[Buildroot] [PATCH 1/1] iputils: Add capability for clockdiff, ping, traceroute6
Thomas Petazzoni
thomas.petazzoni at bootlin.com
Mon Jul 29 06:54:49 UTC 2019
Hello Petr,
+Yann in Cc.
On Sun, 28 Jul 2019 21:53:46 +0200
Petr Vorel <petr.vorel at gmail.com> wrote:
> NOTE: not setting for arping as it can be used for ARP Poisoning
>
> NOTE: use cap_net_raw+p (drop +e) as upstream sets that via
> cap_set_flag(), see https://github.com/iputils/iputils/issues/194
>
> Signed-off-by: Petr Vorel <petr.vorel at gmail.com>
> ---
> package/iputils/iputils.mk | 6 ++++++
> 1 file changed, 6 insertions(+)
>
> diff --git a/package/iputils/iputils.mk b/package/iputils/iputils.mk
> index 8e6a3e2fc5..2ffa8da554 100644
> --- a/package/iputils/iputils.mk
> +++ b/package/iputils/iputils.mk
> @@ -73,11 +73,17 @@ IPUTILS_POST_INSTALL_TARGET_HOOKS += IPUTILS_CREATE_PING6_SYMLINK
>
> # handle permissions ourselves
> IPUTILS_CONF_OPTS += -DNO_SETCAP_OR_SUID=true
> +ifeq ($(BR2_ROOTFS_DEVICE_TABLE_SUPPORTS_EXTENDED_ATTRIBUTES),y)
> +IPUTILS_CAPABILITY = |xattr cap_net_raw+p
> +endif
> define IPUTILS_PERMISSIONS
> /usr/sbin/arping f 4755 0 0 - - - - -
> /usr/bin/clockdiff f 4755 0 0 - - - - -
> + $(IPUTILS_CAPABILITY)
It looks a bit annoying to me that we have to add this
BR2_ROOTFS_DEVICE_TABLE_SUPPORTS_EXTENDED_ATTRIBUTES conditional.
Indeed, every single place where a permission/device table will want to
use extended attributes, we will have to add such a conditional.
Shouldn't this logic be moved into the code that parses the
permission/device table, and simply discard the extended attributes if
BR2_ROOTFS_DEVICE_TABLE_SUPPORTS_EXTENDED_ATTRIBUTES is disabled ?
(Possibly with a warning)
Thanks,
Thomas
--
Thomas Petazzoni, CTO, Bootlin
Embedded Linux and Kernel engineering
https://bootlin.com
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