From: Olaf Hering <olh@suse.de>
To: linux-hotplug@vger.kernel.org
Subject: Re: Permissions in udev don't work when klibc is used ?
Date: Mon, 23 Feb 2004 16:39:42 +0000 [thread overview]
Message-ID: <20040223163942.GA29281@suse.de> (raw)
In-Reply-To: <200402231118.26239.remco@d-compu.dyndns.org>
On Mon, Feb 23, Remco wrote:
> - for user and group names to work a "name conversion system" (user database +
> api to use it) needs to be in place. (e.g. /etc/passwd, /etc/group, ldap and
> glibc, nss-api, nss_ldap)
> klibc hasn't got such a system / api (or it's not fully functional ?) so only
> uid-s / gid-s are possible when linking against klibc.
> A name conversion system might (or will ?) not be available when using initrd.
> (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="`mktemp -q /tmp/udev.mkinitramfs.passwd.$$.XXXXXX`"
GT="`mktemp -q /tmp/udev.mkinitramfs.group.$$.XXXXXX`"
getent passwd | sed -e 's@^\([^:]\+\):[^:]*:\([^:]*\):.*@\1:\2@' > $PT
getent group | sed -e 's@^\([^:]\+\):[^:]*:\([^:]*\):.*@\1:\2@' > $GT
I=$IFS
IFS=:
while read a b c d e ; do
case "$a" in
\#*|"") echo comment ;;
*)
dev=$a
owner="`sed -e \"/^$b:/s@^.*:@@p;d\" < $PT`"
group="`sed -e \"/^$c:/s@^.*:@@p;d\" < $GT`"
if [ "$owner" = "" ] ; then owner=0 ; fi
if [ "$group" = "" ] ; then group=0 ; fi
mode=$d
echo "$dev:$owner:$group:$mode" >> "$INITRD$udev_permissions"
;;
esac
done < "$udev_permissions"
IFS=$I
rm -fv $PT $GT
If you find a faster solution, let us know.
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next prev parent reply other threads:[~2004-02-23 16:39 UTC|newest]
Thread overview: 10+ messages / expand[flat|nested] mbox.gz Atom feed top
2004-02-23 10:18 Permissions in udev don't work when klibc is used ? Remco
2004-02-23 10:47 ` Kay Sievers
2004-02-23 14:01 ` Remco
2004-02-23 14:30 ` Kay Sievers
2004-02-23 15:18 ` Remco
2004-02-23 16:39 ` Olaf Hering [this message]
2004-02-23 18:31 ` Kay Sievers
2004-02-23 18:55 ` Olaf Hering
2004-02-23 19:01 ` Darren Salt
2004-02-23 19:10 ` Kay Sievers
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