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Path: utzoo!utgpu!water!watnot!watmath!clyde!rutgers!mit-eddie!genrad!decvax!decwrl!labrea!navajo!ali
From: ali@navajo.UUCP
Newsgroups: comp.sys.amiga
Subject: Re: Setting system date
Message-ID: <1387@navajo.STANFORD.EDU>
Date: Tue, 17-Feb-87 02:01:51 EST
Article-I.D.: navajo.1387
Posted: Tue Feb 17 02:01:51 1987
Date-Received: Tue, 17-Feb-87 22:38:56 EST
References: <628@unccvax.UUCP>
Reply-To: ali@navajo.UUCP (Ali Ozer)
Distribution: world
Organization: Stanford University
Lines: 73
Keywords: DateStamp

In article <628@unccvax.UUCP> fwp@unccvax.UUCP (Rick Pasotto) writes:
>How do I set the system date/time in a c program?  DateStamp() only 
>returns the current date/time as do the manx time(c) functions. 

Here's a piece of code that will get/set the time using the IO device.
It's mostly from the RKM, but the code in the version of the RKM I have 
was pretty buggy... The below works with Manx 3.20.

#include "exec/types.h"
#include "exec/nodes.h"
#include "exec/lists.h"
#include "exec/memory.h"
#include "exec/interrupts.h"
#include "exec/ports.h"
#include "exec/libraries.h"
#include "exec/tasks.h"
#include "exec/io.h"
#include "exec/devices.h"
#include "devices/timer.h"
#include "ctype.h"

/* I'm not sure if you have to include all of the above, but, better
   safe than sorry... */

long OpenDevice (), DoIO (), CloseDevice ();
struct timerequest tr;

void TimerErr (closetimer)
int closetimer;
{
  if (closetimer != 0) CloseDevice (&tr);
  printf ("Timer Device Error.\n");
  exit (1);
}

/* Returns the number of seconds since midnite Jan 1, 1978. */

long GetSysSeconds ()
{

  if (OpenDevice (TIMERNAME, UNIT_VBLANK, &tr, 0L) != 0L) TimerErr (0);

  tr.tr_node.io_Message.mn_Node.ln_Type = NT_MESSAGE;
  tr.tr_node.io_Message.mn_Node.ln_Pri = 0L;
  tr.tr_node.io_Message.mn_Node.ln_Name = NULL;
  tr.tr_node.io_Message.mn_ReplyPort = NULL;
  tr.tr_node.io_Command = TR_GETSYSTIME;

  if (DoIO (&tr) != 0L) TimerErr (1);

  CloseDevice (&tr); /* Do we care if this dies? Hmmm. No. */

  return (tr.tr_time.tv_secs);
}

void SetSysSeconds (secs)
long secs;
{

  if (OpenDevice (TIMERNAME, UNIT_VBLANK, &tr, 0L) != 0L) TimerErr (0);

  tr.tr_node.io_Message.mn_Node.ln_Type = NT_MESSAGE;
  tr.tr_node.io_Message.mn_Node.ln_Pri = 0L;
  tr.tr_node.io_Message.mn_Node.ln_Name = NULL;
  tr.tr_node.io_Message.mn_ReplyPort = NULL;
  tr.tr_node.io_Command = TR_SETSYSTIME;
  tr.tr_time.tv_secs = secs;
  tr.tr_time.tv_micro = 0L;

  if (DoIO (&tr) != 0) TimerErr (1);

  CloseDevice (&tr);
}