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 May 14, 2006 36.Dt TIME 1 37.Os 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 utility Op Ar argument ... 47.Sh DESCRIPTION 48The 49.Nm 50utility 51executes and 52times the specified 53.Ar utility . 54After the 55.Ar utility 56finishes, 57.Nm 58writes to the standard error stream, 59(in seconds): 60the total time elapsed, 61the time used to execute the 62.Ar utility 63process and the time consumed by system overhead. 64.Pp 65The following options are available: 66.Bl -tag -width indent 67.It Fl a 68If the 69.Fl o 70flag is used, append to the specified file rather than overwriting 71it. 72Otherwise, this option has no effect. 73.It Fl h 74Print times in a human friendly format. 75Times are printed in minutes, hours, 76etc.\& as appropriate. 77.It Fl l 78The contents of the 79.Em rusage 80structure are printed as well. 81.It Fl o Ar file 82Write the output to 83.Ar file 84instead of stderr. 85If 86.Ar file 87exists and the 88.Fl a 89flag is not specified, the file will be overwritten. 90.It Fl p 91Makes 92.Nm 93output POSIX.2 compliant (each time is printed on its own line). 94.El 95.Pp 96Some shells may provide a builtin 97.Nm 98command which is similar or identical to this utility. 99Consult the 100.Xr builtin 1 101manual page. 102.Pp 103If 104.Nm 105receives a 106.Dv SIGINFO 107(see the status argument for 108.Xr stty 1 ) 109signal, the current time the given command is running will be written to the 110standard output. 111.Sh ENVIRONMENT 112The 113.Ev PATH 114environment variable is used to locate the requested 115.Ar utility 116if the name contains no 117.Ql / 118characters. 119.Sh EXIT STATUS 120If 121.Ar utility 122could be timed successfully, its exit status is returned. 123If 124.Ar utility 125terminated abnormally, a warning message is output to stderr. 126If the 127.Ar utility 128was found but could not be run, the exit status is 126. 129If no 130.Ar utility 131could be found at all, the exit status is 127. 132If 133.Nm 134encounters any other error, the exit status is between 1 and 125 135included. 136.Sh SEE ALSO 137.Xr builtin 1 , 138.Xr csh 1 , 139.Xr getrusage 2 , 140.Xr wait 2 141.Sh STANDARDS 142The 143.Nm 144utility is expected to conform to ISO/IEC 9945-2:1993 (``POSIX''). 145.Sh HISTORY 146A 147.Nm 148utility appeared in 149.At v3 . 150