sonic-buildimage/dockers/docker-dhcp-relay/wait_for_intf.sh.j2

#!/usr/bin/env bash

STATE_DB_IDX="6"

PORT_TABLE_PREFIX="PORT_TABLE"
VLAN_TABLE_PREFIX="VLAN_TABLE"
LAG_TABLE_PREFIX="LAG_TABLE"

function wait_until_iface_ready
{
    TABLE_PREFIX=$1
    IFACE=$2

    echo "Waiting until interface $IFACE is ready..."

    # Wait for the interface to come up
    # (i.e., interface is present in STATE_DB and state is "ok")
    while true; do
        RESULT=$(redis-cli -n ${STATE_DB_IDX} HGET "${TABLE_PREFIX}|${IFACE}" "state" 2> /dev/null)
        if [ x"$RESULT" == x"ok" ]; then
            break
        fi

        sleep 1
    done

    echo "Interface ${IFACE} is ready!"
}


# Wait for all interfaces to be up and ready
{% for (name, prefix) in INTERFACE|pfx_filter %}
wait_until_iface_ready ${PORT_TABLE_PREFIX} {{ name }}
{% endfor %}
{% for (name, prefix) in VLAN_INTERFACE|pfx_filter %}
wait_until_iface_ready ${VLAN_TABLE_PREFIX} {{ name }}
{% endfor %}
{% for (name, prefix) in PORTCHANNEL_INTERFACE|pfx_filter %}
wait_until_iface_ready ${LAG_TABLE_PREFIX} {{ name }}
{% endfor %}