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