Copyright (c) 1980, 1991, 1993
The Regents of the University of California. All rights reserved.
Redistribution and use in source and binary forms, with or without
modification, are permitted provided that the following conditions
are met:
1. Redistributions of source code must retain the above copyright
notice, this list of conditions and the following disclaimer.
2. Redistributions in binary form must reproduce the above copyright
notice, this list of conditions and the following disclaimer in the
documentation and/or other materials provided with the distribution.
3. All advertising materials mentioning features or use of this software
must display the following acknowledgement:
This product includes software developed by the University of
California, Berkeley and its contributors.
4. Neither the name of the University nor the names of its contributors
may be used to endorse or promote products derived from this software
without specific prior written permission.
THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
SUCH DAMAGE.
@(#)time.1 8.1 (Berkeley) 6/6/93
.Dd June 6, 1993 .Dt TIME 1 .Os .Sh NAME .Nm time .Nd time command execution .Sh SYNOPSIS .Nm .Op Fl lp .Ar utility .Sh DESCRIPTION The .Nm utility executes and times .Ar utility . After the .Ar utility finishes, .Nm writes the total time elapsed, the time consumed by system overhead, and the time used to execute .Ar utility to the standard error stream. Times are reported in seconds.
p Available options: l -tag -width Ds t Fl l The contents of the .Em rusage structure are printed. t Fl p The output is formatted as specified by .St -p1003.2-92 . .El
p Some shells may provide a builtin .Nm command which is similar or identical to this utility. Consult the .Xr builtin 1 manual page. .Sh DIAGNOSTICS The .Nm utility shall exit with one of the following values: l -tag -width indent t 1-125 An error occurred in the .Nm utility. t 126 The .Ar utility was found but could not be invoked. t 127 The .Ar utility could not be found. .El
p Otherwise, the exit status of .Nm shall be that of .Ar utility . .Sh SEE ALSO .Xr builtin 1 , .Xr csh 1 , .Xr getrusage 2 .Sh FILES l -tag -width /usr/include/sys/resource.h -compact t Pa /usr/include/sys/resource.h .El .Sh STANDARDS The .Nm utility conforms to .St -p1003.2-92 . .Sh BUGS The granularity of seconds on microprocessors is crude and can result in times being reported for CPU usage which are too large by a second.