Add an 'Image Configuration' menu to menuconfig
[openwrt.org/openwrt.git] / package / base-files / files / lib / config / uci.sh
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#!/bin/sh
# Shell script defining macros for manipulating config files
#
# Copyright (C) 2006        Fokus Fraunhofer <carsten.tittel@fokus.fraunhofer.de>
# Copyright (C) 2006,2007   Felix Fietkau <nbd@openwrt.org>
#
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation; either version 2 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
# General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program; if not, write to the Free Software
# Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
 
uci_load() {
        local PACKAGE="$1"
        config_load "$PACKAGE"
        local PACKAGE_BASE="$(basename "$PACKAGE")"
        [ -f "/tmp/.uci/${PACKAGE_BASE}" ] && {
                . "/tmp/.uci/${PACKAGE_BASE}" 2>/dev/null >/dev/null
                config_cb
        }
}
 
uci_apply_defaults() {(
        cd /etc/uci-defaults || return 0
        files="$(ls)"
        [ -z "$files" ] && return 0
        mkdir -p /tmp/.uci
        for file in $files; do
                ( . "./$(basename $file)" ) && rm -f "$file"
        done
        uci commit
)}
 
uci_do_update() {
        local FILENAME="$1"
        local UPDATE="$2"
        awk -f $UCI_ROOT/lib/config/uci-update.awk -f - <<EOF
BEGIN {
        config = read_file("$FILENAME")
        $UPDATE
        print config
}
EOF
}
 
uci_add_update() {
        local PACKAGE="$1"
        local UPDATE="$2"
        local PACKAGE_BASE="$(basename "$PACKAGE")"
        
        # FIXME: add locking?
        mkdir -p "/tmp/.uci"
        echo "$UPDATE" >> "/tmp/.uci/${PACKAGE_BASE}"
}
 
uci_set() {
        local PACKAGE="$1"
        local CONFIG="$2"
        local OPTION="$3"
        local VALUE="$4"
 
        ( # spawn a subshell so you don't mess up the current environment
                uci_load "$PACKAGE"
                config_get type "$CONFIG" TYPE
                [ -z "$type" ]
        ) || uci_add_update "$PACKAGE" "CONFIG_SECTION='$CONFIG'${N}option '$OPTION' '$VALUE'"
}
 
uci_add() {
        local PACKAGE="$1"
        local TYPE="$2"
        local CONFIG="$3"
 
        uci_add_update "$PACKAGE" "config '$TYPE' '$CONFIG'"
}
 
uci_rename() {
        local PACKAGE="$1"
        local CONFIG="$2"
        local VALUE="$3"
 
        uci_add_update "$PACKAGE" "config_rename '$CONFIG' '$VALUE'"
}
 
uci_remove() {
        local PACKAGE="$1"
        local CONFIG="$2"
        local OPTION="$3"
 
        if [ -z "$OPTION" ]; then
                uci_add_update "$PACKAGE" "config_clear '$CONFIG'"
        else
                uci_add_update "$PACKAGE" "config_unset '$CONFIG' '$OPTION'"
        fi
}
 
uci_commit() {
        local PACKAGE="$1"
        local PACKAGE_BASE="$(basename "$PACKAGE")"
 
        mkdir -p /tmp/.uci
        LOCK=`which lock` || LOCK=:
        $LOCK "/tmp/.uci/$PACKAGE_BASE.lock"
        [ -f "/tmp/.uci/$PACKAGE_BASE" ] && (
                updatestr=""
                
                # replace handlers
                config() {
                        append updatestr "config = update_config(config, \"@$2=$1\")" "$N"
                }
                option() {
                        append updatestr "config = update_config(config, \"$CONFIG_SECTION.$1=$2\")" "$N"
                }
                config_rename() {
                        append updatestr "config = update_config(config, \"&$1=$2\")" "$N"
                }
                config_unset() {
                        append updatestr "config = update_config(config, \"-$1.$2\")" "$N"
                }
                config_clear() {
                        append updatestr "config = update_config(config, \"-$1\")" "$N"
                }
                
                . "/tmp/.uci/$PACKAGE_BASE"
 
                # completely disable handlers so that they don't get in the way
                config() {
                        return 0
                }
                option() {
                        return 0
                }
                
                config_load "$PACKAGE"
                CONFIG_FILENAME="${CONFIG_FILENAME:-$UCI_ROOT/etc/config/$PACKAGE_BASE}"
                uci_do_update "$CONFIG_FILENAME" "$updatestr" > "/tmp/.uci/$PACKAGE_BASE.new" && {
                        mv -f "/tmp/.uci/$PACKAGE_BASE.new" "$CONFIG_FILENAME" && \
                        rm -f "/tmp/.uci/$PACKAGE_BASE"
                } 
        )
        $LOCK -u "/tmp/.uci/$PACKAGE_BASE.lock"
}
 
 
 
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