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         local PACKAGE="$1"
  23         config_load "$PACKAGE"
  24         local PACKAGE_BASE="$(basename "$PACKAGE")"
  25         [ -f "/tmp/.uci/${PACKAGE_BASE}" ] && {
  26                 . "/tmp/.uci/${PACKAGE_BASE}" 2>/dev/null >/dev/null
  27                 config_cb
  28         }
  29 }
  30
  31 uci_apply_defaults() {(
  32         cd /etc/uci-defaults || return 0
  33         files="$(ls)"
  34         [ -z "$files" ] && return 0
  35         mkdir -p /tmp/.uci
  36         for file in $files; do
  37                 ( . "./$(basename $file)" ) && rm -f "$file"
  38         done
  39         uci commit
  40 )}
  41
  42 uci_do_update() {
  43         local FILENAME="$1"
  44         local UPDATE="$2"
  45         awk -f $UCI_ROOT/lib/config/uci-update.awk -f - <<EOF
  46 BEGIN {
  47         config = read_file("$FILENAME")
  48         $UPDATE
  49         print config
  50 }
  51 EOF
  52 }
  53
  54 uci_add_update() {
  55         local PACKAGE="$1"
  56         local UPDATE="$2"
  57         local PACKAGE_BASE="$(basename "$PACKAGE")"
  58
  59         # FIXME: add locking?
  60         mkdir -p "/tmp/.uci"
  61         echo "$UPDATE" >> "/tmp/.uci/${PACKAGE_BASE}"
  62 }
  63
  64 uci_set() {
  65         local PACKAGE="$1"
  66         local CONFIG="$2"
  67         local OPTION="$3"
  68         local VALUE="$4"
  69
  70         ( # spawn a subshell so you don't mess up the current environment
  71                 uci_load "$PACKAGE"
  72                 config_get type "$CONFIG" TYPE
  73                 [ -z "$type" ]
  74         ) || uci_add_update "$PACKAGE" "CONFIG_SECTION='$CONFIG'${N}option '$OPTION' '$VALUE'"
  75 }
  76
  77 uci_add() {
  78         local PACKAGE="$1"
  79         local TYPE="$2"
  80         local CONFIG="$3"
  81
  82         uci_add_update "$PACKAGE" "config '$TYPE' '$CONFIG'"
  83 }
  84
  85 uci_rename() {
  86         local PACKAGE="$1"
  87         local CONFIG="$2"
  88         local VALUE="$3"
  89
  90         uci_add_update "$PACKAGE" "config_rename '$CONFIG' '$VALUE'"
  91 }
  92
  93 uci_remove() {
  94         local PACKAGE="$1"
  95         local CONFIG="$2"
  96         local OPTION="$3"
  97
  98         if [ -z "$OPTION" ]; then
  99                 uci_add_update "$PACKAGE" "config_clear '$CONFIG'"
 100         else
 101                 uci_add_update "$PACKAGE" "config_unset '$CONFIG' '$OPTION'"
 102         fi
 103 }
 104
 105 uci_commit() {
 106         local PACKAGE="$1"
 107         local PACKAGE_BASE="$(basename "$PACKAGE")"
 108
 109         mkdir -p /tmp/.uci
 110         LOCK=`which lock` || LOCK=:
 111         $LOCK "/tmp/.uci/$PACKAGE_BASE.lock"
 112         [ -f "/tmp/.uci/$PACKAGE_BASE" ] && (
 113                 updatestr=""
 114
 115                 # replace handlers
 116                 config() {
 117                         append updatestr "config = update_config(config, \"@$2=$1\")" "$N"
 118                 }
 119                 option() {
 120                         append updatestr "config = update_config(config, \"$CONFIG_SECTION.$1=$2\")" "$N"
 121                 }
 122                 config_rename() {
 123                         append updatestr "config = update_config(config, \"&$1=$2\")" "$N"
 124                 }
 125                 config_unset() {
 126                         append updatestr "config = update_config(config, \"-$1.$2\")" "$N"
 127                 }
 128                 config_clear() {
 129                         append updatestr "config = update_config(config, \"-$1\")" "$N"
 130                 }
 131
 132                 . "/tmp/.uci/$PACKAGE_BASE"
 133
 134                 # completely disable handlers so that they don't get in the way
 135                 config() {
 136                         return 0
 137                 }
 138                 option() {
 139                         return 0
 140                 }
 141
 142                 config_load "$PACKAGE"
 143                 CONFIG_FILENAME="${CONFIG_FILENAME:-$UCI_ROOT/etc/config/$PACKAGE_BASE}"
 144                 uci_do_update "$CONFIG_FILENAME" "$updatestr" > "/tmp/.uci/$PACKAGE_BASE.new" && {
 145                         mv -f "/tmp/.uci/$PACKAGE_BASE.new" "$CONFIG_FILENAME" && \
 146                         rm -f "/tmp/.uci/$PACKAGE_BASE"
 147                 }
 148         )
 149         $LOCK -u "/tmp/.uci/$PACKAGE_BASE.lock"
 150 }
 151
 152