . 146