# Sample dhcpcd hook for ypbind
# This script is only suitable for the BSD versions.

: ${ypbind_restart_cmd:=service_command ypbind restart}
: ${ypbind_stop_cmd:=service_condcommand ypbind stop}
ypbind_dir="$state_dir/ypbind"
: ${ypdomain_dir:=/var/yp}
: ${ypdomain_suffix:=.ypservers}

best_domain()
{
       for i in "$ypbind_dir/$interface_order".*; do
               if [ -f "$i" ]; then
                       cat "$i"
                       return 0
               fi
       done
       return 1
}

make_yp_binding()
{
       [ -d "$ypbind_dir" ] || mkdir -p "$ypbind_dir"
       echo "$new_nis_domain" >"$ypbind_dir/$ifname"

       if [ -z "$ypdomain_dir" ]; then
               false
       else
               cf="$ypdomain_dir/$new_nis_domain$ypdomain_suffix"
               if [ -n "$new_nis_servers" ]; then
                       ncf="$cf.$ifname"
                       rm -f "$ncf"
                       for x in $new_nis_servers; do
                               echo "$x" >>"$ncf"
                       done
                       change_file "$cf" "$ncf"
               else
                       [ -e "$cf" ] && rm "$cf"
               fi
       fi

       nd="$(best_domain)"
       if [ $? = 0 ] && [ "$nd" != "$(domainname)" ]; then
               domainname "$nd"
               if [ -n "$ypbind_restart_cmd" ]; then
                       eval $ypbind_restart_cmd
               fi
       fi
}

restore_yp_binding()
{
       rm -f "$ypbind_dir/$ifname"
       nd="$(best_domain)"
       # We need to stop ypbind if there is no best domain
       # otherwise it will just stall as we cannot set domainname
       # to blank :/
       if [ -z "$nd" ]; then
               if [ -n "$ypbind_stop_cmd" ]; then
                       eval $ypbind_stop_cmd
               fi
       elif [ "$nd" != "$(domainname)" ]; then
               domainname "$nd"
               if [ -n "$ypbind_restart_cmd" ]; then
                       eval $ypbind_restart_cmd
               fi
       fi
}

if ! $if_configured; then
       ;
elif [ "$reason" = PREINIT ]; then
       rm -f "$ypbind_dir/$interface".*
elif $if_up || $if_down; then
       if [ -n "$new_nis_domain" ]; then
               if valid_domainname "$new_nis_domain"; then
                       make_yp_binding
               else
                       syslog err "Invalid NIS domain name: $new_nis_domain"
               fi
       elif [ -n "$old_nis_domain" ]; then
               restore_yp_binding
       fi
fi

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