[GRASS5] GRASS Monitor

[ja id]

hello ,
i had been download grass5 in linux platform but it can't running completely 
.it wanna location,mapset and database...what would i do..and how i'm going 
to do...


>From: "Eric G. Miller" <egm2 at jps.net>
>Reply-To: grass5 at geog.uni-hannover.de
>To: grass5 at geog.uni-hannover.de
>Subject: Re: [GRASS5] GRASS Monitor
>Date: Tue, 17 Apr 2001 18:27:53 -0700
>
>On Tue, Apr 17, 2001 at 02:43:22PM -0300, Bob Covill wrote:
> > Hello,
> >
> > This is probably a question for Eric.
> >
> > I have a recent version of GRASS on Linux (RedHat 6.1). The system is
> > 300 MHz with 200 MB RAM. Everything works fine on this system.
> >
> > I then moved the GRASS build to a faster machine (PIII with 500 MB RAM)
> > also running RedHat Linux. Again, everything worked fine with the
> > exception of the monitor. The monitor (sockets) would start but complain
> > that the socket was unavailable or in use by another program.
> >
> > I discovered the source of the problem was that d.mon was trying to
> > select the monitor before it had completely started. I was able to work
> > around the problem by executing "d.mon -s start=x0" followed by "d.mon
> > select=x0".
> >
> > Any thoughts on why this might be happening?
>
>Nail on head.  Faster machine, executes more code during time slice,
>oops socket or server is not ready to accept connections.  Anyway, 'bout
>the only thing I can think of is to have d.mon sleep() for a little
>while before trying to connect or after the first attempt failing.  It
>may be a little trial an error to decide how many seconds and/or if the
>iterations of "try" should be increased.  One second after first failure
>might be sufficient.  I only know that the CELL/PNG drivers are much
>slower to start up than the X driver.
>
>If I wanted to get tricky, I would try to find out if the monitor is
>running from the process list and try harder to connect if it is, or
>just quit right away if it isn't.  But I think the sleep() hack should
>be sufficient.
>
>grass/src/display/d.mon/cmd/main.c
>
>..
>128     if (select->answer)
>129     {
>130         oops = run("select", select->answer); /* couldn't select */
>131         if (oops && start->answer && strcmp (start->answer,
>		select->answer) == 0) /* try once more */
>132         {
>133             fprintf (stderr, "Problem selecting %s. Will try
>			once more\n", select->answer);
>+++             sleep(1);
>134             oops = run("select", select->answer); /* couldn't
>                         select */
>135         }
>..
>
>P.S. Sorry, been a bit distracted from GRASS lately...
>
>--
>Eric G. Miller <egm2 at jps.net>
>
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