linux-kernel - Re: usbutils 0.81 release

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Message-ID:  <871vrar6u2.fsf@nemi.mork.no>
Date:	Thu, 30 Apr 2009 08:31:01 +0200
From:	Bjørn Mork <bjorn@...k.no>
To:	linux-kernel@...r.kernel.org
Cc:	linux-usb@...r.kernel.org
Subject:  Re: usbutils 0.81 release

Henrique de Moraes Holschuh
<hmh@....eng.br> writes:

> Debian places it in /var/lib/usbids/ for a good reason.  So does Ubuntu.
> Both have working "update-usbids" scripts (might be the one from upstream,
> or something different).  They also have the original file in /usr/share, I
> don't know if usbutils was changed to check /var first then /usr, or what.

No.  They place a symlink from /usr/share to /var/lib:

bjorn@...i:~$ ls -l /usr/share/misc/usb.ids 
lrwxrwxrwx 1 root root 25 2009-01-24 01:36 /usr/share/misc/usb.ids -> /var/lib/usbutils/usb.ids
bjorn@...i:~$ dpkg -S /usr/share/misc/usb.ids
usbutils: /usr/share/misc/usb.ids

The symlink is probably there for compatibility with other (possibly
non-Debian) utilities.  Debian usbutils does not use the /usr/share path
itself:

bjorn@...i:~$ strings /usr/sbin/lsusb |grep usb.ids
./usb.ids
./usb.ids.gz
/var/lib/usbutils/usb.ids
/var/lib/usbutils/usb.ids.gz

However, looks like the Debian hal uses it.  That's probably the main
reason for the symlink:

bjorn@...i:~$ strings /usr/sbin/hald |grep usb.ids
/usr/share/misc/usb.ids
Couldn't stat usb.ids file '%s', errno=%d: %s
Couldn't open usb.ids file '%s', errno=%d: %s
Couldn't mmap usb.ids file '%s', errno=%d: %s
usb_ids_load


Bjørn

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