1.\" Copyright (c) 1980, 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. All advertising materials mentioning features or use of this software 13.\" must display the following acknowledgement: 14.\" This product includes software developed by the University of 15.\" California, Berkeley and its contributors. 16.\" 4. Neither the name of the University nor the names of its contributors 17.\" may be used to endorse or promote products derived from this software 18.\" without specific prior written permission. 19.\" 20.\" THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 21.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 22.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 23.\" ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 24.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 25.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 26.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 27.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 28.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 29.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 30.\" SUCH DAMAGE. 31.\" 32.\" @(#)time.1 8.1 (Berkeley) 6/6/93 33.\" $FreeBSD$ 34.\" 35.Dd June 6, 1993 36.Dt TIME 1 37.Os BSD 4 38.Sh NAME 39.Nm time 40.Nd time command execution 41.Sh SYNOPSIS 42.Nm 43.Op Fl al 44.Op Fl h | Fl p 45.Op Fl o Ar file 46.Ar command 47.Sh DESCRIPTION 48The 49.Nm 50utility 51executes and 52times 53.Ar command 54by initiating a timer and passing the 55.Ar command 56to the 57shell. 58After the 59.Ar command 60finishes, 61.Nm 62writes to the standard error stream, 63(in seconds): 64the total time elapsed, 65the time used to execute the 66.Ar command 67process and the time consumed by system overhead. 68.Pp 69Available options: 70.Bl -tag -width Ds 71.It Fl a 72If the 73.Fl o 74flag is used, append to the specified file rather than overwriting 75it. 76Otherwise, this option has no effect. 77.It Fl h 78Print times in a human friendly format. Times are printed in minutes, hours, 79etc. as appropiate. 80.It Fl l 81The contents of the 82.Em rusage 83structure are printed as well. 84.It Fl o Ar file 85Write the output to 86.Ar file 87instead of stderr. If 88.Ar file 89exists and the 90.Fl a 91flag is not specified, the file will be overwritten. 92.It Fl p 93Makes 94.Nm 95output POSIX.2 compliant (each time is printed on its own line). 96.El 97.Pp 98Some shells may provide a builtin 99.Nm 100command which is similar or identical to this utility. 101Consult the 102.Xr builtin 1 103manual page. 104.Sh DIAGNOSTICS 105If 106.Ar command 107could be timed successfully, its exit status is returned. 108If 109.Ar command 110terminated abnormally, a warning message is output to stderr. 111If the 112.Ar command 113was found but could not be run, the exit status is 126. 114If no 115.Ar command 116could be found at all, the exit status is 127. 117If 118.Nm 119encounters any other error, the exit status is between 1 and 125 120included. 121.Sh SEE ALSO 122.Xr builtin 1 , 123.Xr csh 1 , 124.Xr getrusage 2 , 125.Xr wait 2 126.Sh STANDARDS 127The 128.Nm 129utility is expected to conform to ISO/IEC 9945-2:1993 (``POSIX''). 130.Sh HISTORY 131A 132.Nm 133command appeared in 134.At v6 . 135