Date: Sun, 23 Nov 2003 20:50:45 -0500 From: "Michael E. Mercer" <mmercer@nc.rr.com> To: freebsd-hackers@freebsd.org Subject: USB Question: unable to open /dev/ugen0 more than once Message-ID: <1069638644.355.9.camel@dual.mmercer.com>
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Hello peoples, I posted this to questions with no reply, I was hoping someone here may be able to give some insight. Question: Should I be able to open /dev/ugen0 more than once? I am using FreeBSD 4.9-Stable, libusb-0.1.7. >From reading the libusb docs, you must open the device for each interface you want to acquire. However, once it is opened once, it can't be opened again. Furthermore, calls to usb_find_devices() shows that /dev/ugen0 has disappeared. Investigation on how they(libusb) finds devices, shows they are trying to open the device read only... this is where it tries to open it the second time. This second try fails and therefore libusb thinks the device was removed. Question: Is this the correct behavior? Any help/insight would be greatly appreciated. Michael E Mercer
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