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Annotation of src/usr.bin/time/time.1, Revision 1.12

1.12    ! millert     1: .\"    $OpenBSD: time.1,v 1.11 2002/01/24 20:33:46 mickey Exp $
1.1       deraadt     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.
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                      7: .\" Redistribution and use in source and binary forms, with or without
                      8: .\" modification, are permitted provided that the following conditions
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                     10: .\" 1. Redistributions of source code must retain the above copyright
                     11: .\"    notice, this list of conditions and the following disclaimer.
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                     13: .\"    notice, this list of conditions and the following disclaimer in the
                     14: .\"    documentation and/or other materials provided with the distribution.
1.12    ! millert    15: .\" 3. Neither the name of the University nor the names of its contributors
1.1       deraadt    16: .\"    may be used to endorse or promote products derived from this software
                     17: .\"    without specific prior written permission.
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                     19: .\" THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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                     31: .\"     @(#)time.1     8.1 (Berkeley) 6/6/93
                     32: .\"
                     33: .Dd June 6, 1993
                     34: .Dt TIME 1
                     35: .Os
                     36: .Sh NAME
                     37: .Nm time
                     38: .Nd time command execution
                     39: .Sh SYNOPSIS
                     40: .Nm time
                     41: .Op Fl lp
                     42: .Ar utility
                     43: .Sh DESCRIPTION
1.7       aaron      44: .Nm
1.1       deraadt    45: executes and
                     46: times
                     47: .Ar utility .
                     48: After the
                     49: .Ar utility
                     50: finishes,
1.7       aaron      51: .Nm
1.1       deraadt    52: writes the total time elapsed,
                     53: the time consumed by system overhead,
1.7       aaron      54: and the time used to execute
                     55: .Ar utility
1.1       deraadt    56: to the standard error stream.
                     57: Times are reported in seconds.
                     58: .Pp
1.8       aaron      59: The options are as follows:
1.1       deraadt    60: .Bl -tag -width Ds
                     61: .It Fl l
                     62: The contents of the
                     63: .Em rusage
                     64: structure are printed.
                     65: .It Fl p
                     66: The output is formatted as specified by
                     67: .St -p1003.2-92 .
                     68: .El
                     69: .Pp
                     70: .Xr csh 1
1.5       aaron      71: has its own and syntactically different built-in version of
1.6       aaron      72: .Nm time .
1.1       deraadt    73: The utility described here
                     74: is available as
                     75: .Pa /usr/bin/time
                     76: to
                     77: .Xr csh
                     78: users.
1.10      aaron      79: .Pp
1.1       deraadt    80: The
1.7       aaron      81: .Nm
1.1       deraadt    82: utility shall exit with one of the following values:
1.10      aaron      83: .Pp
                     84: .Bl -tag -width indent -compact
1.7       aaron      85: .It 1\-125
                     86: An error occurred in the
                     87: .Nm
1.1       deraadt    88: utility.
                     89: .It 126
1.7       aaron      90: The
1.1       deraadt    91: .Ar utility
                     92: was found but could not be invoked.
                     93: .It 127
1.7       aaron      94: The
1.1       deraadt    95: .Ar utility
                     96: could not be found.
                     97: .El
                     98: .Pp
1.7       aaron      99: Otherwise, the exit status of
                    100: .Nm
                    101: shall be that of
1.1       deraadt   102: .Ar utility .
                    103: .Sh FILES
1.3       deraadt   104: .Bl -tag -width /usr/include/sys/resource.h -compact
                    105: .It Pa /usr/include/sys/resource.h
1.1       deraadt   106: .El
1.9       aaron     107: .Sh SEE ALSO
                    108: .Xr csh 1 ,
                    109: .Xr getrusage 2
1.1       deraadt   110: .Sh STANDARDS
                    111: The
                    112: .Nm
1.7       aaron     113: utility conforms to
1.1       deraadt   114: .St -p1003.2-92 .
1.9       aaron     115: .Sh HISTORY
                    116: A
                    117: .Nm
                    118: command appeared in
1.11      mickey    119: .At v3 .
1.1       deraadt   120: .Sh BUGS
                    121: The granularity of seconds on microprocessors is crude and
                    122: can result in times being reported for CPU usage which are too large by
                    123: a second.