a76300fa0caa910929a0c33af1a7e581ea405751
[openwrt-10.03/.git] / 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 type "$CONFIG" TYPE
80                 [ -z "$type" ]
81         ) || uci_add_update "$PACKAGE" "config_set '$CONFIG' '$OPTION' '$VALUE'"
82 }
83
84 uci_add() {
85         local PACKAGE="$1"
86         local TYPE="$2"
87         local CONFIG="$3"
88
89         uci_add_update "$PACKAGE" "config '$TYPE' '$CONFIG'"
90 }
91
92 uci_rename() {
93         local PACKAGE="$1"
94         local CONFIG="$2"
95         local VALUE="$3"
96
97         uci_add_update "$PACKAGE" "config_rename '$CONFIG' '$VALUE'"
98 }
99
100 uci_remove() {
101         local PACKAGE="$1"
102         local CONFIG="$2"
103         local OPTION="$3"
104
105         if [ -z "$OPTION" ]; then
106                 uci_add_update "$PACKAGE" "config_clear '$CONFIG'"
107         else
108                 uci_add_update "$PACKAGE" "config_unset '$CONFIG' '$OPTION'"
109         fi
110 }
111
112 uci_commit() {
113         local PACKAGE="$1"
114         local PACKAGE_BASE="$(basename "$PACKAGE")"
115
116         mkdir -p /tmp/.uci
117         LOCK=`which lock` || LOCK=:
118         $LOCK "/tmp/.uci/$PACKAGE_BASE.lock"
119         [ -f "/tmp/.uci/$PACKAGE_BASE" ] && (
120                 updatestr=""
121                 
122                 # replace handlers
123                 config() {
124                         append updatestr "config = uci_update_config(config, \"@$2=$1\")" "$N"
125                 }
126                 option() {
127                         append updatestr "config = uci_update_config(config, \"$CONFIG_SECTION.$1=$2\")" "$N"
128                 }
129                 config_rename() {
130                         append updatestr "config = uci_update_config(config, \"&$1=$2\")" "$N"
131                 }
132                 config_unset() {
133                         append updatestr "config = uci_update_config(config, \"-$1.$2\")" "$N"
134                 }
135                 config_clear() {
136                         append updatestr "config = uci_update_config(config, \"-$1\")" "$N"
137                 }
138                 
139                 . "/tmp/.uci/$PACKAGE_BASE"
140
141                 # completely disable handlers so that they don't get in the way
142                 config() {
143                         return 0
144                 }
145                 option() {
146                         return 0
147                 }
148                 
149                 config_load "$PACKAGE"
150                 CONFIG_FILENAME="${CONFIG_FILENAME:-$UCI_ROOT/etc/config/$PACKAGE_BASE}"
151                 uci_do_update "$CONFIG_FILENAME" "$updatestr" > "/tmp/.uci/$PACKAGE_BASE.new" && {
152                         mv -f "/tmp/.uci/$PACKAGE_BASE.new" "$CONFIG_FILENAME" && \
153                         rm -f "/tmp/.uci/$PACKAGE_BASE"
154                 } 
155         )
156         $LOCK -u "/tmp/.uci/$PACKAGE_BASE.lock"
157 }
158
159