On Friday 02 January 2009 12:54, Biggy UAC wrote: > in my application i want to detect usb flash drive when pluged/unpluged > and display in a textbox usb drive letter. > how to detect usb drive stick plug/unplug in gambas2 ??
Linux doesn't have drive letters, but you should be able to get the device name (e.g. /dev/sde) in a couple of different ways. The correct way to do it is to set your program up as a hotplug agent for USB drives using udev (probably putting a file in /etc/udev/rules.d). But doing that may screw up your users' normal hotplug functionality (i.e. KDE or GNOME asking the user what they want to do with the drive.) Google for udev hotplug for more information on this, because I've never done it myself. Also, on older systems the devfs system was used rather than udev and you'd need to deal with /etc/hotplug/usb.usermap (I think.) Another way, less intrusive but by no means foolproof, is to have a process running in your Gambas program, "tail -f /var/log/messages" or "tail -f /var/log/syslog". Here is what appeared in /var/log/messages last night on one of my Mandriva boxes when I attached my Archos hard disk jukebox: Jan 1 20:46:59 raindog2 kernel: usb 5-5: new high speed USB device using ehci_hcd and address 7 Jan 1 20:46:59 raindog2 kernel: usb 5-5: configuration #1 chosen from 1 choice Jan 1 20:46:59 raindog2 kernel: scsi7 : SCSI emulation for USB Mass Storage devices Jan 1 20:47:04 raindog2 kernel: Vendor: Archos Model: PC Hard Drive Rev: 0316 Jan 1 20:47:04 raindog2 kernel: Type: Direct-Access ANSI SCSI revision: 02 Jan 1 20:47:04 raindog2 kernel: SCSI device sdh: 312175080 512-byte hdwr sectors (159834 MB) Jan 1 20:47:04 raindog2 kernel: sdh: Write Protect is off Jan 1 20:47:04 raindog2 kernel: sdh: assuming drive cache: write through Jan 1 20:47:04 raindog2 kernel: SCSI device sdh: 312175080 512-byte hdwr sectors (159834 MB) Jan 1 20:47:04 raindog2 kernel: sdh: Write Protect is off Jan 1 20:47:04 raindog2 kernel: sdh: assuming drive cache: write through Jan 1 20:47:04 raindog2 kernel: sdh: sdh1 Jan 1 20:47:04 raindog2 kernel: sd 7:0:0:0: Attached scsi removable disk sdh If you look for the words "Attached scsi removable disk" in the output of that tail -f, the next word in that line should be the device name of the drive. I haven't hooked any USB drives up to my Ubuntu server since I upgraded so I don't know if every distro has logs that look like that, or just Mandriva. Rob ------------------------------------------------------------------------------ _______________________________________________ Gambas-user mailing list Gambas-user@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/gambas-user
