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_call_awk() {
  43         local CMD="$*"
  44         awk -f $UCI_ROOT/lib/config/uci.awk -f - <<EOF
  45 BEGIN {
  46         $CMD
  47 }
  48 EOF
  49 }
  50
  51 uci_do_update() {
  52         local FILENAME="$1"
  53         local UPDATE="$2"
  54         uci_call_awk "
  55         config = read_file(\"$FILENAME\")
  56         $UPDATE
  57         print config
  58 "
  59 }
  60
  61 uci_add_update() {
  62         local PACKAGE="$1"
  63         local UPDATE="$2"
  64         local PACKAGE_BASE="$(basename "$PACKAGE")"
  65
  66         # FIXME: add locking?
  67         mkdir -p "/tmp/.uci"
  68         echo "$UPDATE" >> "/tmp/.uci/${PACKAGE_BASE}"
  69 }
  70
  71 uci_set() {
  72         local PACKAGE="$1"
  73         local CONFIG="$2"
  74         local OPTION="$3"
  75         local VALUE="$4"
  76
  77         ( # spawn a subshell so you don't mess up the current environment
  78                 uci_load "$PACKAGE"
  79                 config_get OLDVAL "$CONFIG" "$OPTION"
  80                 if [ "$OLDVAL" != "$VALUE" ]; then
  81                         config_get type "$CONFIG" TYPE
  82                         [ -z "$type" ]
  83                 fi
  84         ) || uci_add_update "$PACKAGE" "config_set '$CONFIG' '$OPTION' '$VALUE'"
  85 }
  86
  87 uci_add() {
  88         local PACKAGE="$1"
  89         local TYPE="$2"
  90         local CONFIG="$3"
  91
  92         uci_add_update "$PACKAGE" "config '$TYPE' '$CONFIG'"
  93 }
  94
  95 uci_rename() {
  96         local PACKAGE="$1"
  97         local CONFIG="$2"
  98         local VALUE="$3"
  99
 100         uci_add_update "$PACKAGE" "config_rename '$CONFIG' '$VALUE'"
 101 }
 102
 103 uci_remove() {
 104         local PACKAGE="$1"
 105         local CONFIG="$2"
 106         local OPTION="$3"
 107
 108         if [ -z "$OPTION" ]; then
 109                 uci_add_update "$PACKAGE" "config_clear '$CONFIG'"
 110         else
 111                 uci_add_update "$PACKAGE" "config_unset '$CONFIG' '$OPTION'"
 112         fi
 113 }
 114
 115 uci_commit() {
 116         local PACKAGE="$1"
 117         local PACKAGE_BASE="$(basename "$PACKAGE")"
 118
 119         mkdir -p /tmp/.uci
 120         LOCK=`which lock` || LOCK=:
 121         $LOCK "/tmp/.uci/$PACKAGE_BASE.lock"
 122         [ -f "/tmp/.uci/$PACKAGE_BASE" ] && (
 123                 updatestr=""
 124
 125                 # replace handlers
 126                 config() {
 127                         append updatestr "config = uci_update_config(config, \"@$2=$1\")" "$N"
 128                 }
 129                 option() {
 130                         append updatestr "config = uci_update_config(config, \"$CONFIG_SECTION.$1=$2\")" "$N"
 131                 }
 132                 config_rename() {
 133                         append updatestr "config = uci_update_config(config, \"&$1=$2\")" "$N"
 134                 }
 135                 config_unset() {
 136                         append updatestr "config = uci_update_config(config, \"-$1.$2\")" "$N"
 137                 }
 138                 config_clear() {
 139                         append updatestr "config = uci_update_config(config, \"-$1\")" "$N"
 140                 }
 141
 142                 . "/tmp/.uci/$PACKAGE_BASE"
 143
 144                 # completely disable handlers so that they don't get in the way
 145                 config() {
 146                         return 0
 147                 }
 148                 option() {
 149                         return 0
 150                 }
 151
 152                 config_load "$PACKAGE"
 153                 CONFIG_FILENAME="${CONFIG_FILENAME:-$UCI_ROOT/etc/config/$PACKAGE_BASE}"
 154                 uci_do_update "$CONFIG_FILENAME" "$updatestr" > "/tmp/.uci/$PACKAGE_BASE.new" && {
 155                         mv -f "/tmp/.uci/$PACKAGE_BASE.new" "$CONFIG_FILENAME" && \
 156                         rm -f "/tmp/.uci/$PACKAGE_BASE"
 157                 }
 158         )
 159         $LOCK -u "/tmp/.uci/$PACKAGE_BASE.lock"
 160 }
 161
 162