Hi Ivan,

your problem is not "do {  }" but Exec - it does not wait for the command to
return - look for
 
  PipeRead 'command 1>&2'

in man fvwm, i would put the commandstring in a small script


wget -nv http://www.riotingmanhattan.com/webcam/5thave.jpg -O - |\
  convert -resize 200 - $[HOME]/.fvwm/icons/webcam1.png

for example $HOME/bin/getpic and use 

Do { PipeRead $HOME/bin/getpic 1>&2 }

instead of your first line 

Matthias

umh: i did not test it...


On Tue, 7 Mar 2006 18:05:29 +0600 "Ivan Butorin" <[EMAIL PROTECTED]>
wrote:

> Greetings,
> 
> I've written a little script which is get image from the web, resize
> it and display in widget. Here is the 'Init' part:
> 
> Init
>     Begin
>            Do {Exec wget -nv
> http://www.riotingmanhattan.com/webcam/5thave.jpg -O - | convert
> -resize 200 - $[HOME]/.fvwm/icons/webcam1.png}
>            Do {Exec echo "Downloaded & converted at $(date +%H:%M:%S)"}
>            ChangeIcon 1 webcam1.png
>            Do {Exec echo "Image has been changed at $(date +%H:%M:%S)"}
>     End
> 
> The 'PeriodicTasks' part of the script is the same, except one 'If'
> statement which checks if it is already time to get new image.
> 
> The problem is that commands are ran in wrong order. Here is the
> output taken from .xsession-errors:
> 
> Downloaded & converted at 17:55:00
> Image has been changed at 17:55:00
> 17:55:02 URL:http://www.riotingmanhattan.com/webcam/5thave.jpg
> [29046/29046] -> "-" [1]
> Downloaded & converted at 17:55:20
> Image has been changed at 17:55:20
> 17:55:21 URL:http://www.riotingmanhattan.com/webcam/5thave.jpg
> [28753/28753] -> "-" [1]
> 
> As you can see the script first reports that image has been
> downloaded, then it updates image in the widget, then reports that it
> has changed the image and only after all these stuff it starts to
> download the image.
> 
> Why?
> 
> fvwm 2.5.15 compiled on Jan 19 2006 at 07:41:07
> with support for: ReadLine, Stroke, XPM, PNG, Shape, XShm, SM,
> Xinerama, XRender, XFT, NLS
> 
> Thank you,
> --
> Ivan Butorin <[EMAIL PROTECTED]>
> 
> 

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