Date: Mon, 17 Oct 2005 16:33:56 +0200 From: Tom Alsberg <alsbergt@cs.huji.ac.il> To: FreeBSD Hackers List <freebsd-hackers@freebsd.org> Subject: How to determine link of umass/da devices Message-ID: <20051017143356.GA12188@zoopee.org>
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Hi. I need to write some user interface to perform some tasks with USB storage devices. One of the tasks is to show a list of all USB storage connected and all slices/partitions and filesystems in them. With tools like usbdevs and sysctl, I can find out what USB devices are connected, and also what USB drivers handle them (so I can see, for example, that there is a SanDisk Cruzer Micro connected to port 2 in bus 3 and the umass driver under it). I can also find out what da devices there are using camcontrol. However, how can I find out which da device was assigned to which umass/usb device? I see this info in some inconvenient form in dmesg. But I need something easier to handle programmatically to write a program that uses that data. I prefer not to resort to some ugly hack like trying to parse dmesg. Also, I'd be interested if it were possible to have my program informed when devices are connected/disconnected. Can a process ask usbd to send it some signal and somehow provide the details of the event when a device is connected/disconnected? Thanks, -- Tom -- Tom Alsberg - certified insane, complete illiterate. Homepage: http://www.cs.huji.ac.il/~alsbergt/ * An idea is not responsible for the people who believe in it.
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