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: src/lib/libc/gen/times.3,v 1.12 2008/12/01 15:27:00 keramida Exp $ 30.\" $DragonFly: src/lib/libc/gen/times.3,v 1.2 2003/06/17 04:26:42 dillon Exp $ 31.\" 32.Dd December 1, 2008 33.Dt TIMES 3 34.Os 35.Sh NAME 36.Nm times 37.Nd process times 38.Sh LIBRARY 39.Lb libc 40.Sh SYNOPSIS 41.In sys/times.h 42.Ft clock_t 43.Fn times "struct tms *tp" 44.Sh DESCRIPTION 45.Bf -symbolic 46This interface is obsoleted by 47.Xr getrusage 2 48and 49.Xr gettimeofday 2 . 50.Ef 51.Pp 52The 53.Fn times 54function returns the value of time in 55.Dv CLK_TCK Ns 's 56of a second since the system startup time. 57The current value of 58.Dv CLK_TCK , 59the frequency of the statistics clock in ticks per second, may be 60obtained through the 61.Xr sysconf 3 62interface. 63.Pp 64It also fills in the structure pointed to by 65.Fa tp 66with time-accounting information. 67.Pp 68The 69.Vt tms 70structure is defined as follows: 71.Bd -literal -offset indent 72struct tms { 73 clock_t tms_utime; 74 clock_t tms_stime; 75 clock_t tms_cutime; 76 clock_t tms_cstime; 77}; 78.Ed 79.Pp 80The elements of this structure are defined as follows: 81.Bl -tag -width ".Va tms_cutime" 82.It Va tms_utime 83The 84.Tn CPU 85time charged for the execution of user instructions. 86.It Va tms_stime 87The 88.Tn CPU 89time charged for execution by the system on behalf of 90the process. 91.It Va tms_cutime 92The sum of the 93.Va tms_utime Ns s 94and 95.Va tms_cutime Ns s 96of the child processes. 97.It Va tms_cstime 98The sum of the 99.Fa tms_stime Ns s 100and 101.Fa tms_cstime Ns s 102of the child processes. 103.El 104.Pp 105All times are in 106.Dv CLK_TCK Ns 's 107of a second. 108.Pp 109The times of a terminated child process are included in the 110.Va tms_cutime 111and 112.Va tms_cstime 113elements of the parent when one of the 114.Xr wait 2 115functions returns the process ID of the terminated child to the parent. 116If an error occurs, 117.Fn times 118returns the value 119.Pq Po Vt clock_t Pc Ns \-1 , 120and sets 121.Va errno 122to indicate the error. 123.Sh ERRORS 124The 125.Fn times 126function 127may fail and set the global variable 128.Va errno 129for any of the errors specified for the library 130routines 131.Xr getrusage 2 132and 133.Xr gettimeofday 2 . 134.Sh SEE ALSO 135.Xr time 1 , 136.Xr getrusage 2 , 137.Xr gettimeofday 2 , 138.Xr wait 2 , 139.Xr sysconf 3 , 140.Xr clocks 7 141.Sh STANDARDS 142The 143.Fn times 144function 145conforms to 146.St -p1003.1-88 . 147