package/firewall/files/lib/config.sh

   1 # Copyright (C) 2009-2010 OpenWrt.org
   2 # Copyright (C) 2009 Malte S. Stretz <http://msquadrat.de>
   3 #
   4 # This is a temporary file, I hope to have some of this stuff merged into
   5 # /lib/functions.sh (without the fw_ prefix of course) one day.
   6
   7 fw_config_append() { # <package>
   8         CONFIG_APPEND=1 config_load "$@"
   9         unset CONFIG_APPEND
  10 }
  11
  12 fw_config_once() { # <function> <type>
  13         local func=$1
  14         local type=$2
  15         shift 2
  16
  17         local config=cfg00nil
  18         fw_config__once() {
  19                 config=$1
  20         }
  21         config_foreach fw_config__once "$type"
  22
  23         $func $config "$@"
  24 }
  25
  26 fw_config_get_section() { # <config> <prefix> <type> <name> <default> ...
  27         local config=$1
  28         local prefix=$2
  29         shift 2
  30
  31         [ -n "$config" ] || return 1
  32         [ -n "$prefix" ] && {
  33                 prefix="${prefix}_"
  34                 export ${NO_EXPORT:+-n} -- "${prefix}NAME"="${config}"
  35                 config_get "${prefix}TYPE" "$config" TYPE
  36         }
  37
  38         [ "$1" == '{' ] && shift
  39         while [ $# -ge 3 ]; do
  40                 local type=$1
  41                 local name=$2
  42                 local dflt=$3
  43                 shift 3
  44                 # TODO: Move handling of defaults to /lib/functions.sh
  45                 # and get replace the case block with the following
  46                 # two lines:
  47                 # type=${type#string}
  48                 # config_get${type:+_${type}} "${prefix}${name}" "$config" "$name" "$dflt" || return
  49                 case "$type" in
  50                         string)
  51                                 local tmp
  52                                 config_get tmp "$config" "$name" || return
  53                                 [ -z "$tmp" ] && tmp=$dflt
  54                                 export ${NO_EXPORT:+-n} -- "${prefix}${name}=${tmp}"
  55                                 continue
  56                         ;;
  57                         boolean)
  58                                 type=bool
  59                         ;;
  60                 esac;
  61
  62                 local cmd=${prefix}config_get_${type}
  63                 type $cmd > /dev/null || {
  64                         cmd=config_get_${type}
  65                 }
  66                 type $cmd > /dev/null || {
  67                         echo "config type $type (for $name) not supported" >&2
  68                         return 1
  69                 }
  70                 $cmd "${prefix}${name}" "$config" "$name" "$dflt" || return
  71         done
  72 }
  73
  74 config_get_ipaddr() {
  75         local varn=$1
  76         local conf=$2
  77         local name=$3
  78         local dflt=$4
  79
  80         local addr
  81         config_get addr "$conf" "$name" || return
  82         [ -n "$addr" ] || addr=$dflt
  83
  84         local mask=${addr#*/}
  85         [ "$mask" != "$addr" ] || mask=
  86         addr=${addr%/*}
  87
  88         local vers=
  89         case "$addr" in
  90                 *:*) vers=6; mask="${mask:-128}" ;;
  91                 *.*) vers=4; mask="${mask:-32}" ;;
  92         esac
  93
  94         export ${NO_EXPORT:+-n} -- "${varn}=${addr}"
  95         export ${NO_EXPORT:+-n} -- "${varn}_prefixlen=${mask}"
  96         export ${NO_EXPORT:+-n} -- "${varn}_version=${vers}"
  97 }