add common functions for the new config file format

git-svn-id: svn://svn.openwrt.org/openwrt/trunk@3751 3c298f89-4303-0410-b956-a3cf2f4a3e73

diff --git a/openwrt/package/base-files/default/etc/functions.sh b/openwrt/package/base-files/default/etc/functions.sh
index 526ca52..858dc28 100755 (executable)
--- a/openwrt/package/base-files/default/etc/functions.sh
+++ b/openwrt/package/base-files/default/etc/functions.sh
@@ -11,3 +11,53 @@ if_valid () (
 hotplug_dev() {
        env -i ACTION=$1 INTERFACE=$2 /sbin/hotplug net
 }
+
+config_cb() {
+       return 0
+}
+option_cb() {
+       return 0
+}
+
+config () {
+       config_cb "$@"
+       _C=$((${_C:-0} + 1))
+       export CONFIG_SECTION="${2:-cfg${_C}}"
+       export CONFIG_${CONFIG_SECTION}_TYPE="$1"
+}
+
+option () {
+       local varname="$1" ; shift
+       export CONFIG_${CONFIG_SECTION}_${varname}="$*"
+       option_cb "$varname" "$*"
+}
+
+config_clear() {
+       [ -z "$CONFIG_SECTION" ] && return
+       for oldsetting in `set | grep ^CONFIG_${CONFIG_SECTION}_ | \
+               sed -e 's/\(.*\)=.*$/\1/'` ; do 
+               unset $oldsetting 
+       done
+       unset CONFIG_SECTION
+}
+
+config_load() {
+       local CD=""
+       if [ \! -e "$1" -a -e "/etc/config/$1" ]; then
+               cd /etc/config && local CD=1
+       fi
+       [ -e "$1" ] && . $1
+       ${CD:+cd - >/dev/null}
+       ${CONFIG_SECTION:+config_cb}
+}
+
+config_get() {
+       case "$3" in
+               "") eval "echo \${CONFIG_${1}_${2}}";;
+               *) eval "$1=\"\${CONFIG_${2}_${3}}\"";;
+       esac
+}
+
+config_set() {
+       export CONFIG_${1}_${2}="${3}"
+}