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Bring timezone back to libc.

This commit is contained in:
christos 1997-10-20 15:50:22 +00:00
parent 3ecdd3624c
commit 121197f0ea
3 changed files with 222 additions and 3 deletions
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6
lib/libc/gen/Makefile.inc
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@ -1,4 +1,4 @@
# $NetBSD: Makefile.inc,v 1.79 1997/10/16 23:04:38 christos Exp $ # $NetBSD: Makefile.inc,v 1.80 1997/10/20 15:50:22 christos Exp $
# @(#)Makefile.inc 8.3 (Berkeley) 4/16/94 # @(#)Makefile.inc 8.3 (Berkeley) 4/16/94
# gen sources # gen sources
@ -17,7 +17,7 @@ SRCS+= _errno.c alarm.c assert.c clock.c closedir.c confstr.c ctermid.c \
seekdir.c setdomainname.c sethostname.c setjmperr.c setmode.c \ seekdir.c setdomainname.c sethostname.c setjmperr.c setmode.c \
setproctitle.c siginterrupt.c siglist.c signal.c signame.c \ setproctitle.c siginterrupt.c siglist.c signal.c signame.c \
sigsetops.c sleep.c stringlist.c sysconf.c sysctl.c syslog.c telldir.c \ sigsetops.c sleep.c stringlist.c sysconf.c sysctl.c syslog.c telldir.c \
time.c times.c tolower_.c ttyname.c ttyslot.c toupper_.c \ time.c times.c timezone.c tolower_.c ttyname.c ttyslot.c toupper_.c \
ualarm.c uname.c unvis.c usleep.c utime.c valloc.c vis.c wait.c \ ualarm.c uname.c unvis.c usleep.c utime.c valloc.c vis.c wait.c \
wait3.c waitpid.c warn.c warnx.c vwarn.c vwarnx.c verr.c verrx.c wait3.c waitpid.c warn.c warnx.c vwarn.c vwarnx.c verr.c verrx.c
@ -43,7 +43,7 @@ MAN+= alarm.3 clock.3 confstr.3 ctermid.3 ctype.3 daemon.3 \
ldexp.3 modf.3 nice.3 nlist.3 pause.3 popen.3 psignal.3 pwcache.3 \ ldexp.3 modf.3 nice.3 nlist.3 pause.3 popen.3 psignal.3 pwcache.3 \
raise.3 scandir.3 setjmp.3 setmode.3 setproctitle.3 siginterrupt.3 \ raise.3 scandir.3 setjmp.3 setmode.3 setproctitle.3 siginterrupt.3 \
signal.3 sigsetops.3 sleep.3 stringlist.3 sysconf.3 sysctl.3 syslog.3 \ signal.3 sigsetops.3 sleep.3 stringlist.3 sysconf.3 sysctl.3 syslog.3 \
time.3 times.3 toascii.3 \ time.3 times.3 timezone.3 toascii.3 \
tolower.3 toupper.3 ttyname.3 ualarm.3 uname.3 unvis.3 \ tolower.3 toupper.3 ttyname.3 ualarm.3 uname.3 unvis.3 \
usleep.3 utime.3 valloc.3 vis.3 usleep.3 utime.3 valloc.3 vis.3

72
lib/libc/gen/timezone.3 Normal file
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@ -0,0 +1,72 @@
.\" $NetBSD: timezone.3,v 1.7 1997/10/20 15:50:26 christos Exp $
.\"
.\" Copyright (c) 1991, 1993
.\" The Regents of the University of California. All rights reserved.
.\"
.\" Redistribution and use in source and binary forms, with or without
.\" modification, are permitted provided that the following conditions
.\" are met:
.\" 1. Redistributions of source code must retain the above copyright
.\" notice, this list of conditions and the following disclaimer.
.\" 2. Redistributions in binary form must reproduce the above copyright
.\" notice, this list of conditions and the following disclaimer in the
.\" documentation and/or other materials provided with the distribution.
.\" 3. All advertising materials mentioning features or use of this software
.\" must display the following acknowledgement:
.\" This product includes software developed by the University of
.\" California, Berkeley and its contributors.
.\" 4. Neither the name of the University nor the names of its contributors
.\" may be used to endorse or promote products derived from this software
.\" without specific prior written permission.
.\"
.\" THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
.\" ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
.\" SUCH DAMAGE.
.\"
.\" @(#)timezone.3 8.2 (Berkeley) 4/19/94
.\"
.Dd April 19, 1994
.Dt TIMEZONE 3
.Os
.Sh NAME
.Nm timezone
.Nd return the timezone abbreviation
.Sh SYNOPSIS
.Ft char *
.Fn timezone "int zone" "int dst"
.Sh DESCRIPTION
.Sh DESCRIPTION
.Bf -symbolic
.\" This interface is available from the compatibility library, libcompat;
This interface is available for compatibility;
it is impossible to reliably map timezone's arguments to a time zone
abbreviation.
See ctime(3).
.Ef
.Pp
The
.Fn timezone
function returns a pointer to a time zone abbreviation for the specified
.Ar zone
and
.Ar dst
values.
.Ar Zone
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
.Sh HISTORY
A
.Fn timezone
function appeared in
.At v7 .

147
lib/libc/gen/timezone.c Normal file
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@ -0,0 +1,147 @@
/* $NetBSD: timezone.c,v 1.10 1997/10/20 15:50:29 christos Exp $ */
/*
* Copyright (c) 1987, 1993
* The Regents of the University of California. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by the University of
* California, Berkeley and its contributors.
* 4. Neither the name of the University nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
#include <sys/cdefs.h>
#if defined(LIBC_SCCS) && !defined(lint)
#if 0
static char sccsid[] = "@(#)timezone.c 8.1 (Berkeley) 6/4/93";
#else
__RCSID("$NetBSD: timezone.c,v 1.10 1997/10/20 15:50:29 christos Exp $");
#endif
#endif /* LIBC_SCCS and not lint */
#include "namespace.h"
#include <sys/types.h>
#include <sys/time.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <tzfile.h>
#ifdef __weak_alias
__weak_alias(timezone,_timezone);
#endif
/*
* timezone --
* The arguments are the number of minutes of time you are westward
* from Greenwich and whether DST is in effect. It returns a string
* giving the name of the local timezone. Should be replaced, in the
* application code, by a call to localtime.
*/
char *_tztab __P((int, int));
static char czone[TZ_MAX_CHARS]; /* space for zone name */
char *
timezone(zone, dst)
int zone,
dst;
{
register char *beg,
*end;
if ((beg = getenv("TZNAME")) != NULL) { /* set in environment */
if ((end = strchr(beg, ',')) != NULL) { /* "PST,PDT" */
if (dst)
return(++end);
*end = '\0';
(void)strncpy(czone,beg,sizeof(czone) - 1);
czone[sizeof(czone) - 1] = '\0';
*end = ',';
return(czone);
}
return(beg);
}
return(_tztab(zone,dst)); /* default: table or created zone */
}
static struct zone {
int offset;
char *stdzone;
char *dlzone;
} zonetab[] = {
{ -1*60, "MET", "MET DST" }, /* Middle European */
{ -2*60, "EET", "EET DST" }, /* Eastern European */
{ 4*60, "AST", "ADT" }, /* Atlantic */
{ 5*60, "EST", "EDT" }, /* Eastern */
{ 6*60, "CST", "CDT" }, /* Central */
{ 7*60, "MST", "MDT" }, /* Mountain */
{ 8*60, "PST", "PDT" }, /* Pacific */
#ifdef notdef
/* there's no way to distinguish this from WET */
{ 0, "GMT", 0 }, /* Greenwich */
#endif
{ 0*60, "WET", "WET DST" }, /* Western European */
{ -10*60, "EST", "EST" }, /* Aust: Eastern */
{ -10*60+30, "CST", "CST" }, /* Aust: Central */
{ -8*60, "WST", 0 }, /* Aust: Western */
{ -1, NULL, NULL }
};
/*
* _tztab --
* check static tables or create a new zone name; broken out so that
* we can make a guess as to what the zone is if the standard tables
* aren't in place in /etc. DO NOT USE THIS ROUTINE OUTSIDE OF THE
* STANDARD LIBRARY.
*/
char *
_tztab(zone,dst)
register int zone;
int dst;
{
register struct zone *zp;
register char sign;
for (zp = zonetab; zp->offset != -1;++zp) /* static tables */
if (zp->offset == zone) {
if (dst && zp->dlzone)
return(zp->dlzone);
if (!dst && zp->stdzone)
return(zp->stdzone);
}
if (zone < 0) { /* create one */
zone = -zone;
sign = '+';
}
else
sign = '-';
(void)snprintf(czone, TZ_MAX_CHARS, "GMT%c%d:%02d", sign, zone / 60,
zone % 60);
return(czone);
}