1.\" $OpenBSD: time.1,v 1.18 2009/02/08 17:15:10 jmc Exp $ 2.\" $NetBSD: time.1,v 1.5 1994/12/08 09:36:57 jtc Exp $ 3.\" 4.\" Copyright (c) 1980, 1991, 1993 5.\" The Regents of the University of California. All rights reserved. 6.\" 7.\" Redistribution and use in source and binary forms, with or without 8.\" modification, are permitted provided that the following conditions 9.\" are met: 10.\" 1. Redistributions of source code must retain the above copyright 11.\" notice, this list of conditions and the following disclaimer. 12.\" 2. Redistributions in binary form must reproduce the above copyright 13.\" notice, this list of conditions and the following disclaimer in the 14.\" documentation and/or other materials provided with the distribution. 15.\" 3. Neither the name of the University nor the names of its contributors 16.\" may be used to endorse or promote products derived from this software 17.\" without specific prior written permission. 18.\" 19.\" THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 20.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 21.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 22.\" ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 23.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 24.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 25.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 26.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 27.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 28.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 29.\" SUCH DAMAGE. 30.\" 31.\" @(#)time.1 8.1 (Berkeley) 6/6/93 32.\" 33.Dd $Mdocdate: February 8 2009 $ 34.Dt TIME 1 35.Os 36.Sh NAME 37.Nm time 38.Nd time command execution 39.Sh SYNOPSIS 40.Nm time 41.Op Fl lp 42.Ar utility 43.Sh DESCRIPTION 44.Nm 45executes and 46times 47.Ar utility . 48After the 49.Ar utility 50finishes, 51.Nm 52writes the total time elapsed, 53the time consumed by system overhead, 54and the time used to execute 55.Ar utility 56to the standard error stream. 57Times are reported in seconds. 58.Pp 59The options are as follows: 60.Bl -tag -width Ds 61.It Fl l 62The contents of the 63.Em rusage 64structure are printed. 65.It Fl p 66The output is formatted as specified by 67.St -p1003.2-92 . 68.El 69.Pp 70The 71.Nm 72utility shall exit with one of the following values: 73.Pp 74.Bl -tag -width indent -compact 75.It 1\-125 76An error occurred in the 77.Nm 78utility. 79.It 126 80The 81.Ar utility 82was found but could not be invoked. 83.It 127 84The 85.Ar utility 86could not be found. 87.El 88.Pp 89Otherwise, the exit status of 90.Nm 91shall be that of 92.Ar utility . 93.Sh FILES 94.Bl -tag -width /usr/include/sys/resource.h -compact 95.It Pa /usr/include/sys/resource.h 96.El 97.Sh SEE ALSO 98.Xr csh 1 , 99.Xr ksh 1 , 100.Xr getrusage 2 101.Sh STANDARDS 102The 103.Nm 104utility is compliant with the 105.St -p1003.1-2008 106specification. 107.Pp 108The flag 109.Op Fl l 110is an extension to that specification. 111.Pp 112.Nm 113also exists as a built-in to 114.Xr csh 1 115and 116.Xr ksh 1 , 117though with a different syntax. 118.Sh HISTORY 119A 120.Nm 121command appeared in 122.At v3 . 123.Sh BUGS 124The granularity of seconds on microprocessors is crude and 125can result in times being reported for CPU usage which are too large by 126a second. 127