Finally deprecate the old timezone() interface in favor of an XSH5

timezone/daytime pair; as proposed by J.T. in September, 1996.
Fixes PR standards/11807 by Nick Hudson.

include/time.h

@@ -1,4 +1,4 @@
-/*	$NetBSD: time.h,v 1.26 2001/03/29 19:06:39 kleink Exp $	*/
+/*	$NetBSD: time.h,v 1.27 2001/03/31 18:29:20 kleink Exp $	*/
 
 /*
  * Copyright (c) 1989, 1993
@@ -113,6 +113,10 @@ void tzset __P((void));
  */
 #if (!defined(_POSIX_C_SOURCE) && !defined(_XOPEN_SOURCE)) || \
     (_XOPEN_SOURCE - 0) >= 4
+extern int daylight;
+#ifndef __LIBC12_SOURCE__
+extern long int timezone __RENAME(__timezone13);
+#endif
 char *strptime __P((const char * __restrict, const char * __restrict,
     struct tm * __restrict));
 #endif
@@ -149,7 +153,9 @@ time_t posix2time __P((time_t));
 time_t timegm __P((struct tm *const));
 time_t timeoff __P((struct tm *const, const long));
 time_t timelocal __P((struct tm *const));
+#ifdef __LIBC12_SOURCE__
 char *timezone __P((int, int));
+#endif
 void tzsetwall __P((void));
 struct tm *offtime __P((const time_t *const, const long));
 #endif /* !_POSIX_C_SOURCE && !_XOPEN_SOURCE */

lib/libc/gen/timezone.3

@@ -1,4 +1,4 @@
-.\"	$NetBSD: timezone.3,v 1.10 1998/08/02 03:20:41 jeremy Exp $
+.\"	$NetBSD: timezone.3,v 1.11 2001/03/31 18:29:21 kleink Exp $
 .\"
 .\" Copyright (c) 1991, 1993
 .\"	The Regents of the University of California.  All rights reserved.
@@ -47,11 +47,15 @@
 .Sh DESCRIPTION
 .Bf -symbolic
 .\" This interface is available from the compatibility library, libcompat;
-This interface is available for compatibility;
+This interface is available for compatibility only and will disappear in a
+future software release;
 it is impossible to reliably map timezone's arguments to a time zone
 abbreviation.
 See
-.Xr ctime 3 .
+.Xr ctime 3 ;
+see
+.Xr tzset 3
+for the new definition of this interface.
 .Ef
 .Pp
 The
@@ -66,7 +70,8 @@ is the number of minutes west of GMT and
 .Ar dst
 is non-zero if daylight savings time is in effect.
 .Sh SEE ALSO
-.Xr ctime 3
+.Xr ctime 3 ,
+.Xr tzset 3
 .Sh HISTORY
 A
 .Fn timezone

lib/libc/gen/timezone.c

@@ -1,4 +1,4 @@
-/*	$NetBSD: timezone.c,v 1.14 2000/01/23 07:37:47 mycroft Exp $	*/
+/*	$NetBSD: timezone.c,v 1.15 2001/03/31 18:29:21 kleink Exp $	*/
 
 /*
  * Copyright (c) 1987, 1993
@@ -38,10 +38,12 @@
 #if 0
 static char sccsid[] = "@(#)timezone.c	8.1 (Berkeley) 6/4/93";
 #else
-__RCSID("$NetBSD: timezone.c,v 1.14 2000/01/23 07:37:47 mycroft Exp $");
+__RCSID("$NetBSD: timezone.c,v 1.15 2001/03/31 18:29:21 kleink Exp $");
 #endif
 #endif /* LIBC_SCCS and not lint */
 
+#define __LIBC12_SOURCE__
+
 #include "namespace.h"
 #include <sys/types.h>
 #include <sys/time.h>
@@ -50,12 +52,6 @@ __RCSID("$NetBSD: timezone.c,v 1.14 2000/01/23 07:37:47 mycroft Exp $");
 #include <string.h>
 #include <tzfile.h>
 
-#if 0
-#ifdef __weak_alias
-__weak_alias(timezone,_timezone)
-#endif
-#endif
-
 /*
  * timezone --
  *	The arguments are the number of minutes of time you are westward

lib/libc/time/Makefile.inc

@@ -1,10 +1,11 @@
-#	$NetBSD: Makefile.inc,v 1.7 1999/05/04 15:34:50 kleink Exp $
+#	$NetBSD: Makefile.inc,v 1.8 2001/03/31 18:29:21 kleink Exp $
 
 .PATH: ${.CURDIR}/time
 
-SRCS+=	asctime.c difftime.c localtime.c strftime.c strptime.c
+SRCS+=	_daylight.c							\
+	asctime.c difftime.c localtime.c strftime.c strptime.c
 MAN+=	ctime.3 time2posix.3 tzfile.5 tzset.3 strftime.3 strptime.3
-CFLAGS+=-DALL_STATE
+CFLAGS+=-DALL_STATE -DUSG_COMPAT
 
 MLINKS+=ctime.3 ctime_r.3	\
 	ctime.3 asctime.3	\

lib/libc/time/_daylight.c

@@ -0,0 +1,13 @@
+/*	$NetBSD: _daylight.c,v 1.1 2001/03/31 18:29:21 kleink Exp $	*/
+
+/*
+ * Written by Klaus Klein, December 27, 2000.
+ * Public domain.
+ */
+
+#include <sys/cdefs.h>
+
+#ifdef __indr_reference
+__indr_reference(_daylight, daylight)
+#endif
+/* LINTED empty translation unit */

lib/libc/time/localtime.c

@@ -1,4 +1,4 @@
-/*	$NetBSD: localtime.c,v 1.24 2000/09/13 22:32:28 msaitoh Exp $	*/
+/*	$NetBSD: localtime.c,v 1.25 2001/03/31 18:29:21 kleink Exp $	*/
 
 /*
 ** This file is in the public domain, so clarified as of
@@ -10,7 +10,7 @@
 #if 0
 static char	elsieid[] = "@(#)localtime.c	7.70";
 #else
-__RCSID("$NetBSD: localtime.c,v 1.24 2000/09/13 22:32:28 msaitoh Exp $");
+__RCSID("$NetBSD: localtime.c,v 1.25 2001/03/31 18:29:21 kleink Exp $");
 #endif
 #endif /* LIBC_SCCS and not lint */
 
@@ -30,6 +30,7 @@ __RCSID("$NetBSD: localtime.c,v 1.24 2000/09/13 22:32:28 msaitoh Exp $");
 
 #ifdef __weak_alias
 __weak_alias(ctime_r,_ctime_r)
+__weak_alias(daylight,_daylight)
 __weak_alias(gmtime_r,_gmtime_r)
 __weak_alias(localtime_r,_localtime_r)
 __weak_alias(offtime,_offtime)

lib/libc/time/tzset.3

@@ -1,4 +1,4 @@
-.\"	$NetBSD: tzset.3,v 1.12 2001/03/29 20:56:30 kleink Exp $
+.\"	$NetBSD: tzset.3,v 1.13 2001/03/31 18:29:21 kleink Exp $
 .TH TZSET 3
 .SH NAME
 tzset \- initialize time conversion information
@@ -8,6 +8,8 @@ Standard C Library (libc, -lc)
 .nf
 .B void tzset(void);
 .PP
+.B extern long int timezone;
+.B extern int daylight;
 .fi
 .SH DESCRIPTION
 .I Tzset
@@ -215,6 +217,16 @@ environment variable does not specify a
 .IR tzfile (5)-format
 and cannot be interpreted as a direct specification,
 UTC is used.
+.PP
+.I Tzset
+sets the external variable
+.I timezone
+to the difference, in seconds, between Coordinated Universal Time (UTC)
+and local standard time.
+The external variable
+.I daylight
+is set to 0 if Daylight Savings Time conversions should never be applied
+for the time zone in use; otherwise non-zero.
 .SH FILES
 .ta \w'/usr/share/zoneinfo/posixrules\0\0'u
 /etc/localtime	local time zone file