[B.A.T.M.A.N.] [PATCH 0/9] batctl: relax root privileges check

[Sven Eckelmann <sven@narfation.org>]

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Hi,

batctl has a "root" user check since the beginning of this tool. It even got a
TODO comment in 58525b8330e9 ("batctl: adjust vis.c coding style"):

    /* TODO: remove this generic check here and move it into the individual functions */

This patchset is now trying to resolve this TODO.

 * batctl: Move root privileges check in separate function
 * batctl: Use geteuid for checks of root privileges
 * batctl: Return type of error on netlink_get_info error
 * batctl: Make root privileges check function specific
 * batctl: Allow to retrieve interface stats as non-root
 * batctl: Allow to read loglevel as normal user
 * batctl: Allow to read gw_mode as normal user
 * batctl: Allow to read sysfs settings as normal user
 * batctl: Allow to read list of interfaces as normal user

"Return type of error on netlink_get_info error" may look a little bit odd in
this list. But it was required in my initial test to avoid that "originators"
and "gwl" try to start a debugfs access when the netlink function should have
returned a "-EPERM" (but did return a -EOPNOTSUPP).

Kind regards,
	Sven

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