|File: [cvs.NetBSD.org] / src / lib / libc / gen / time.3 (download)
Revision 1.16, Sat Nov 5 18:17:29 2011 UTC (2 years, 4 months ago) by christos
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Changes since 1.15: +3 -8
there no errors defined for time.
.\" $NetBSD: time.3,v 1.16 2011/11/05 18:17:29 christos Exp $
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.\" @(#)time.3 8.1 (Berkeley) 6/4/93
.Dd November 5, 2011
.Dt TIME 3
.Nd get time of day
.Fn time "time_t *tloc"
returns the value of time in seconds since 0 hours, 0 minutes,
0 seconds, January 1, 1970, Coordinated Universal Time.
A copy of the time value may be saved to the area indicated by the
.Fa tloc .
pointer, no value is stored.
Upon successful completion,
returns the value of time.
Otherwise a value of
.Po Fa time_t Pc \-1
is returned and the global variable
is set to indicate the error.
No errors are defined.
.Sh SEE ALSO
.Xr gettimeofday 2 ,
.Xr ctime 3
function conforms to
.St -p1003.1-90 .
function appeared in
.At v2 .
It returned a 32-bit value measuring sixtieths of a second, leading to
rollover every 2.26 years.
.At v6 ,
the precision of
was changed to seconds, allowing 135.6 years between rollovers.
type was changed to be 64 bits wide, including on 32-bit machines,
making rollover a concern for the far distant future only.
Note however that any code making the incorrect assumption that
is the same as
will fail on 32-bit machines in 2038.