On 08-03-21, Alexey Dobrovolsky wrote:
> NTPD in busybox has option -I to bind server to IFACE.
> However, capabilities of the busybox are limited, the -I option cannot be
> repeated and only one interface can be effectively specified in it.
> This option is currently not configurable via UCI.
> The patch adds an interface option to the system config, ntp section.
> Also sort options for uci_load_validate alphabetically.

NACK, this is a new feature: we don't typically backport features at this
stage of a release.

Especially in this case, it's not a trivial feature to get right, and the
subsequent fix is too invasive to be backported in 19.07.

Baptiste

> Signed-off-by: Alexey Dobrovolsky <dobrovolskiy.ale...@gmail.com>
> (cherry picked from commit e12fcf0fe5597467f7cc21144e5f4da60500ebd2)
> ---
>  package/utils/busybox/files/sysntpd | 12 ++++++++++--
>  1 file changed, 10 insertions(+), 2 deletions(-)
> 
> diff --git a/package/utils/busybox/files/sysntpd 
> b/package/utils/busybox/files/sysntpd
> index 52866ba32a..511561a4bb 100755
> --- a/package/utils/busybox/files/sysntpd
> +++ b/package/utils/busybox/files/sysntpd
> @@ -30,7 +30,12 @@ get_dhcp_ntp_servers() {
>  
>  validate_ntp_section() {
>       uci_load_validate system timeserver "$1" "$2" \
> -             'server:list(host)' 'enabled:bool:1' 'enable_server:bool:0' 
> 'use_dhcp:bool:1' 'dhcp_interface:list(string)'
> +             'dhcp_interface:list(string)' \
> +             'enable_server:bool:0' \
> +             'enabled:bool:1' \
> +             'interface:string' \
> +             'server:list(host)' \
> +             'use_dhcp:bool:1'
>  }
>  
>  start_ntpd_instance() {
> @@ -49,7 +54,10 @@ start_ntpd_instance() {
>  
>       procd_open_instance
>       procd_set_param command "$PROG" -n -N
> -     [ "$enable_server" = "1" ] && procd_append_param command -l
> +     if [ "$enable_server" = "1" ]; then
> +             procd_append_param command -l
> +             [ -n "$interface" ] && procd_append_param command -I $interface
> +     fi
>       [ -x "$HOTPLUG_SCRIPT" ] && procd_append_param command -S 
> "$HOTPLUG_SCRIPT"
>       for peer in $server; do
>               procd_append_param command -p $peer

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