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.Dd December 1, 2008 29.Dt TIMES 3 30.Os 31.Sh NAME 32.Nm times 33.Nd process times 34.Sh LIBRARY 35.Lb libc 36.Sh SYNOPSIS 37.In sys/times.h 38.Ft clock_t 39.Fn times "struct tms *tp" 40.Sh DESCRIPTION 41.Bf -symbolic 42This interface is obsoleted by 43.Xr getrusage 2 44and 45.Xr gettimeofday 2 . 46.Ef 47.Pp 48The 49.Fn times 50function returns the value of time in 51.Dv CLK_TCK Ns 's 52of a second since the system startup time. 53The current value of 54.Dv CLK_TCK , 55the frequency of the statistics clock in ticks per second, may be 56obtained through the 57.Xr sysconf 3 58interface. 59.Pp 60It also fills in the structure pointed to by 61.Fa tp 62with time-accounting information. 63.Pp 64The 65.Vt tms 66structure is defined as follows: 67.Bd -literal -offset indent 68struct tms { 69 clock_t tms_utime; 70 clock_t tms_stime; 71 clock_t tms_cutime; 72 clock_t tms_cstime; 73}; 74.Ed 75.Pp 76The elements of this structure are defined as follows: 77.Bl -tag -width ".Va tms_cutime" 78.It Va tms_utime 79The 80.Tn CPU 81time charged for the execution of user instructions. 82.It Va tms_stime 83The 84.Tn CPU 85time charged for execution by the system on behalf of 86the process. 87.It Va tms_cutime 88The sum of the 89.Va tms_utime Ns s 90and 91.Va tms_cutime Ns s 92of the child processes. 93.It Va tms_cstime 94The sum of the 95.Fa tms_stime Ns s 96and 97.Fa tms_cstime Ns s 98of the child processes. 99.El 100.Pp 101All times are in 102.Dv CLK_TCK Ns 's 103of a second. 104.Pp 105The times of a terminated child process are included in the 106.Va tms_cutime 107and 108.Va tms_cstime 109elements of the parent when one of the 110.Xr wait 2 111functions returns the process ID of the terminated child to the parent. 112If an error occurs, 113.Fn times 114returns the value 115.Pq Po Vt clock_t Pc Ns \-1 , 116and sets 117.Va errno 118to indicate the error. 119.Sh ERRORS 120The 121.Fn times 122function 123may fail and set the global variable 124.Va errno 125for any of the errors specified for the library 126routines 127.Xr getrusage 2 128and 129.Xr gettimeofday 2 . 130.Sh SEE ALSO 131.Xr time 1 , 132.Xr getrusage 2 , 133.Xr gettimeofday 2 , 134.Xr wait 2 , 135.Xr sysconf 3 , 136.Xr clocks 7 137.Sh STANDARDS 138The 139.Fn times 140function 141conforms to 142.St -p1003.1-88 . 143