b6cbf7203b
This patch imports the unmodified current version of NetBSD libc. The NetBSD includes are in /nbsd_include, while the libc code itself is split between lib/nbsd_libc and common/lib/libc.
75 lines
1.5 KiB
Groff
75 lines
1.5 KiB
Groff
.\" $NetBSD: offtime.3,v 1.2 2010/12/16 18:38:07 christos Exp $
|
|
.\" Written by Klaus Klein, May 10, 2004.
|
|
.\" Public domain.
|
|
.Dd December 14, 2010
|
|
.Dt OFFTIME 3
|
|
.Os
|
|
.Sh NAME
|
|
.Nm offtime ,
|
|
.Nm timeoff ,
|
|
.Nm timegm ,
|
|
.Nm timelocal
|
|
.Nd convert date and time
|
|
.Sh LIBRARY
|
|
.Lb libc
|
|
.Sh SYNOPSIS
|
|
.In time.h
|
|
.Ft struct tm *
|
|
.Fn offtime "const time_t * clock" "long int offset"
|
|
.Ft struct tm *
|
|
.Fn offtime_r "const time_t * clock" "long int offset" "struct tm *ret"
|
|
.Ft time_t
|
|
.Fn timeoff "struct tm * tm" "long int offset"
|
|
.Ft time_t
|
|
.Fn timegm "struct tm * tm"
|
|
.Ft time_t
|
|
.Fn timelocal "struct tm * tm"
|
|
.Sh DESCRIPTION
|
|
These functions are inspired by C standard interfaces named similarly.
|
|
.Pp
|
|
.Fn offtime
|
|
converts the calendar time
|
|
.Fa clock ,
|
|
offset by
|
|
.Fa offset
|
|
seconds,
|
|
into broken-down time, expressed as Coordinated Universal Time (UTC).
|
|
.Pp
|
|
.Fn offtime_r
|
|
is similar to
|
|
.Fn offtime
|
|
but it places the returned
|
|
.Ft "struct tm *"
|
|
in the user supplied
|
|
.Fa ret
|
|
argument.
|
|
.Pp
|
|
.Fn timeoff
|
|
converts the broken-down time
|
|
.Fa tm ,
|
|
expressed as UTC,
|
|
offset by
|
|
.Fa offset
|
|
seconds,
|
|
into a calendar time value.
|
|
.Pp
|
|
.Fn timegm
|
|
converts the broken-down time
|
|
.Fa tm
|
|
into a calendar time value, effectively being the inverse of
|
|
.Xr gmtime 3 .
|
|
It is equivalent to the C standard function
|
|
.Xr mktime 3
|
|
operating in UTC.
|
|
.Pp
|
|
.Fn timelocal
|
|
converts the broken down time
|
|
.Fa tm ,
|
|
expressed as local time, into a calendar time value.
|
|
It is equivalent to the C standard function
|
|
.Xr mktime 3 ,
|
|
and is provided for symmetry only.
|
|
.Sh SEE ALSO
|
|
.Xr ctime 3 ,
|
|
.Xr tzset 3
|