Merge from vendor branch BZIP:
[dragonfly.git] / lib / libc / gen / time.3
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1.\" Copyright (c) 1989, 1991, 1993
2.\" The Regents of the University of California. All rights reserved.
3.\"
4.\" This code is derived from software contributed to Berkeley by
5.\" the American National Standards Committee X3, on Information
6.\" Processing Systems.
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9.\" modification, are permitted provided that the following conditions
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16.\" 3. All advertising materials mentioning features or use of this software
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18.\" This product includes software developed by the University of
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24.\" THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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35.\"
36.\" @(#)time.3 8.1 (Berkeley) 6/4/93
37.\" $FreeBSD: src/lib/libc/gen/time.3,v 1.5.2.5 2001/12/14 18:33:51 ru Exp $
1de703da 38.\" $DragonFly: src/lib/libc/gen/time.3,v 1.2 2003/06/17 04:26:42 dillon Exp $
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39.\"
40.Dd June 4, 1993
41.Dt TIME 3
42.Os
43.Sh NAME
44.Nm time
45.Nd get time of day
46.Sh LIBRARY
47.Lb libc
48.Sh SYNOPSIS
49.In time.h
50.Ft time_t
51.Fn time "time_t *tloc"
52.Sh DESCRIPTION
53The
54.Fn time
55function
56returns the value of time in seconds since 0 hours, 0 minutes,
570 seconds, January 1, 1970, Coordinated Universal Time.
58.Pp
59A copy of the time value may be saved to the area indicated by the
60pointer
61.Fa tloc .
62If
63.Fa tloc
64is a NULL pointer, no value is stored.
65.Pp
66Upon successful completion,
67.Fn time
68returns the value of time.
69Otherwise a value of
70.Pq Po Vt time_t Pc \-1
71is returned and the global variable
72.Va errno
73is set to indicate the error.
74.Sh ERRORS
75The following error codes may be set in
76.Va errno :
77.Bl -tag -width Er
78.It Bq Er EFAULT
79An argument address referenced invalid memory.
80.El
81.Sh SEE ALSO
82.Xr gettimeofday 2 ,
83.Xr ctime 3
84.Sh HISTORY
85A
86.Fn time
87function appeared in
88.At v6 .