[Buildroot] [PATCH 1/7 v3] package/busybox: Add facility for DHCP hooks

[Arnout Vandecappelle <arnout@mind.be>]

On 17/06/14 07:21, Jeremy Kerr wrote:
> The (u)dhcpc hook installed by the busybox package configures the
> network and exits. If we want to do anything further with a DHCP lease,
> we'd have to replace the script entirely.
> 
> This change introduces a .d directory for hooks (based on the script
> filename), which are executed after the interface configuration. This
> allows packages to drop a script file in the .d directory to perform
> actions on DHCP events.
> 
> We'll use this in a later change to notify petitboot of DHCP boot
> information.
> 
> Signed-off-by: Jeremy Kerr <jk@ozlabs.org>

Acked-by: Arnout Vandecappelle (Essensium/Mind) <arnout@mind.be>

 I could do some nitpicking but it's good enough as it is.

 Regards,
 Arnout

> 
> ---
>  package/busybox/busybox.mk    |    2 ++
>  package/busybox/udhcpc.script |    6 ++++++
>  2 files changed, 8 insertions(+)
> 
> diff --git a/package/busybox/busybox.mk b/package/busybox/busybox.mk
> index c368b80..bddeb63 100644
> --- a/package/busybox/busybox.mk
> +++ b/package/busybox/busybox.mk
> @@ -222,6 +222,8 @@ define BUSYBOX_INSTALL_TARGET_CMDS
>  	if [ ! -f $(TARGET_DIR)/usr/share/udhcpc/default.script ]; then \
>  		$(INSTALL) -m 0755 -D package/busybox/udhcpc.script \
>  			$(TARGET_DIR)/usr/share/udhcpc/default.script; \
> +		$(INSTALL) -m 755 -d \
> +			$(TARGET_DIR)/usr/share/udhcpc/default.script.d; \
>  	fi
>  	$(BUSYBOX_INSTALL_MDEV_SCRIPT)
>  	$(BUSYBOX_INSTALL_MDEV_CONF)
> diff --git a/package/busybox/udhcpc.script b/package/busybox/udhcpc.script
> index e23d1f1..50c52e6 100755
> --- a/package/busybox/udhcpc.script
> +++ b/package/busybox/udhcpc.script
> @@ -64,4 +64,10 @@ case "$1" in
>  		;;
>  esac
>  
> +HOOK_DIR="$0.d"
> +for hook in "${HOOK_DIR}/"*; do
> +    [ -f "${hook}" -a -x "${hook}" ] || continue
> +    "${hook}" "${@}"
> +done
> +
>  exit 0
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> 


-- 
Arnout Vandecappelle                          arnout at mind be
Senior Embedded Software Architect            +32-16-286500
Essensium/Mind                                http://www.mind.be
G.Geenslaan 9, 3001 Leuven, Belgium           BE 872 984 063 RPR Leuven
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