[Buildroot] [PATCH 1/1] package/quagga: Fix directories and permissions

[Thomas Petazzoni <thomas.petazzoni@free-electrons.com>]

Hello,

On Thu, 12 May 2016 10:20:40 +0800, Nathaniel Roach wrote:

> If you're using vtysh to configure Quagga, yes, it absolutely needs 
> write permissions to the config folder, as it's more than likely you'd 
> want to save your config. (Running commands in vtysh is very similar to 
> Cisco routers, there's a "running-config" and a "startup-config" - 
> commands are saved into running, but are not copied into startup by default)
> 
> The daemons themselves don't write to /etc unless you tell it to:
> 
> $sudo vtysh
> ...
> charon# copy run start
> Building Configuration...
> Configuration saved to /etc/quagga/zebra.conf
> Configuration saved to /etc/quagga/ospfd.conf
> [OK]
> 
> It needs write permissions to the folder as it moves the old config and 
> writes a new one, rather than just overwriting.
> 
> In the instance that /etc/ is RO, the user simply won't be able to save 
> an updated configuration.

Right, makes sense. Then, perhaps you want to add a comment on top of
QUAGGA_CONF_OPTS to indicate why we override localstatedir and
sysconfdir. Just something like:

# Override localstatedir and sysconfdir so that quagga has its own
# directories, which is will access with its own user.

or something along those lines (I'm sure a better wording is possible).

> >> +define QUAGGA_PERMISSIONS
> >> +	/etc/quagga r 600 quagga quagga - - - - -
> >> +	/etc/quagga d 755 quagga quagga - - - - -  
> > Hum, does this actually work?  
> Yup, unfortunately wildcards don't, and I didn't feel that adding a line 
> for each daemon was appropriate. (There's one for each daemon, and it's 
> only installed if that daemon is selected, hence why I need to 
> effectively do a wildcard chmod here)

So you need the first line to make every file in /etc/quagga owned by
quagga, 600, and then the second line to make the /etc/quagga directory
owned by the quagga user and 755, so that quagga can create more files
in this directory, right?

> >> +define QUAGGA_INSTALL_INIT_SYSTEMD
> >> +	mkdir -p $(TARGET_DIR)/usr/lib/tmpfiles.d  
> > This mkdir -p is useless, as $(INSTALL) -D creates all sub-directories
> > needed to be able to copy to the destination path.  
> Huh, thanks! I believe I copied this from somewhere else, but I'll take 
> it out in the next revision.

If you've seen it somewhere, try to remember where so that we can fix
this place as well :-)

So overall, looks good. Just fix the very minor nits that I mentioned,
and it's good to go.

Thanks!

Thomas
-- 
Thomas Petazzoni, CTO, Free Electrons
Embedded Linux, Kernel and Android engineering
http://free-electrons.com