1.\" $OpenBSD: time.1,v 1.10 2000/03/11 21:40:04 aaron 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. All advertising materials mentioning features or use of this software 16.\" must display the following acknowledgement: 17.\" This product includes software developed by the University of 18.\" California, Berkeley and its contributors. 19.\" 4. Neither the name of the University nor the names of its contributors 20.\" may be used to endorse or promote products derived from this software 21.\" without specific prior written permission. 22.\" 23.\" THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 24.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 25.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 26.\" ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 27.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 28.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 29.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 30.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 31.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 32.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 33.\" SUCH DAMAGE. 34.\" 35.\" @(#)time.1 8.1 (Berkeley) 6/6/93 36.\" 37.Dd June 6, 1993 38.Dt TIME 1 39.Os 40.Sh NAME 41.Nm time 42.Nd time command execution 43.Sh SYNOPSIS 44.Nm time 45.Op Fl lp 46.Ar utility 47.Sh DESCRIPTION 48.Nm 49executes and 50times 51.Ar utility . 52After the 53.Ar utility 54finishes, 55.Nm 56writes the total time elapsed, 57the time consumed by system overhead, 58and the time used to execute 59.Ar utility 60to the standard error stream. 61Times are reported in seconds. 62.Pp 63The options are as follows: 64.Bl -tag -width Ds 65.It Fl l 66The contents of the 67.Em rusage 68structure are printed. 69.It Fl p 70The output is formatted as specified by 71.St -p1003.2-92 . 72.El 73.Pp 74.Xr csh 1 75has its own and syntactically different built-in version of 76.Nm time . 77The utility described here 78is available as 79.Pa /usr/bin/time 80to 81.Xr csh 82users. 83.Pp 84The 85.Nm 86utility shall exit with one of the following values: 87.Pp 88.Bl -tag -width indent -compact 89.It 1\-125 90An error occurred in the 91.Nm 92utility. 93.It 126 94The 95.Ar utility 96was found but could not be invoked. 97.It 127 98The 99.Ar utility 100could not be found. 101.El 102.Pp 103Otherwise, the exit status of 104.Nm 105shall be that of 106.Ar utility . 107.Sh FILES 108.Bl -tag -width /usr/include/sys/resource.h -compact 109.It Pa /usr/include/sys/resource.h 110.El 111.Sh SEE ALSO 112.Xr csh 1 , 113.Xr getrusage 2 114.Sh STANDARDS 115The 116.Nm 117utility conforms to 118.St -p1003.2-92 . 119.Sh HISTORY 120A 121.Nm 122command appeared in 123.At v6 . 124.Sh BUGS 125The granularity of seconds on microprocessors is crude and 126can result in times being reported for CPU usage which are too large by 127a second. 128