From mboxrd@z Thu Jan  1 00:00:00 1970
From: Olaf Hering <olh@suse.de>
Date: Mon, 23 Feb 2004 16:39:42 +0000
Subject: Re: Permissions in udev don't work when klibc is used ?
Message-Id: <20040223163942.GA29281@suse.de>
List-Id: <linux-hotplug.vger.kernel.org>
References: <200402231118.26239.remco@d-compu.dyndns.org>
In-Reply-To: <200402231118.26239.remco@d-compu.dyndns.org>
MIME-Version: 1.0
Content-Type: text/plain; charset="windows-1252"
Content-Transfer-Encoding: quoted-printable
To: linux-hotplug@vger.kernel.org

 On Mon, Feb 23, Remco wrote:

> - for user and group names to work a "name conversion system" (user datab=
ase +=20
> api to use it) needs to be in place. (e.g. /etc/passwd, /etc/group, ldap =
and=20
> glibc, nss-api, nss_ldap)=20
> klibc hasn't got such a system / api (or it's not fully functional ?) so =
only=20
> uid-s / gid-s are possible when linking against klibc.
> A name conversion system might (or will ?) not be available when using in=
itrd.=20
> (what about early userspace, or am I touching the TODO area too much now =
?)

You can build your udev.permissions via sed, grep, awk or whatever via
getent passwd and getenv group and convert the names to numbers. No need
to pollute klibc with 'useless' stuff.


# provide numbers because klibc has no getpwnam function
# everything would belong to root
PT=3D"`mktemp -q /tmp/udev.mkinitramfs.passwd.$$.XXXXXX`"
GT=3D"`mktemp -q /tmp/udev.mkinitramfs.group.$$.XXXXXX`"
getent passwd | sed -e 's@^\([^:]\+\):[^:]*:\([^:]*\):.*@\1:\2@' > $PT
getent group | sed -e 's@^\([^:]\+\):[^:]*:\([^:]*\):.*@\1:\2@' > $GT
I=3D$IFS
IFS=3D:
while read a b c d e ; do
case "$a" in
	\#*|"") echo comment ;;
	*)
	dev=3D$a
	owner=3D"`sed -e \"/^$b:/s@^.*:@@p;d\" < $PT`"
	group=3D"`sed -e \"/^$c:/s@^.*:@@p;d\" < $GT`"
	if [ "$owner" =3D "" ] ; then owner=3D0 ; fi
	if [ "$group" =3D "" ] ; then group=3D0 ; fi
	mode=3D$d
	echo "$dev:$owner:$group:$mode" >> "$INITRD$udev_permissions"
	;;
esac
done < "$udev_permissions"
IFS=3D$I
rm -fv $PT $GT

If you find a faster solution, let us know.

--=20
USB is for mice, FireWire is for men!

sUse lINUX ag, n=C3=9CRNBERG


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