/etc/config下的uci配置文件都是动态生成的，每个脚本文件对应一个uci配置文件
/etc/init.d目录下的脚本调用function.sh中的一些函数去修改/etc/config下的uci配置文件
//openwrtpackagease-filesfileslibfunction.sh
其中定义的主要函数功能如下：
//源码：
#!/bin/sh
# Copyright (C) 2006-2014 OpenWrt.org
# Copyright (C) 2006 Fokus Fraunhofer <carsten.tittel@fokus.fraunhofer.de>
# Copyright (C) 2010 Vertical Communications
debug () {
${DEBUG:-:} "$@"
}
# newline
N="
"
_C=0
NO_EXPORT=1
LOAD_STATE=1
LIST_SEP=" "
append() {
local var="$1"
local value="$2"
local sep="${3:- }"
eval "export ${NO_EXPORT:+-n} -- "$var=${$var:+${$var}${value:+$sep}}$value""
}
list_contains() {
local var="$1"
local str="$2"
local val
eval "val=" ${$var} ""
[ "${val%% $str *}" != "$val" ]
}
config_load() {
[ -n "$IPKG_INSTROOT" ] && return 0
uci_load "$@"
}
reset_cb() {
config_cb() { return 0; }
option_cb() { return 0; }
list_cb() { return 0; }
}
reset_cb
package() {
return 0
}
config () {
local cfgtype="$1"
local name="$2"
export ${NO_EXPORT:+-n} CONFIG_NUM_SECTIONS=$(($CONFIG_NUM_SECTIONS + 1))
name="${name:-cfg$CONFIG_NUM_SECTIONS}"
append CONFIG_SECTIONS "$name"
[ -n "$NO_CALLBACK" ] || config_cb "$cfgtype" "$name"
export ${NO_EXPORT:+-n} CONFIG_SECTION="$name"
export ${NO_EXPORT:+-n} "CONFIG_${CONFIG_SECTION}_TYPE=$cfgtype"
}
option () {
local varname="$1"; shift
local value="$*"
export ${NO_EXPORT:+-n} "CONFIG_${CONFIG_SECTION}_${varname}=$value"
[ -n "$NO_CALLBACK" ] || option_cb "$varname" "$*"
}
list() {
local varname="$1"; shift
local value="$*"
local len
config_get len "$CONFIG_SECTION" "${varname}_LENGTH" 0
[ $len = 0 ] && append CONFIG_LIST_STATE "${CONFIG_SECTION}_${varname}"
len=$(($len + 1))
config_set "$CONFIG_SECTION" "${varname}_ITEM$len" "$value"
config_set "$CONFIG_SECTION" "${varname}_LENGTH" "$len"
append "CONFIG_${CONFIG_SECTION}_${varname}" "$value" "$LIST_SEP"
list_cb "$varname" "$*"
}
config_unset() {
config_set "$1" "$2" ""
}
# config_get <variable> <section> <option> [<default>]
# config_get <section> <option>
config_get() {
case "$3" in
"") eval echo "${CONFIG_${1}_${2}:-${4}}";;
*) eval export ${NO_EXPORT:+-n} -- "${1}=${CONFIG_${2}_${3}:-${4}}";;
esac
}
# config_get_bool <variable> <section> <option> [<default>]
config_get_bool() {
local _tmp
config_get _tmp "$2" "$3" "$4"
case "$_tmp" in
1|on|true|yes|enabled) _tmp=1;;
0|off|false|no|disabled) _tmp=0;;
*) _tmp="$4";;
esac
export ${NO_EXPORT:+-n} "$1=$_tmp"
}
config_set() {
local section="$1"
local option="$2"
local value="$3"
local old_section="$CONFIG_SECTION"
CONFIG_SECTION="$section"
option "$option" "$value"
CONFIG_SECTION="$old_section"
}
config_foreach() {
local ___function="$1"
[ "$#" -ge 1 ] && shift
local ___type="$1"
[ "$#" -ge 1 ] && shift
local section cfgtype
[ -z "$CONFIG_SECTIONS" ] && return 0
for section in ${CONFIG_SECTIONS}; do
config_get cfgtype "$section" TYPE
[ -n "$___type" -a "x$cfgtype" != "x$___type" ] && continue
eval "$___function "$section" "$@""
done
}
config_list_foreach() {
[ "$#" -ge 3 ] || return 0
local section="$1"; shift
local option="$1"; shift
local function="$1"; shift
local val
local len
local c=1
config_get len "${section}" "${option}_LENGTH"
[ -z "$len" ] && return 0
while [ $c -le "$len" ]; do
config_get val "${section}" "${option}_ITEM$c"
eval "$function "$val" "$@""
c="$(($c + 1))"
done
}
insert_modules() {
for m in $*; do
if [ -f /etc/modules.d/$m ]; then
sed 's/^[^#]/insmod &/' /etc/modules.d/$m | ash 2>&- || :
else
modprobe $m
fi
done
}
default_prerm() {
local root="${IPKG_INSTROOT}"
local name
name=$(basename ${1%.*})
[ -f "$root/usr/lib/opkg/info/${name}.prerm-pkg" ] && . "$root/usr/lib/opkg/info/${name}.prerm-pkg"
local shell="$(which bash)"
for i in `cat "$root/usr/lib/opkg/info/${name}.list" | grep "^/etc/init.d/"`; do
if [ -n "$root" ]; then
${shell:-/bin/sh} "$root/etc/rc.common" "$root$i" disable
else
if [ "$PKG_UPGRADE" != "1" ]; then
"$i" disable
fi
"$i" stop || /bin/true
fi
done
}
add_group_and_user() {
local pkgname="$1"
local rusers="$(sed -ne 's/^Require-User: *//p' $root/usr/lib/opkg/info/${pkgname}.control 2>/dev/null)"
if [ -n "$rusers" ]; then
local tuple oIFS="$IFS"
for tuple in $rusers; do
local uid gid uname gname
IFS=":"
set -- $tuple; uname="$1"; gname="$2"
IFS="="
set -- $uname; uname="$1"; uid="$2"
set -- $gname; gname="$1"; gid="$2"
IFS="$oIFS"
if [ -n "$gname" ] && [ -n "$gid" ]; then
group_exists "$gname" || group_add "$gname" "$gid"
elif [ -n "$gname" ]; then
gid="$(group_add_next "$gname")"
fi
if [ -n "$uname" ]; then
user_exists "$uname" || user_add "$uname" "$uid" "$gid"
fi
if [ -n "$uname" ] && [ -n "$gname" ]; then
group_add_user "$gname" "$uname"
fi
unset uid gid uname gname
done
fi
}
default_postinst() {
local root="${IPKG_INSTROOT}"
local pkgname="$(basename ${1%.*})"
local ret=0
add_group_and_user "${pkgname}"
if [ -f "$root/usr/lib/opkg/info/${pkgname}.postinst-pkg" ]; then
( . "$root/usr/lib/opkg/info/${pkgname}.postinst-pkg" )
ret=$?
fi
if [ -d "$root/rootfs-overlay" ]; then
cp -R $root/rootfs-overlay/. $root/
rm -fR $root/rootfs-overlay/
fi
if [ -z "$root" ] && grep -q -s "^/etc/modules.d/" "/usr/lib/opkg/info/${pkgname}.list"; then
kmodloader
fi
if [ -z "$root" ] && grep -q -s "^/etc/uci-defaults/" "/usr/lib/opkg/info/${pkgname}.list"; then
. /lib/functions/system.sh
[ -d /tmp/.uci ] || mkdir -p /tmp/.uci
for i in $(sed -ne 's!^/etc/uci-defaults/!!p' "/usr/lib/opkg/info/${pkgname}.list"); do (
cd /etc/uci-defaults
[ -f "$i" ] && . ./"$i" && rm -f "$i"
) done
uci commit
fi
[ -n "$root" ] || rm -f /tmp/luci-indexcache 2>/dev/null
local shell="$(which bash)"
for i in $(grep -s "^/etc/init.d/" "$root/usr/lib/opkg/info/${pkgname}.list"); do
if [ -n "$root" ]; then
${shell:-/bin/sh} "$root/etc/rc.common" "$root$i" enable
else
if [ "$PKG_UPGRADE" != "1" ]; then
"$i" enable
fi
"$i" start
fi
done
return $ret
}
include() {
local file
for file in $(ls $1/*.sh 2>/dev/null); do
. $file
done
}
find_mtd_index() {
local PART="$(grep ""$1"" /proc/mtd | awk -F: '{print $1}')"
local INDEX="${PART##mtd}"
echo ${INDEX}
}
find_mtd_part() {
local INDEX=$(find_mtd_index "$1")
local PREFIX=/dev/mtdblock
[ -d /dev/mtdblock ] && PREFIX=/dev/mtdblock/
echo "${INDEX:+$PREFIX$INDEX}"
}
group_add() {
local name="$1"
local gid="$2"
local rc
[ -f "${IPKG_INSTROOT}/etc/group" ] || return 1
[ -n "$IPKG_INSTROOT" ] || lock /var/lock/group
echo "${name}:x:${gid}:" >> ${IPKG_INSTROOT}/etc/group
[ -n "$IPKG_INSTROOT" ] || lock -u /var/lock/group
}
group_exists() {
grep -qs "^${1}:" ${IPKG_INSTROOT}/etc/group
}
group_add_next() {
local gid gids
gid=$(grep -s "^${1}:" ${IPKG_INSTROOT}/etc/group | cut -d: -f3)
if [ -n "$gid" ]; then
echo $gid
return
fi
gids=$(cat ${IPKG_INSTROOT}/etc/group | cut -d: -f3)
gid=65536
while [ -n "$(echo "$gids" | grep "^$gid$")" ] ; do
gid=$((gid + 1))
done
group_add $1 $gid
echo $gid
}
group_add_user() {
local grp delim=","
grp=$(grep -s "^${1}:" ${IPKG_INSTROOT}/etc/group)
[ -z "$(echo $grp | cut -d: -f4 | grep $2)" ] || return
[ -n "$(echo $grp | grep ":$")" ] && delim=""
[ -n "$IPKG_INSTROOT" ] || lock /var/lock/passwd
sed -i "s/$grp/$grp$delim$2/g" ${IPKG_INSTROOT}/etc/group
[ -n "$IPKG_INSTROOT" ] || lock -u /var/lock/passwd
}
user_add() {
local name="${1}"
local uid="${2}"
local gid="${3}"
local desc="${4:-$1}"
local home="${5:-/var/run/$1}"
local shell="${6:-/bin/false}"
local rc
[ -z "$uid" ] && {
uids=$(cat ${IPKG_INSTROOT}/etc/passwd | cut -d: -f3)
uid=65536
while [ -n "$(echo "$uids" | grep "^$uid$")" ] ; do
uid=$((uid + 1))
done
}
[ -z "$gid" ] && gid=$uid
[ -f "${IPKG_INSTROOT}/etc/passwd" ] || return 1
[ -n "$IPKG_INSTROOT" ] || lock /var/lock/passwd
echo "${name}:x:${uid}:${gid}:${desc}:${home}:${shell}" >> ${IPKG_INSTROOT}/etc/passwd
echo "${name}:x:0:0:99999:7:::" >> ${IPKG_INSTROOT}/etc/shadow
[ -n "$IPKG_INSTROOT" ] || lock -u /var/lock/passwd
}
user_exists() {
grep -qs "^${1}:" ${IPKG_INSTROOT}/etc/passwd
}
board_name() {
[ -e /tmp/sysinfo/board_name ] && cat /tmp/sysinfo/board_name || echo "generic"
}
[ -z "$IPKG_INSTROOT" -a -f /lib/config/uci.sh ] && . /lib/config/uci.sh