openwrt/package/base-files/default/etc/functions.sh

   1 #!/bin/sh
   2 # Copyright (C) 2006 OpenWrt.org
   3
   4 alias debug=${DEBUG:-:}
   5
   6 # newline
   7 N="
   8 "
   9
  10 _C=0
  11
  12 # valid interface?
  13 if_valid () (
  14   ifconfig "$1" >&- 2>&- ||
  15   [ "${1%%[0-9]}" = "br" ] ||
  16   { debug "# missing interface '$1' ignored"; false; }
  17 )
  18
  19 hotplug_dev() {
  20         env -i ACTION=$1 INTERFACE=$2 /sbin/hotplug net
  21 }
  22
  23 append() {
  24         local var="$1"
  25         local value="$2"
  26         local sep="${3:- }"
  27         eval "export ${var}=\"\${${var}:+\${${var}}${value:+$sep}}$value\""
  28 }
  29
  30 reset_cb() {
  31         config_cb() {
  32                 return 0
  33         }
  34         option_cb() {
  35                 return 0
  36         }
  37 }
  38 reset_cb
  39
  40 config () {
  41         _C=$(($_C + 1))
  42         name="${name:-cfg${_C}}"
  43         config_cb "$1" "$2"
  44         export CONFIG_SECTION="$2"
  45         export CONFIG_${CONFIG_SECTION}_TYPE="$1"
  46 }
  47
  48 option () {
  49         local varname="$1" ; shift
  50         export CONFIG_${CONFIG_SECTION}_${varname}="$*"
  51         option_cb "$varname" "$*"
  52 }
  53
  54 config_clear() {
  55         [ -z "$CONFIG_SECTION" ] && return
  56         for oldsetting in `set | grep ^CONFIG_${CONFIG_SECTION}_ | \
  57                 sed -e 's/\(.*\)=.*$/\1/'` ; do
  58                 unset $oldsetting
  59         done
  60         unset CONFIG_SECTION
  61 }
  62
  63 config_load() {
  64         local DIR="./"
  65         _C=0
  66         [ \! -e "$1" -a -e "/etc/config/$1" ] && {
  67                 DIR="/etc/config/"
  68         }
  69         [ -e "$DIR$1" ] && {
  70                 CONFIG_FILENAME="$DIR$1"
  71                 . ${CONFIG_FILENAME}
  72         } || return 1
  73         ${CD:+cd -} >/dev/null
  74         ${CONFIG_SECTION:+config_cb}
  75 }
  76
  77 config_get() {
  78         case "$3" in
  79                 "") eval "echo \${CONFIG_${1}_${2}}";;
  80                 *) eval "$1=\"\${CONFIG_${2}_${3}}\"";;
  81         esac
  82 }
  83
  84 config_set() {
  85         export CONFIG_${1}_${2}="${3}"
  86 }
  87
  88 load_modules() {
  89         sed 's/^[^#]/insmod &/' $* | ash 2>&- || :
  90 }