NetBSD/lib/libc/time
jtc 43fa6fe319 If port provides __weak_alias(), provide an Standard C and POSIX pure
identifier namespace by renaming non standard functions and variables
such that they have a leading underscore.  The library will use those
names internally.  Weak aliases are used to provide the original names
to the API.

This is only the first part of this change.  It is most of the functions
which are implemented in C for all NetBSD ports.  Subsequent changes are
to add the same support to the remaining C files, to assembly files, and
to the automagically generated assembly source used for system calls.
When all of the above is done, ports with weak alias support should add
a definition for __weak_alias to <sys/cdefs.h>.
1997-07-21 14:06:24 +00:00
..
Makefile.inc Add a strptime(3) manual page. 1997-05-25 19:29:36 +00:00
Music import tzcode1997e 1997-06-18 00:41:05 +00:00
README import tzcode1997e 1997-06-18 00:41:05 +00:00
Theory import tzcode96a 1996-01-08 22:45:14 +00:00
WWW.htm import tzcode1997e 1997-06-18 00:41:05 +00:00
asctime.c Fix RCSID's 1997-07-13 20:25:30 +00:00
checktab.awk import tzcode96l 1996-09-10 21:59:47 +00:00
ctime.3 Add standards conformance statement. 1997-07-14 23:35:02 +00:00
difftime.c Fix RCSID's 1997-07-13 20:25:30 +00:00
ialloc.c Fix RCSID's 1997-07-13 20:25:30 +00:00
localtime.c If port provides __weak_alias(), provide an Standard C and POSIX pure 1997-07-21 14:06:24 +00:00
private.h Fix RCSID's 1997-07-13 20:25:30 +00:00
scheck.c Fix RCSID's 1997-07-13 20:25:30 +00:00
strftime.3 Add a reference to the strptime(3) manual page. 1997-05-25 19:34:44 +00:00
strftime.c If port provides __weak_alias(), provide an Standard C and POSIX pure 1997-07-21 14:06:24 +00:00
strptime.3 Add a strptime(3) manual page. 1997-05-25 19:29:36 +00:00
strptime.c If port provides __weak_alias(), provide an Standard C and POSIX pure 1997-07-21 14:06:24 +00:00
time2posix.3 Sync with tzcode1997e 1997-06-18 01:12:39 +00:00
tzfile.5 Sync with tzcode1997e 1997-06-18 01:12:39 +00:00
tzfile.h Fix RCSID's 1997-07-13 20:25:30 +00:00
tzselect.8 import tzcode96l 1996-09-10 21:59:47 +00:00
tzselect.ksh import tzcode1997e 1997-06-18 00:41:05 +00:00
tzset.3 Sync with tzcode1997e 1997-06-18 01:12:39 +00:00
zdump.8 sync with tzcode96l 1996-09-10 22:04:29 +00:00
zdump.c Fix RCSID's 1997-07-13 20:25:30 +00:00
zic.8 Sync with tzcode1997e 1997-06-18 01:12:39 +00:00
zic.c Fix RCSID's 1997-07-13 20:25:30 +00:00

README

@(#)README	7.9

"What time is it?" -- Richard Deacon as The King
"Any time you want it to be." -- Frank Baxter as The Scientist
					(from the Bell System film on time)

The 1989 update of the time zone package featured

*	POSIXization (including interpretation of POSIX-style TZ environment
	variables, provided by Guy Harris),
*	ANSIfication (including versions of "mktime" and "difftime"),
*	SVIDulation (an "altzone" variable)
*	MACHination (the "gtime" function)
*	corrections to some time zone data (including corrections to the rules
	for Great Britain and New Zealand)
*	reference data from the United States Naval Observatory for folks who
	want to do additional time zones
*	and the 1989 data for Saudi Arabia.

(Since this code will be treated as "part of the implementation" in some places
and as "part of the application" in others, there's no good way to name
functions, such as timegm, that are not part of the proposed ANSI C standard;
such functions have kept their old, underscore-free names in this update.)

And the "dysize" function has disappeared; it was present to allow compilation
of the "date" command on old BSD systems, and a version of "date" is now
provided in the package.  The "date" command is not created when you "make all"
since it may lack options provided by the version distributed with your
operating system, or may not interact with the system in the same way the
native version does.

Since POSIX frowns on correct leap second handling, the default behavior of
the "zic" command (in the absence of a "-L" option) has been changed to omit
leap second information from its output files.

Be sure to read the comments in "Makefile" and make any changes
needed to make things right for your system.

To use the new functions, use a "-ltz" option when compiling or linking.

Historical local time information has been included here not because it
is particularly useful, but rather to:

*	give an idea of the variety of local time rules that have
	existed in the past and thus an idea of the variety that may be
	expected in the future;

*	provide a test of the generality of the local time rule description
	system.

The information in the time zone data files is by no means authoritative;
if you know that the rules are different from those in a file, by all means
feel free to change file (and please send the changed version to
tz@elsie.nci.nih.gov for use in the future).  Europeans take note!

Thanks to these Timezone Caballeros who've made major contributions to the
time conversion package:  Keith Bostic; Bob Devine; Paul Eggert; Robert Elz;
Guy Harris; Mark Horton; John Mackin; and Bradley White.  Thanks also to
Michael Bloom, Art Neilson, Stephen Prince, John Sovereign, and Frank Wales
for testing work, and to Gwillim Law for checking local mean time data.
None of them are responsible for remaining errors.

Look in the ~ftp/pub directory of elsie.nci.nih.gov
for updated versions of these files.

Please send comments or information to tz@elsie.nci.nih.gov.