package/base-files/files/lib/config/uci.sh

   1 #!/bin/sh
   2 # Shell script defining macros for manipulating config files
   3 #
   4 # Copyright (C) 2006        Fokus Fraunhofer <carsten.tittel@fokus.fraunhofer.de>
   5 # Copyright (C) 2006,2007   Felix Fietkau <nbd@openwrt.org>
   6 #
   7 # This program is free software; you can redistribute it and/or modify
   8 # it under the terms of the GNU General Public License as published by
   9 # the Free Software Foundation; either version 2 of the License, or
  10 # (at your option) any later version.
  11 #
  12 # This program is distributed in the hope that it will be useful,
  13 # but WITHOUT ANY WARRANTY; without even the implied warranty of
  14 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
  15 # General Public License for more details.
  16 #
  17 # You should have received a copy of the GNU General Public License
  18 # along with this program; if not, write to the Free Software
  19 # Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
  20
  21 uci_load() {
  22         config_load "$1"
  23 }
  24
  25 uci_apply_defaults() {(
  26         cd /etc/uci-defaults || return 0
  27         files="$(ls)"
  28         [ -z "$files" ] && return 0
  29         mkdir -p /tmp/.uci
  30         for file in $files; do
  31                 ( . "./$(basename $file)" ) && rm -f "$file"
  32         done
  33         uci commit
  34 )}
  35
  36 uci_call_awk() {
  37         local CMD="$*"
  38         awk -f $UCI_ROOT/lib/config/uci.awk -f - <<EOF
  39 BEGIN {
  40         $CMD
  41 }
  42 EOF
  43 }
  44
  45 uci_do_update() {
  46         local FILENAME="$1"
  47         local UPDATE="$2"
  48         uci_call_awk "
  49         config = read_file(\"$FILENAME\")
  50         $UPDATE
  51         print config
  52 "
  53 }
  54
  55 uci_add_update() {
  56         local PACKAGE="$1"
  57         local UPDATE="$2"
  58         local PACKAGE_BASE="$(basename "$PACKAGE")"
  59         local UCIFILE
  60
  61         case "$PACKAGE" in
  62                 /*) UCIFILE="$PACKAGE";;
  63                 *)
  64                         UCIFILE="/tmp/.uci/$PACKAGE_BASE"
  65                         mkdir -p "/tmp/.uci"
  66                 ;;
  67         esac
  68
  69         # FIXME: add locking?
  70         echo "$UPDATE" >> "$UCIFILE"
  71 }
  72
  73 uci_set() {
  74         local PACKAGE="$1"
  75         local CONFIG="$2"
  76         local OPTION="$3"
  77         local VALUE="$4"
  78
  79         case "$PACKAGE" in
  80                 /*)
  81                         uci_add_update "$PACKAGE" "config_set '$CONFIG' '$OPTION' '$VALUE'"
  82                 ;;
  83                 *)
  84                         ( # spawn a subshell so you don't mess up the current environment
  85                                 uci_load "$PACKAGE"
  86                                 config_get OLDVAL "$CONFIG" "$OPTION"
  87                                 if [ "x$OLDVAL" != "x$VALUE" ]; then
  88                                         config_get type "$CONFIG" TYPE
  89                                         [ -z "$type" ]
  90                                 fi
  91                         ) || uci_add_update "$PACKAGE" "config_set '$CONFIG' '$OPTION' '$VALUE'"
  92                 ;;
  93         esac
  94 }
  95
  96 uci_add() {
  97         local PACKAGE="$1"
  98         local TYPE="$2"
  99         local CONFIG="$3"
 100
 101         uci_add_update "$PACKAGE" "config '$TYPE' '$CONFIG'"
 102 }
 103
 104 uci_rename() {
 105         local PACKAGE="$1"
 106         local CONFIG="$2"
 107         local VALUE="$3"
 108
 109         uci_add_update "$PACKAGE" "config_rename '$CONFIG' '$VALUE'"
 110 }
 111
 112 uci_remove() {
 113         local PACKAGE="$1"
 114         local CONFIG="$2"
 115         local OPTION="$3"
 116
 117         if [ -z "$OPTION" ]; then
 118                 uci_add_update "$PACKAGE" "config_clear '$CONFIG'"
 119         else
 120                 uci_add_update "$PACKAGE" "config_unset '$CONFIG' '$OPTION'"
 121         fi
 122 }
 123
 124 uci_commit() {
 125         local PACKAGE="$1"
 126         local PACKAGE_BASE="$(basename "$PACKAGE")"
 127
 128         case "$PACKAGE" in
 129                 /*) return 0;;
 130         esac
 131         mkdir -p /tmp/.uci
 132         LOCK=`which lock` || LOCK=:
 133         $LOCK "/tmp/.uci/$PACKAGE_BASE.lock"
 134         [ -f "/tmp/.uci/$PACKAGE_BASE" ] && (
 135                 updatestr=""
 136
 137                 # replace handlers
 138                 config() {
 139                         append updatestr "config = uci_update_config(config, \"@$2=$1\")" "$N"
 140                 }
 141                 option() {
 142                         append updatestr "config = uci_update_config(config, \"$CONFIG_SECTION.$1=$2\")" "$N"
 143                 }
 144                 config_rename() {
 145                         append updatestr "config = uci_update_config(config, \"&$1=$2\")" "$N"
 146                 }
 147                 config_unset() {
 148                         append updatestr "config = uci_update_config(config, \"-$1.$2\")" "$N"
 149                 }
 150                 config_clear() {
 151                         append updatestr "config = uci_update_config(config, \"-$1\")" "$N"
 152                 }
 153
 154                 . "/tmp/.uci/$PACKAGE_BASE"
 155
 156                 # completely disable handlers so that they don't get in the way
 157                 config() {
 158                         return 0
 159                 }
 160                 option() {
 161                         return 0
 162                 }
 163
 164                 config_load "$PACKAGE"
 165                 CONFIG_FILENAME="${CONFIG_FILENAME:-$UCI_ROOT/etc/config/$PACKAGE_BASE}"
 166                 uci_do_update "$CONFIG_FILENAME" "$updatestr" > "/tmp/.uci/$PACKAGE_BASE.new" && {
 167                         mv -f "/tmp/.uci/$PACKAGE_BASE.new" "$CONFIG_FILENAME" && \
 168                         rm -f "/tmp/.uci/$PACKAGE_BASE"
 169                 }
 170         )
 171         $LOCK -u "/tmp/.uci/$PACKAGE_BASE.lock"
 172 }
 173
 174