time.1 revision 22319
Copyright (c) 1980, 1991, 1993
The Regents of the University of California. All rights reserved.
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This product includes software developed by the University of
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may be used to endorse or promote products derived from this software
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THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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@(#)time.1 8.1 (Berkeley) 6/6/93
.Dd June 6, 1993 .Dt TIME 1 .Os BSD 4 .Sh NAME .Nm time .Nd time command execution .Sh SYNOPSIS .Nm time .Op Fl l .Ar command .Sh DESCRIPTION The .Nm time utility executes and times .Ar command by initiating a timer and passing the .Ar command to the shell. After the .Ar command finishes, .Nm time writes to the standard error stream, (in seconds): the total time elapsed, time consumed by system overhead, and the time used to execute the .Ar command process.
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 BSD 4 .Sh NAME .Nm time .Nd time command execution .Sh SYNOPSIS .Nm time .Op Fl l .Ar command .Sh DESCRIPTION The .Nm time utility executes and times .Ar command by initiating a timer and passing the .Ar command to the shell. After the .Ar command finishes, .Nm time writes to the standard error stream, (in seconds): the total time elapsed, time consumed by system overhead, and the time used to execute the .Ar command process.
p Available options: l -tag -width Ds t Fl l The contents of the .Em rusage structure are printed as well. .El
p The .Xr csh 1 has its own and syntactically different builtin version of .Nm time. The command described here is available as
a /usr/bin/time to .Xr csh users. .Sh BUGS The granularity of seconds on micro processors is crude and can result in times being reported for CPU usage which are too large by a second. .Sh SEE ALSO .Xr csh 1 , .Xr getrusage 2 , .Xr wait 2 .Sh HISTORY A .Nm command appeared in .At v6 .