El Fri, Sep 19, 2008 at 07:24:40PM +0530 Nalajala Murali ha dit: > I need a solution for the below problem. > > When the USB got detected by the kernel ( Linux ) i am not able to > figure it out to where it is mapped on my dev file system. Please let > me know how will i come to know to where my USB is mapped using the C > routine!!! Is there any provision to call some kernel related > functions so that i cae to know where it mapped? Also how do i know ( > application ) the USB disconnection? > > Also i heard few solutions for the above problem like, "Query HAL over > Dbus" and reading information from "libsysfs" library.Though first one > is pretty good i don't know how to use Dbus in my application ( it bit > confused me ).If any one propose any better solutions that would be > very helpful. maybe instead of figuring out where your device is mapped you could use udev rules to enforce a mapping. udev rules are usually defined in /etc/udev/rules.d/, the format is described in http://www.reactivated.net/writing_udev_rules.html for example i use the following rules to map a usb stick on the first usb controller of an embedded device to /dev/usbhda: KERNEL=="sd?", SUBSYSTEM=="block", KERNELS=="1-1:1.0", SUBSYSTEMS=="usb", SYMLINK="usbhda" KERNEL=="sd*[0-9]", SUBSYSTEM=="block", KERNELS=="1-1:1.0", ACTION=="add", SYMLINK="usbhda%n" the application could use inotify(7) to watch /dev and be informed when the device node is added or removed -- Matthias Kaehlcke Embedded Linux Engineer Barcelona If you don't know where you are going, you will probably end up somewhere else (Laurence J. Peter) .''`. using free software / Debian GNU/Linux | http://debian.org : :' : `. `'` gpg --keyserver pgp.mit.edu --recv-keys 47D8E5D4 `- -- To unsubscribe from this list: send an email with "unsubscribe kernelnewbies" to ecartis@xxxxxxxxxxxx Please read the FAQ at http://kernelnewbies.org/FAQ
