1.\"	$OpenBSD: time.1,v 1.13 2003/06/23 21:46:02 jmc Exp $
2.\"	$NetBSD: time.1,v 1.5 1994/12/08 09:36:57 jtc Exp $
3.\"
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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
44.Nm
45executes and
46times
47.Ar utility .
48After the
49.Ar utility
50finishes,
51.Nm
52writes the total time elapsed,
53the time consumed by system overhead,
54and the time used to execute
55.Ar utility
56to the standard error stream.
57Times are reported in seconds.
58.Pp
59The options are as follows:
60.Bl -tag -width Ds
61.It Fl l
62The contents of the
63.Em rusage
64structure are printed.
65.It Fl p
66The output is formatted as specified by
67.St -p1003.2-92 .
68.El
69.Pp
70The
71.Nm
72utility exists as a built-in to most shells,
73although they may be syntactically different.
74The utility described here is available as
75.Pa /usr/bin/time .
76.Pp
77The
78.Nm
79utility shall exit with one of the following values:
80.Pp
81.Bl -tag -width indent -compact
82.It 1\-125
83An error occurred in the
84.Nm
85utility.
86.It 126
87The
88.Ar utility
89was found but could not be invoked.
90.It 127
91The
92.Ar utility
93could not be found.
94.El
95.Pp
96Otherwise, the exit status of
97.Nm
98shall be that of
99.Ar utility .
100.Sh FILES
101.Bl -tag -width /usr/include/sys/resource.h -compact
102.It Pa /usr/include/sys/resource.h
103.El
104.Sh SEE ALSO
105.Xr csh 1 ,
106.Xr sh 1 ,
107.Xr getrusage 2
108.Sh STANDARDS
109The
110.Nm
111utility conforms to
112.St -p1003.2-92 .
113.Sh HISTORY
114A
115.Nm
116command appeared in
117.At v3 .
118.Sh BUGS
119The granularity of seconds on microprocessors is crude and
120can result in times being reported for CPU usage which are too large by
121a second.
122