On Mon, Jan 26, 2015 at 05:24:55PM +0100, Guillermo Rodriguez Garcia wrote:
> Hello all,
>
> I am using the ntpd applet in busybox but also wanted to enable the ntpdate
> program (yes I know use of ntpdate is not recommended in general but this
> is for a very specific use case). However I see that ntpdate is part of the
> "ntp" package and that the ntp package is blocked by BUSYBOX_NTPD. From
> rules/ntp.in:
>
> menuconfig NTP
>         tristate
>         prompt "ntp                           "
>         select OPENSSL          if NTP_CRYPTO
>         select ROOTFS_VAR_CACHE if NTP_NTPD
>         select LIBC_M
>         select LIBC_RT
>         select GCCLIBS_GCC_S
>         select LIBMD
>         depends on !BUSYBOX_NTPD || ALLYES
>
> [...]
> config NTP_NTPDATE
>         bool
>         prompt "install ntpdate"
>         depends on NTP
>
>
> Obviously one would not want to run two ntp services at the same time, but
> since busybox lacks an ntpdate command, there are cases where one would
> want to use ntpdate from the NTP package while still using Busybox's ntpd
> for everything else.
>
> My question is: Is there any reason why this wouldn't work? Was the
> "depends on !BUSYBOX_NTPD" line added just to avoid the possibility of the
> two ntp services running at the same time? Or is it there to guard from
> other possible problems/issues?

We usually add those lines only to prevent two packages from installing the
same file. In this case we have the !BUSYBOX_NTPD check twice, once for the
package and once for ntpd. This is clearly wrong. I don't see a reason why
the check for the packages is needed and I don't remember why I added it. I
suggest you remove the check (and the comment at the end of the file) and
see what happens.