contrib/dhcpcd/hooks/50-ypbind.in

   1 # Sample dhcpcd hook for ypbind
   2 # This script is only suitable for the BSD versions.
   3
   4 : ${ypbind_restart_cmd:=service_command ypbind restart}
   5 : ${ypbind_stop_cmd:=service_condcommand ypbind stop}
   6 ypbind_dir="$state_dir/ypbind"
   7 : ${ypdomain_dir:=@YPDOMAIN_DIR@}
   8 : ${ypdomain_suffix:=@YPDOMAIN_SUFFIX@}
   9
  10
  11 best_domain()
  12 {
  13         for i in "$ypbind_dir/$interface_order".*; do
  14                 if [ -f "$i" ]; then
  15                         cat "$i"
  16                         return 0
  17                 fi
  18         done
  19         return 1
  20 }
  21
  22 make_yp_binding()
  23 {
  24         [ -d "$ypbind_dir" ] || mkdir -p "$ypbind_dir"
  25         echo "$new_nis_domain" >"$ypbind_dir/$ifname"
  26
  27         if [ -z "$ypdomain_dir" ]; then
  28                 false
  29         else
  30                 cf="$ypdomain_dir/$new_nis_domain$ypdomain_suffix"
  31                 if [ -n "$new_nis_servers" ]; then
  32                         ncf="$cf.$ifname"
  33                         rm -f "$ncf"
  34                         for x in $new_nis_servers; do
  35                                 echo "$x" >>"$ncf"
  36                         done
  37                         change_file "$cf" "$ncf"
  38                 else
  39                         [ -e "$cf" ] && rm "$cf"
  40                 fi
  41         fi
  42
  43         nd="$(best_domain)"
  44         if [ $? = 0 -a "$nd" != "$(domainname)" ]; then
  45                 domainname "$nd"
  46                 if [ -n "$ypbind_restart_cmd" ]; then
  47                         eval $ypbind_restart_cmd
  48                 fi
  49         fi
  50 }
  51
  52 restore_yp_binding()
  53 {
  54         rm -f "$ypbind_dir/$ifname"
  55         nd="$(best_domain)"
  56         # We need to stop ypbind if there is no best domain
  57         # otherwise it will just stall as we cannot set domainname
  58         # to blank :/
  59         if [ -z "$nd" ]; then
  60                 if [ -n "$ypbind_stop_cmd" ]; then
  61                         eval $ypbind_stop_cmd
  62                 fi
  63         elif [ "$nd" != "$(domainname)" ]; then
  64                 domainname "$nd"
  65                 if [ -n "$ypbind_restart_cmd" ]; then
  66                         eval $ypbind_restart_cmd
  67                 fi
  68         fi
  69 }
  70
  71 if [ "$reason" = PREINIT ]; then
  72         rm -f "$ypbind_dir/$interface".*
  73 elif $if_up || $if_down; then
  74         if [ -n "$new_nis_domain" ]; then
  75                 if valid_domainname "$new_nis_domain"; then
  76                         make_yp_binding
  77                 else
  78                         syslog err "Invalid NIS domain name: $new_nis_domain"
  79                 fi
  80         elif [ -n "$old_nis_domain" ]; then
  81                 restore_yp_binding
  82         fi
  83 fi