grass at holstein.age.uiuc.edu
Wed Sep 14 11:55:20 EDT 1994
> From grass-lists-owner at max.cecer.army.mil Tue Aug 30 13:39:47 1994
> From: sue at ced.berkeley.edu (Susan Huse)
> Subject: redirecting stderr
> Sender: grass-lists-owner at max.cecer.army.mil
> Reply-To: grassp-list at max.cecer.army.mil
> To: grassp-list at max.cecer.army.mil
> Date: Tue, 30 Aug 1994 11:47:59 -0700 (PDT)
> X-Mailer: ELM [version 2.4 PL23]
> Content-Type> : > text>
> Content-Length: 900
> I am trying to write a tcltk script that finds the nearest site
> and displays in a tk text widget stored text associated with the
> I want to use d.where as coordinate input to the script, but I'm
> having a difficult time redirecting the stderr. It seems that
have yout tried piping the output through sed?
> stdout is just the coordinate pairs, which I want. The stderr
> includes the mouse button instructions, etc. Tcltk chokes on
> the stderr, thinking that in fact there has been an error.
some of the GRASS commands exit with a non zero status...
TCL picks this up as an error and directs the output into
an error message.
You may have to run this in a shellscript that sets the exit
status to zero when done.
> How do I redirect stderr to /dev/null or somewhere else. It seems
> that d.where (and d.what.rast) don't understand "2>".
> I get a usage error statement telling that 2 is not a valid spheroid
> parameter. I would be willing to use a pipe that directed only
> stderr, but don't know how to do that. I don't want to use "|&"
> because then I either lose my stdout or I get the button commands,
> etc. mingled in with my coordinates.
> Sue Huse
> UC Berkeley
University of Illinois
Dept. Of Ag. Engineering
More information about the grass-dev