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