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[unix-history] / usr / src / lib / libc / gen / time.3

.\" Copyright (c) 1989, 1991 The Regents of the University of California.
.\" All rights reserved.
.\"
.\" This code is derived from software contributed to Berkeley by
.\" the American National Standards Committee X3, on Information
.\" Processing Systems.
.\"
.\" %sccs.include.redist.man%
.\"
.\"     @(#)time.3	5.4 (Berkeley) %G%
.\"
.Dd 
.Dt TIME 3
.Os BSD 4
.Sh NAME
.Nm time
.Nd get time of day
.Sh SYNOPSIS
.Fd #include <sys/types.h>
.Ft time_t
.Fn time "time_t *tloc"
.Sh DESCRIPTION
The
.Fn time
function
returns the value of time in seconds since 0 hours, 0 minutes,
0 seconds, January 1, 1970, Coordinated Universal Time.
.Pp
A copy of the time value may be saved to the area indicated by the
pointer
.Fa tloc .
If
.Fa tloc
is a NULL pointer, no value is stored.
.Pp
Upon successful completion,
.Fn time
returns the value of time.
Otherwise a value of
.Po
.Po Fa time_t Pc \-1
.Pc
is returned and the global variable
.Va errno
is set to indicate the error.
.Sh ERRORS
The following error codes may be set in
.Va errno :
.Bl -tag -width [EFAULT]
.It Bq Er EFAULT
An argument address referenced invalid memory.
.Sh SEE ALSO
.Xr gettimeofday 2 ,
.Xr ctime 3
.Sh HISTORY
A
.Fn time
function appeared in
.At v6 .