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

   1 #!/bin/sh
   2 # Shell script defining macros for manipulating config files
   3 #
   4 # Copyright (C) 2006 by Fokus Fraunhofer <carsten.tittel@fokus.fraumhofer.de>
   5 # Copyright (C) 2006 by 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 "$PACKAGE"
  23         local PACKAGE_BASE="$(basename "$PACKAGE")"
  24         [ -f "/tmp/.uci/${PACKAGE_BASE}" ] && {
  25                 . "/tmp/.uci/${PACKAGE_BASE}"
  26                 config_cb
  27         }
  28 }
  29
  30 uci_do_update() {
  31         local FILENAME="$1"
  32         local UPDATE="$2"
  33         awk -f /lib/config/uci-update.awk -f - <<EOF
  34 BEGIN {
  35         config = read_file("$FILENAME")
  36         $UPDATE
  37         print config
  38 }
  39 EOF
  40 }
  41
  42 uci_add_update() {
  43         local PACKAGE="$1"
  44         local UPDATE="$2"
  45         local PACKAGE_BASE="$(basename "$PACKAGE")"
  46
  47         # FIXME: add locking?
  48         mkdir -p "/tmp/.uci"
  49         echo "$UPDATE" >> "/tmp/.uci/${PACKAGE_BASE}"
  50 }
  51
  52 uci_set() {
  53         local PACKAGE="$1"
  54         local CONFIG="$2"
  55         local OPTION="$3"
  56         local VALUE="$4"
  57
  58         ( # spawn a subshell so you don't mess up the current environment
  59                 uci_load "$PACKAGE"
  60                 config_get type "$CONFIG" TYPE
  61                 [ -z "$type" ]
  62         ) || uci_add_update "$PACKAGE" "CONFIG_SECTION='$CONFIG'${N}option '$OPTION' '$VALUE'"
  63 }
  64
  65 uci_add() {
  66         local PACKAGE="$1"
  67         local TYPE="$2"
  68         local CONFIG="$3"
  69
  70         uci_add_update "$PACKAGE" "config '$TYPE' '$CONFIG'"
  71 }
  72
  73 uci_rename() {
  74         local PACKAGE="$1"
  75         local CONFIG="$2"
  76         local VALUE="$3"
  77
  78         uci_add_update "$PACKAGE" "config_rename '$CONFIG' '$VALUE'"
  79 }
  80
  81 uci_remove() {
  82         local PACKAGE="$1"
  83         local CONFIG="$2"
  84         local OPTION="$3"
  85
  86         if [ -z "$OPTION" ]; then
  87                 uci_add_update "$PACKAGE" "config_clear '$CONFIG'"
  88         else
  89                 uci_add_update "$PACKAGE" "config_unset '$CONFIG' '$OPTION'"
  90         fi
  91 }
  92
  93 uci_commit() {
  94         local PACKAGE="$1"
  95         local PACKAGE_BASE="$(basename "$PACKAGE")"
  96
  97         mkdir -p /tmp/.uci
  98         lock "/tmp/.uci/$PACKAGE_BASE.lock"
  99         [ -f "/tmp/.uci/$PACKAGE_BASE" ] && (
 100                 updatestr=""
 101
 102                 # replace handlers
 103                 config() {
 104                         append updatestr "config = update_config(config, \"@$2=$1\")" "$N"
 105                 }
 106                 option() {
 107                         append updatestr "config = update_config(config, \"$CONFIG_SECTION.$1=$2\")" "$N"
 108                 }
 109                 config_rename() {
 110                         append updatestr "config = update_config(config, \"&$1=$2\")" "$N"
 111                 }
 112                 config_unset() {
 113                         append updatestr "config = update_config(config, \"-$1.$2\")" "$N"
 114                 }
 115                 config_clear() {
 116                         append updatestr "config = update_config(config, \"-$1\")" "$N"
 117                 }
 118
 119                 . "/tmp/.uci/$PACKAGE_BASE"
 120
 121                 # completely disable handlers so that they don't get in the way
 122                 config() {
 123                         return 0
 124                 }
 125                 option() {
 126                         return 0
 127                 }
 128
 129                 config_load "$PACKAGE" || CONFIG_FILENAME="$ROOT/etc/config/$PACKAGE_BASE"
 130                 uci_do_update "$CONFIG_FILENAME" "$updatestr" > "/tmp/.uci/$PACKAGE_BASE.new" && {
 131                         mv -f "/tmp/.uci/$PACKAGE_BASE.new" "$CONFIG_FILENAME" && \
 132                         rm -f "/tmp/.uci/$PACKAGE_BASE"
 133                 }
 134         )
 135         lock -u "/tmp/.uci/$PACKAGE_BASE.lock"
 136 }
 137
 138