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diff --git a/man3p/tzset.3p b/man3p/tzset.3p new file mode 100644 index 000000000..7dab87928 --- /dev/null +++ b/man3p/tzset.3p @@ -0,0 +1,100 @@ +.\" Copyright (c) 2001-2003 The Open Group, All Rights Reserved +.TH "TZSET" P 2003 "IEEE/The Open Group" "POSIX Programmer's Manual" +.\" tzset +.SH NAME +daylight, timezone, tzname, tzset \- set timezone conversion information +.SH SYNOPSIS +.LP +\fB#include <time.h> +.br +.sp +\fP +.LP +\fBextern int daylight; +.br +extern long timezone; +.br +\fP +.LP +\fBextern char *tzname[2]; +.br +void tzset(void); \fP +\fB +.br +\fP +.SH DESCRIPTION +.LP +The \fItzset\fP() function shall use the value of the environment +variable \fITZ\fP to set time conversion information used by +\fIctime\fP() , \fIlocaltime\fP() , \fImktime\fP() , and \fIstrftime\fP() +\&. If \fITZ\fP is absent from the +environment, implementation-defined default timezone information shall +be used. +.LP +The \fItzset\fP() function shall set the external variable \fItzname\fP +as follows: +.sp +.RS +.nf + +\fBtzname[0] = "\fP\fIstd\fP\fB"; +tzname[1] = "\fP\fIdst\fP\fB"; +\fP +.fi +.RE +.LP +where \fIstd\fP and \fIdst\fP are as described in the Base Definitions +volume of IEEE\ Std\ 1003.1-2001, Chapter 8, Environment Variables. +.LP +The \fItzset\fP() function also shall set the external variable \fIdaylight\fP +to 0 if Daylight Savings Time conversions should +never be applied for the timezone in use; otherwise, non-zero. The +external variable \fItimezone\fP shall be set to the +difference, in seconds, between Coordinated Universal Time (UTC) and +local standard time. +.SH RETURN VALUE +.LP +The \fItzset\fP() function shall not return a value. +.SH ERRORS +.LP +No errors are defined. +.LP +\fIThe following sections are informative.\fP +.SH EXAMPLES +.LP +Example \fITZ\fP variables and their timezone differences are given +in the table below: +.TS C +center; l l. +TZ timezone +EST5EDT 5*60*60 +GMT0 0*60*60 +JST-9 -9*60*60 +MET-1MEST -1*60*60 +MST7MDT 7*60*60 +PST8PDT 8*60*60 +.TE +.SH APPLICATION USAGE +.LP +None. +.SH RATIONALE +.LP +None. +.SH FUTURE DIRECTIONS +.LP +None. +.SH SEE ALSO +.LP +\fIctime\fP() , \fIlocaltime\fP() , \fImktime\fP() , \fIstrftime\fP() +, the Base Definitions volume of +IEEE\ Std\ 1003.1-2001, Chapter 8, Environment Variables, \fI<time.h>\fP +.SH COPYRIGHT +Portions of this text are reprinted and reproduced in electronic form +from IEEE Std 1003.1, 2003 Edition, Standard for Information Technology +-- Portable Operating System Interface (POSIX), The Open Group Base +Specifications Issue 6, Copyright (C) 2001-2003 by the Institute of +Electrical and Electronics Engineers, Inc and The Open Group. In the +event of any discrepancy between this version and the original IEEE and +The Open Group Standard, the original IEEE and The Open Group Standard +is the referee document. The original Standard can be obtained online at +http://www.opengroup.org/unix/online.html . |