openwrt /lib/function.sh
/lib/function.sh
#!/bin/sh
# Copyright (C) 2006-2014 OpenWrt.org
# Copyright (C) 2006 Fokus Fraunhofer
# config_get
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
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 $m
fi
done
}
default_prerm() {
local name
name=$(echo $(basename $1) | cut -d. -f1)
[ -f /usr/lib/opkg/info/${name}.prerm-pkg ] && . /usr/lib/opkg/info/${name}.prerm-pkg
for i in `cat /usr/lib/opkg/info/${name}.list | grep "^/etc/init.d/"`; do
$i disable
$i stop
done
}
default_postinst() {
local pkgname rusers
pkgname=$(echo $(basename $1) | cut -d. -f1)
rusers=$(grep "Require-User:" ${IPKG_INSTROOT}/usr/lib/opkg/info/${pkgname}.control)
[ -n "$rusers" ] && {
local user group uid gid
for a in $(echo $rusers | sed "s/Require-User://g"); do
user=""
group=""
for b in $(echo $a | sed "s/:/ /g"); do
local ugname ugid
ugname=$(echo $b | cut -d= -f1)
ugid=$(echo $b | cut -d= -f2)
[ -z "$user" ] && {
user=$ugname
uid=$ugid
continue
}
gid=$ugid
[ -n "$gid" ] && {
group_exists $ugname || group_add $ugname $gid
}
[ -z "$gid" ] && {
group_add_next $ugname
gid=$?
}
[ -z "$group" ] && {
user_exists $user || user_add $user "$uid" $gid
group=$ugname
continue
}
group_add_user $ugname $user
done
done
}
[ -f ${IPKG_INSTROOT}/usr/lib/opkg/info/${pkgname}.postinst-pkg ] && ( . ${IPKG_INSTROOT}/usr/lib/opkg/info/${pkgname}.postinst-pkg )
[ -n "${IPKG_INSTROOT}" ] || rm -f /tmp/luci-indexcache 2>/dev/null
[ "$PKG_UPGRADE" = "1" ] || for i in `cat ${IPKG_INSTROOT}/usr/lib/opkg/info/${pkgname}.list | grep "^/etc/init.d/"`; do
[ -n "${IPKG_INSTROOT}" ] && $(which bash) ${IPKG_INSTROOT}/etc/rc.common ${IPKG_INSTROOT}$i enable; \
[ -n "${IPKG_INSTROOT}" ] || {
$i enable
$i start
}
done
return 0
}
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}:" >> ${IPKG_INSTROOT}/etc/group
rc=$?
[ -n "$IPKG_INSTROOT" ] || lock -u /var/lock/group
return $rc
}
group_exists() {
grep -qs "^${1}:" ${IPKG_INSTROOT}/etc/group
}
group_add_next() {
local gid gids
gid=$(grep -s "^${1}:" ${IPKG_INSTROOT}/etc/group | cut -d: -f3)
[ -n "$gid" ] && return $gid
gids=$(cat ${IPKG_INSTROOT}/etc/group | cut -d: -f3)
gid=100
while [ -n "$(echo $gids | grep $gid)" ] ; do
gid=$((gid + 1))
done
group_add $1 $gid
return $gid
}
group_add_user() {
local grp delim=","
grp=$(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 ${IPKG_INSTROOT}/etc/passwd | cut -d: -f3)
uid=100
while [ -n "$(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:::" >> ${IPKG_INSTROOT}/etc/shadow
rc=$?
[ -n "$IPKG_INSTROOT" ] || lock -u /var/lock/passwd
return $rc
}
user_exists() {
grep -qs "^${1}:" ${IPKG_INSTROOT}/etc/passwd
}
[ -z "$IPKG_INSTROOT" -a -f /lib/config/uci.sh ] && . /lib/config/uci.sh
该脚本包含了常用的config, config_get等函数，
对Openwrt系统进行配置需要经常用到。