[libhid-discuss] Need API for identifying the port no to which the usb device is connected

[shivaprasad javali]

So the only way for me to get the port no the USB is attached to is to parse
the /proc/bus/usb/devices file(If it exists)??

And if that file is not present on a system what other options do I have?Are
there any helpful API's in libusb possibly?

Thanks
Shivaprasad

On Tue, Jun 24, 2008 at 5:10 PM, Charles Lepple <clepple at ghz.cc> wrote:

> On Jun 24, 2008, at 12:52 AM, shivaprasad javali wrote:
>
> > Hi,
> >
> >      The location being printed there is the busnumber/
> > devicefilename. While this might be useful for me I am looking for
> > a way for me to get the port no of the usb device. When I look at
> > the file /proc/bus/usb/devices I get a port no field for each usb
> > device there . Thats the port no I want to know about my USB
> > device. Is ther any way to get that port no.
>
> /proc/bus/usb/devices is not available on all systems (especially
> systems where the usbdevfs is mounted at /dev/bus/usb instead).
>
> Since there is no libusb API for this, I don't plan on adding one to
> libhid.
>
> > On Mon, Jun 23, 2008 at 5:43 PM, Charles Lepple <clepple at ghz.cc>
> > wrote:
> > On Jun 23, 2008, at 6:49 AM, shivaprasad javali wrote:
> >
> > >      The usb device that I am working with doesnot have a unique
> > > serial no
> > > for each usb device. So I have to use the port no of the port it is
> > > connected to identify the device uniquely. Is there an API in
> > > libhid that I
> > > can use to get port no?
> >
> >
> > Look in src/hid_presentation.c for hid_write_identification() - it
> > prints a "location" which should probably work for your needs.
> >
> > --
> > Charles Lepple
> >
> >
> >
> >
> > _______________________________________________
> > libhid-discuss mailing list
> > libhid-discuss at lists.alioth.debian.org
> > http://lists.alioth.debian.org/mailman/listinfo/libhid-discuss
> >
>
>
> --
> Charles Lepple
> clepple at ghz.cc
>
>
> _______________________________________________
> libhid-discuss mailing list
> libhid-discuss at lists.alioth.debian.org
> http://lists.alioth.debian.org/mailman/listinfo/libhid-discuss
>