-.\" $OpenBSD: ctime.3,v 1.16 1999/11/15 07:45:57 deraadt Exp $
+.\" $OpenBSD: ctime.3,v 1.17 2000/03/06 21:47:27 aaron Exp $
.\"
.\"
.Dd February 16, 1999
.Sh NAME
.Nm asctime ,
.Nm ctime ,
-.N difftime ,
+.Nm difftime ,
.Nm gmtime ,
.Nm localtime ,
.Nm mktime
.Ft time_t
.Fn mktime "struct tm *tm"
.Sh DESCRIPTION
+The
.Fn ctime
-converts a
-.Ft time_t ,
+function converts a
+.Li time_t ,
pointed to by
-.Ft clock ,
+.Fa clock ,
representing the time in seconds since
00:00:00 UTC, 1970-01-01,
and returns a pointer to a
.Pp
All the fields have constant width.
.Pp
+The
.Fn localtime
and
.Fn gmtime
-return pointers to
-.Ft tm
+functions return pointers to
+.Li tm
structures, described below.
.Fn localtime
corrects for the time zone and any time zone adjustments
(such as Daylight Saving Time in the U.S.A.).
After filling in the
-.Ft tm
+.Li tm
structure,
.Fn localtime
sets the
-.Ft tm_isdst
+.Fa tm_isdst
'th
element of
-.Ft tzname
+.Fa tzname
to a pointer to an
ASCII string that's the time zone abbreviation to be used with
the return value of
.Pp
.Fn asctime
converts a time value contained in a
-.Ft tm
+.Li tm
structure to a 26-character string,
as shown in the above example,
and returns a pointer
converts the broken-down time,
expressed as local time,
in the structure pointed to by
-.Ft tm
+.Li tm
into a calendar time value with the same encoding as that of the values
returned by the
.Fn time
function.
The original values of the
-.Ft tm_wday
+.Fa tm_wday
and
-.Ft tm_yday
+.Fa tm_yday
components of the structure are ignored,
and the original values of the other components are not restricted
to their normal ranges.
(A positive or zero value for
-.Ft tm_isdst
+.Fa tm_isdst
causes
.Fn mktime
to presume initially that summer time (for example, Daylight Saving Time
respectively,
is or is not in effect for the specified time.
A negative value for
-.Ft tm_isdst
+.Fa tm_isdst
causes the
.Fn mktime
function to attempt to divine whether summer time is in effect
for the specified time.)
On successful completion, the values of the
-.Ft tm_wday
+.Fa tm_wday
and
-.Ft tm_yday
+.Fa tm_yday
components of the structure are set appropriately,
and the other components are set to represent the specified calendar time,
but with their values forced to their normal ranges; the final value of
-.Ft tm_mday
+.Fa tm_mday
is not set until
-.Ft tm_mon
+.Fa tm_mon
and
-.Ft tm_year
+.Fa tm_year
are determined.
.Fn mktime
returns the specified calendar time;
.Pp
.Fn difftime
returns the difference between two calendar times,
-(
-.Ft time1
+.Pf ( Fa time1
-
-.Ft time0
-), expressed in seconds.
+.Fa time0 ) ,
+expressed in seconds.
.Pp
Declarations of all the functions and externals, and the
-.Ft tm
+.Li tm
structure, are in the
-.Ft <time.h>
+.Aq Pa time.h
header file.
The structure (of type)
-.Ft struct tm
+.Li struct tm
includes the following fields:
.Bd -literal -offset indent
int tm_sec; /\(** seconds (0 - 60) \(**/
.Ed
.Pp
The
-.Ft tm_zone
+.Fa tm_zone
and
-.Ft tm_gmtoff
+.Fa tm_gmtoff
fields exist, and are filled in, only if arrangements to do
so were made when the library containing these functions was
created.
There is no guarantee that these fields will continue to exist
in this form in future releases of this code.
.Pp
-.Ft tm_isdst
+.Fa tm_isdst
is non-zero if summer time is in effect.
.Pp
-.Ft tm_gmtoff
+.Fa tm_gmtoff
is the offset (in seconds) of the time represented
from UTC, with positive values indicating east
of the Prime Meridian.
.Sh FILES
-.Bl -tag -width "/usr/share/zoneinfo/posixrules"
+.Bl -tag -width "/usr/share/zoneinfo/posixrules" -compact
.It Pa /usr/share/zoneinfo
time zone information directory
.It Pa /etc/localtime
The return values point to static data;
the data is overwritten by each call.
The
-.Ft tm_zone
+.Fa tm_zone
field of a returned
-.Ft "struct tm"
+.Li struct tm
points to a static array of characters, which
will also be overwritten at the next call
(and by calls to
-.\" $OpenBSD: keynote.3,v 1.19 1999/12/02 01:27:16 aaron Exp $
+.\" $OpenBSD: keynote.3,v 1.20 2000/03/06 21:47:27 aaron Exp $
.\"
.\" The author of this code is Angelos D. Keromytis (angelos@dsl.cis.upenn.edu)
.\"
a list of return values in
.Fa returnvalues
(the number of returnvalues in indicated by
-.Fa numvalues ),
-a number (
-.Fa numtrusted )
+.Fa numvalues ) ,
+a number
+.Pf ( Fa numtrusted )
of locally-trusted assertions in
.Fa trusted
(the length of each assertion is given by the respective element of
-.Fa trustedlen ),
-a number (
-.Fa numuntrusted )
+.Fa trustedlen ) ,
+a number
+.Pf ( Fa numuntrusted )
of assertions that need to be cryptographically verified in
.Fa untrusted
(the length of each assertion is given by the respective element of
-.Fa untrustedlen ),
-and a number (
-.Fa numauthorizers )
+.Fa untrustedlen ) ,
+and a number
+.Pf ( Fa numauthorizers )
of action authorizers in
.Fa authorizers .
.Fa env
with
.Fa dec_algorithm
describing the algorithm (see
-.Xr kn_encode_key 3 ),
+.Xr kn_encode_key 3 ) ,
and
.Fa dec_key
pointing to an algorithm-dependent structure. In this implementation,
algorithm was not supported.
.Pp
.Sh FILES
-.Fd keynote.h
-.Fd libkeynote.a
+.Bl -tag -width libkeynote.a -compact
+.It Pa keynote.h
+.It Pa libkeynote.a
+.El
.Sh SEE ALSO
.Xr keynote 1 ,
.Xr keynote 4 ,
.It ``Compliance-Checking in the PolicyMaker Trust Management System''
M. Blaze, J. Feigenbaum, M. Strauss,
1998 Financial Crypto Conference
+.It Web Page
+http://www.cis.upenn.edu/~keynote
.El
.Sh AUTHOR
Angelos D. Keromytis (angelos@dsl.cis.upenn.edu)
-.Sh WEB PAGE
-http://www.cis.upenn.edu/~keynote
.Sh DIAGNOSTICS
The return values of all the functions have been given along with the
function description above.
.Sh BUGS
None that we know of.
-If you find any, please report them at
+If you find any, please report them to
.Bd -literal -offset indent -compact
keynote@research.att.com
.Ed
projects / openbsd / commitdiff