Hello,

I have a USB Transcend pendrive capable of storing 128MB size. I have written a script which will be read by the automount program
to mount the pendrive at a location /home/seran/removable/usbthumb.

If the pen drive is plugged in "usbthumb" directory will be created.
If the pen drive is unplugged the "usbthumb" directory will disappear.

After plugging in the pendrive all the files are listed at the location /home/seran/removable/usbthumb.

Now I have to show a window or dialog box which should popup
whenever the pen drive is plugged in. I have written a simple
dialog designed using Qt (modal dialog).

To achieve this I added the following lines in /etc/hotplug/usb.agent script at the end of "add)" section:
But the dialog never appears on screen. I tried using "exec" also, but didn't succeed. The execution of "/home/seran/showdialog" always fails.

I don't understand why this happens?

In short:
A dialog box should appear on screen whenever I plug-in my pendrive.

How do I do this? Any ideas. Please provide some suggestions.

My machine is RedHat 9.0, shell bash.

Thanks
Seran

You could give 'xmessage' a go.
This will ensure the local X display is used, and then display a message box.
Hope that helps.

Thanks for the reply. But this too doesn't work.

If I call a plain shell script (without any X Window related binary) from usb.agent there are no issues.

If I call any X related binaries (like xterm, xcalc, and my Qt UI) it fails.

I suspect "hotplug" doesn't have permissions to enter X's territory.

But I achieved this in other way.

1. I added a service inside /etc/init.d/ called "showusbui"
2. This service will start a shell script in background which will check for the pendrive insertion (infinite loop). If the pendrive is inserted the directory "/home/seran/removable/usbthumb/" will be created. Then it is pop's up the UI.

Here is the shell script which runs in background.
And I believe there are lots to learn about "hotplug".