* Copyright (c) 1987 Regents of the University of California.
* %sccs.include.redist.c%
#if defined(LIBC_SCCS) && !defined(lint)
static char sccsid
[] = "@(#)timezone.c 5.9 (Berkeley) %G%";
#endif /* LIBC_SCCS and not lint */
* 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.
static char czone
[TZ_MAX_CHARS
]; /* space for zone name */
char *getenv(), *index(), *strncpy(), *_tztab();
if (beg
= getenv("TZNAME")) { /* set in environment */
if (end
= index(beg
, ',')) { /* "PST,PDT" */
(void)strncpy(czone
,beg
,sizeof(czone
) - 1);
czone
[sizeof(czone
) - 1] = '\0';
return(_tztab(zone
,dst
)); /* default: table or created zone */
-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 */
/* there's no way to distinguish this from WET */
0, "GMT", 0, /* Greenwich */
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 */
* 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
register struct zone
*zp
;
for (zp
= zonetab
; zp
->offset
!= -1;++zp
) /* static tables */
if (zp
->offset
== zone
) {
if (zone
< 0) { /* create one */
(void)sprintf(czone
,"GMT%c%d:%02d",sign
,zone
/ 60,zone
% 60);