keep uci_set from saving things that have not changed

[openwrt/staging/chunkeey.git] / package / base-files / files / lib / config / uci.sh

diff --git a/package/base-files/files/lib/config/uci.sh b/package/base-files/files/lib/config/uci.sh
old mode 100755 (executable)
new mode 100644 (file)
index 12795d8..e029336
--- a/package/base-files/files/lib/config/uci.sh
+++ b/package/base-files/files/lib/config/uci.sh
@@ -1,8 +1,8 @@
 #!/bin/sh
 # Shell script defining macros for manipulating config files
 #
-# Copyright (C) 2006 by Fokus Fraunhofer <carsten.tittel@fokus.fraunhofer.de>
-# Copyright (C) 2006 by Felix Fietkau <nbd@openwrt.org>
+# 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
@@ -28,16 +28,34 @@ uci_load() {
        }
 }
 
+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_call_awk() {
+       local CMD="$*"
+       awk -f $UCI_ROOT/lib/config/uci.awk -f - <<EOF
+BEGIN {
+       $CMD
+}
+EOF
+}
+
 uci_do_update() {
        local FILENAME="$1"
        local UPDATE="$2"
-       awk -f /lib/config/uci-update.awk -f - <<EOF
-BEGIN {
-       config = read_file("$FILENAME")
+       uci_call_awk "
+       config = read_file(\"$FILENAME\")
        $UPDATE
        print config
-}
-EOF
+"
 }
 
 uci_add_update() {
@@ -58,9 +76,12 @@ uci_set() {
 
        ( # 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'"
+               config_get OLDVAL "$CONFIG" "$OPTION"
+               if [ "$OLDVAL" != "$VALUE" ]; then
+                       config_get type "$CONFIG" TYPE
+                       [ -z "$type" ]
+               fi
+       ) || uci_add_update "$PACKAGE" "config_set '$CONFIG' '$OPTION' '$VALUE'"
 }
 
 uci_add() {
@@ -94,27 +115,28 @@ uci_remove() {
 uci_commit() {
        local PACKAGE="$1"
        local PACKAGE_BASE="$(basename "$PACKAGE")"
-       
+
        mkdir -p /tmp/.uci
-       lock "/tmp/.uci/$PACKAGE_BASE.lock"
+       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"
+                       append updatestr "config = uci_update_config(config, \"@$2=$1\")" "$N"
                }
                option() {
-                       append updatestr "config = update_config(config, \"$CONFIG_SECTION.$1=$2\")" "$N"
+                       append updatestr "config = uci_update_config(config, \"$CONFIG_SECTION.$1=$2\")" "$N"
                }
                config_rename() {
-                       append updatestr "config = update_config(config, \"&$1=$2\")" "$N"
+                       append updatestr "config = uci_update_config(config, \"&$1=$2\")" "$N"
                }
                config_unset() {
-                       append updatestr "config = update_config(config, \"-$1.$2\")" "$N"
+                       append updatestr "config = uci_update_config(config, \"-$1.$2\")" "$N"
                }
                config_clear() {
-                       append updatestr "config = update_config(config, \"-$1\")" "$N"
+                       append updatestr "config = uci_update_config(config, \"-$1\")" "$N"
                }
                
                . "/tmp/.uci/$PACKAGE_BASE"
@@ -128,13 +150,13 @@ uci_commit() {
                }
                
                config_load "$PACKAGE"
-               CONFIG_FILENAME="${CONFIG_FILENAME:-$ROOT/etc/config/$PACKAGE_BASE}"
+               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"
+       $LOCK -u "/tmp/.uci/$PACKAGE_BASE.lock"
 }