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add new /bin/uci script and api for manipulating buildroot-ng config files
git-svn-id: svn://svn.openwrt.org/openwrt/branches/buildroot-ng/openwrt@4982 3c298f89-4303-0410-b956-a3cf2f4a3e73
This commit is contained in:
nbd
160
package/base-files/default/lib/config/uci-update.awk
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160
package/base-files/default/lib/config/uci-update.awk
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# Configuration update functions
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#
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# Copyright (C) 2006 by Fokus Fraunhofer <carsten.tittel@fokus.fraunhofer.de>
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# Copyright (C) 2006 by Felix Fietkau <nbd@openwrt.org>
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#
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# This program is free software; you can redistribute it and/or modify
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# it under the terms of the GNU General Public License as published by
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# the Free Software Foundation; either version 2 of the License, or
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# (at your option) any later version.
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#
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# This program is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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# General Public License for more details.
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#
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# You should have received a copy of the GNU General Public License
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# along with this program; if not, write to the Free Software
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# Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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function read_file(filename, result) {
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while ((getline <filename) == 1) {
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result = result $0 "\n"
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}
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gsub(/\n*$/, "", result)
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return result
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}
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function cmd2option(str, tmp) {
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if (match(str,"=")!=0) {
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res = "\toption " substr(str,1,RSTART-1) "\t'" substr(str,RSTART+1) "'"
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} else {
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res= ""
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}
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return res
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}
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function cmd2config(atype, aname) {
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return "config \"" atype "\" \"" aname "\""
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}
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function update_config(cfg, update, \
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lines, line, l, n, i, i2, section, scnt, remove, tmp, aidx, rest) {
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scnt = 1
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linecnt=split(cfg "\n", lines, "\n")
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cfg = ""
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for (n = 1; n < linecnt; n++) {
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# stupid parser for quoted arguments (e.g. for the type string).
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# not to be used to gather variable values (backslash escaping doesn't work)
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line = lines[n]
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gsub(/^[ \t]*/, "", line)
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gsub(/#.*$/, "", line)
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i2 = 1
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delete l
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rest = line
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while (length(rest)) {
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if (match(rest, /[ \t\"]+/)) {
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if (RSTART>1) {
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l[i2] = substr(rest,1,RSTART-1)
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i2++
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}
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aidx=index(rest,"\"")
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if (aidx>=RSTART && aidx<=RSTART+RLENGTH) {
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rest=substr(rest,aidx+1)
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# find the end of the string
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match(rest,/\"/)
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l[i2]=substr(rest,1,RSTART-1)
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i2++
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}
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rest=substr(rest,RSTART+RLENGTH)
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} else {
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l[i2] = rest
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i2++
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rest = ""
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}
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}
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line = lines[n]
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# when a command wants to set a config value for the current
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# section and a blank line is encountered before an option with
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# the same name, insert it here to maintain some coherency between
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# manually and automatically created option lines
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# if an option with the same name appears after this point, simply
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# ignore it, because it is already set.
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if ((section != "") && (l[1] != "option")) {
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if (line ~ /^[ \t]*$/) {
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if (update ~ "^" section "\\.") {
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gsub("^" section ".", "", update)
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cfg = cfg cmd2option(update) "\n"
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gsub(/=.*$/, "", update)
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update = "-" section "." update
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}
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}
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}
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if (l[1] == "config") {
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# look for all unset values
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if (section != "") {
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flag=0
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if (update ~ "^" section "\\.") {
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flag=1
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gsub("^" section ".", "", update)
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cfg = cfg cmd2option(update) "\n"
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update = "-" section "." update
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}
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if (flag!=0) cfg = cfg "\n"
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}
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remove = ""
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section = l[3]
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if (!length(section)) {
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section = "cfg" scnt
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}
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scnt++
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if (update == "-" section) {
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remove = "section"
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update = ""
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} else if (update ~ "^@" section "=") {
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update = ""
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} else if (update ~ "^&" section "=") {
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gsub("^&" section "=", "", update)
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line = cmd2config(l[2],update)
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update = ""
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}
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}
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if (remove == "option") remove = ""
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if (l[1] == "option") {
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if (update ~ "^-" section "\\." l[2] "$") remove = "option"
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# if a supplied config value already exists, replace the whole line
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if (match(update, "^" section "." l[2] "=")) {
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gsub("^" section ".", "", update)
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line = cmd2option(update)
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update = ""
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}
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}
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if (remove == "") cfg = cfg line "\n"
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}
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# any new options for the last section??
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if (section != "") {
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if (update ~ "^" section "\\.") {
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gsub("^" section ".", "", update)
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cfg = cfg cmd2option(update) "\n"
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update = "-" section "." update
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}
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}
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if (update ~ "^@") {
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# new section
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section = stype = substr(update,2)
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gsub(/=.*$/,"",section)
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gsub(/^.*=/,"",stype)
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cfg = cfg "\nconfig \"" stype "\" \"" section "\"\n"
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}
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return cfg
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}
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138
package/base-files/default/lib/config/uci.sh
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138
package/base-files/default/lib/config/uci.sh
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@@ -0,0 +1,138 @@
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#!/bin/sh
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# Shell script defining macros for manipulating config files
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#
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# Copyright (C) 2006 by Fokus Fraunhofer <carsten.tittel@fokus.fraumhofer.de>
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# Copyright (C) 2006 by Felix Fietkau <nbd@openwrt.org>
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#
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# This program is free software; you can redistribute it and/or modify
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# it under the terms of the GNU General Public License as published by
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# the Free Software Foundation; either version 2 of the License, or
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# (at your option) any later version.
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#
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# This program is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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# General Public License for more details.
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#
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# You should have received a copy of the GNU General Public License
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# along with this program; if not, write to the Free Software
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# Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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uci_load() {
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config_load "$PACKAGE"
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local PACKAGE_BASE="$(basename "$PACKAGE")"
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[ -f "/tmp/.uci/${PACKAGE_BASE}" ] && {
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. "/tmp/.uci/${PACKAGE_BASE}"
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config_cb
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}
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}
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uci_do_update() {
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local FILENAME="$1"
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local UPDATE="$2"
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awk -f /lib/config/uci-update.awk -f - <<EOF
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BEGIN {
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config = read_file("$FILENAME")
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$UPDATE
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print config
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}
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EOF
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}
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uci_add_update() {
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local PACKAGE="$1"
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local UPDATE="$2"
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local PACKAGE_BASE="$(basename "$PACKAGE")"
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# FIXME: add locking?
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mkdir -p "/tmp/.uci"
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echo "$UPDATE" >> "/tmp/.uci/${PACKAGE_BASE}"
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}
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uci_set() {
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local PACKAGE="$1"
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local CONFIG="$2"
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local OPTION="$3"
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local VALUE="$4"
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( # spawn a subshell so you don't mess up the current environment
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uci_load "$PACKAGE"
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config_get type "$CONFIG" TYPE
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[ -z "$type" ]
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) || uci_add_update "$PACKAGE" "CONFIG_SECTION='$CONFIG'${N}option '$OPTION' '$VALUE'"
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}
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uci_add() {
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local PACKAGE="$1"
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local TYPE="$2"
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local CONFIG="$3"
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uci_add_update "$PACKAGE" "config '$TYPE' '$CONFIG'"
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}
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uci_rename() {
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local PACKAGE="$1"
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local CONFIG="$2"
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local VALUE="$3"
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uci_add_update "$PACKAGE" "config_rename '$CONFIG' '$VALUE'"
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}
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uci_remove() {
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local PACKAGE="$1"
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local CONFIG="$2"
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local OPTION="$3"
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if [ -z "$OPTION" ]; then
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uci_add_update "$PACKAGE" "config_clear '$CONFIG'"
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else
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uci_add_update "$PACKAGE" "config_unset '$CONFIG' '$OPTION'"
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fi
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}
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uci_commit() {
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local PACKAGE="$1"
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local PACKAGE_BASE="$(basename "$PACKAGE")"
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mkdir -p /tmp/.uci
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lock "/tmp/.uci/$PACKAGE_BASE.lock"
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[ -f "/tmp/.uci/$PACKAGE_BASE" ] && (
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updatestr=""
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# replace handlers
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config() {
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append updatestr "config = update_config(config, \"@$2=$1\")" "$N"
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}
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option() {
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append updatestr "config = update_config(config, \"$CONFIG_SECTION.$1=$2\")" "$N"
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}
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config_rename() {
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append updatestr "config = update_config(config, \"&$1=$2\")" "$N"
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}
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config_unset() {
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append updatestr "config = update_config(config, \"-$1.$2\")" "$N"
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}
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config_clear() {
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append updatestr "config = update_config(config, \"-$1\")" "$N"
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}
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. "/tmp/.uci/$PACKAGE_BASE"
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# completely disable handlers so that they don't get in the way
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config() {
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return 0
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}
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option() {
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return 0
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}
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config_load "$PACKAGE" || CONFIG_FILENAME="$ROOT/etc/config/$PACKAGE_BASE"
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uci_do_update "$CONFIG_FILENAME" "$updatestr" > "/tmp/.uci/$PACKAGE_BASE.new" && {
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mv -f "/tmp/.uci/$PACKAGE_BASE.new" "$CONFIG_FILENAME" && \
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rm -f "/tmp/.uci/$PACKAGE_BASE"
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}
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)
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lock -u "/tmp/.uci/$PACKAGE_BASE.lock"
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}
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