Experimental Physics and
Industrial Control System

"liushu" <[email protected]> · Fri, 25 Feb 2005 15:29:29 +0800

Hi,everyone!
Our epics release is base3.13.8, in July we set environment variables in config/CONFIG_SITE_ENV such as

EPICS_TS_MIN_WEST=-420
EPICS_TS_NTP_INET=***.***.***.***

in order that the IOC's time is the same to the NTP server.

But now, in Feb,when we run the command "date" on the IOC, we find it's late one hour than normal, Because here we have no daylight saving time,so we have to modified the "EPICS_TS_MIN_WEST=-480".

Does that mean we must modify the "EPICS_TS_MIN_WEST" every year? Who know how can cancel the daylight saving time?

I only find some script in the base/src/db/drvTS.c like these:

 /*

    This section sets up the vxWorks clock for use with the ansiLib

    functions.  The TIMEZONE environment variable for vxWorks is only

    overwritten if it has not been set.  It seems as though the day

    light saving time does not work (at least following the directions

    in ansiLib).

    The EPICS environment variable EPICS_TS_MIN_WEST holds the minutes

    west of GMT (UTC) time.  This variable should be preset by the EPICS

    administrator for your site.

    */

if(getenv("TIMEZONE")==(char*)NULL)

    {

        if(envGetConfigParam(&EPICS_TS_MIN_WEST,sizeof(min_west),min_west)==NULL

          || strlen(min_west)==0)

        {

            TSprintf("TS initialization: No Time Zone Information\n");

        }

        else

        {

            sprintf(tz,"TIMEZONE=UTC::%s:040102:100102",min_west);

            if(putenv(tz)==ERROR)

            {

                TSprintf("TS initialization: TIMEZONE putenv failed\n");

            }

        }

    }

    TSdriverInit(); /* Call the user's driver initialization if supplied */

    return 0;

}

　Best regards

 Liushu  
 Control Group, Accelerator Center
 Institute of high energy physics (IHEP)
 P.O.Box 918-10,100039
 Beijing, P.R.China
 Tel: +86-10-88236274-804,   Fax: +86-10-88236190
 e-mail: [email protected]

Experimental Physics and Industrial Control System

Experimental Physics and
Industrial Control System