HP C/iX Library Reference Manual (30026-90004)

Chapter 5 377

HP C/iX Library Function Descriptions

tzset

Sets time zone conversion information.

Syntax

#include <time.h> /* proto */

void tzset (void);

Parameters

None.

Return Values

None.

Description

The tzset function uses the value of the user-deﬁned environment variable TZ to set time

conversion information used by localtime(), ctime(), strftime(), and mktime().

The tzset() function sets the external variable tzname:

extern char

*tzname[2]

={"

std

", "

dst

"};

where

std

and

dst

are described in the HP C/iX Library Reference Manual. If no TZ

environment variable exists, Eastern Standard Time (EST) and Eastern Daylight Time

(EDT) for the United States are used (EST5EDT is assumed for TZ).