diff --git a/install.sh b/install.sh
index 2065d03..a9a0d97 100755
--- a/install.sh
+++ b/install.sh
@@ -5,46 +5,61 @@ if ! [ "$(basename $0)" = "install.sh" ]; then
 	url="https://raw.githubusercontent.com/limosek/zaf/master/"
 	if ! which curl >/dev/null;
 	then
-		echo "Curl not found. Cannot continue. Please install it."
-		exit 2
+		zaf_err "Curl not found. Cannot continue. Please install it."
 	fi
-	echo "Installing from url $url..." >&2
-	[ -z "$*" ] && silent=silent
+	echo "Installing from url $url..."
+	[ -z "$*" ] && auto=auto
 	set -e
 	mkdir -p /tmp/zaf-installer \
 	&& cd /tmp/zaf-installer \
-	&& (for i in lib/zaf.lib.sh lib/os.lib.sh lib/ctrl.lib.sh install.sh ; do curl -f -k -s -L -o - "$url/$i") >install.sh \
+	&& (for i in lib/zaf.lib.sh lib/os.lib.sh lib/ctrl.lib.sh install.sh ; do curl -f -k -s -L -o - "$url/$i"; done) >install.sh \
 	&& chmod +x install.sh \
-	&& exec ./install.sh $silent "$@"
+	&& exec ./install.sh $auto "$@"
 	exit
 fi
 
-ZAF_CFG_FILE=/etc/zaf.conf
-. $(dirname $0)/lib/zaf.lib.sh
-. $(dirname $0)/lib/os.lib.sh
-. $(dirname $0)/lib/ctrl.lib.sh
+# Read options as config for ZAF
+for pair in "$@"; do
+    echo $pair | grep -q '^ZAF\_' || continue
+    option=$(echo $pair|cut -d '=' -f 1)
+    value=$(echo $pair|cut -d '=' -f 2-)
+    eval "C_${option}='$value'"
+done
 
-zaf_msg() {
-	[ "$ZAF_DEBUG" = "1" ] && echo $@
-}
+[ -z "$ZAF_CFG_FILE" ] && ZAF_CFG_FILE=$INSTALL_PREFIX/etc/zaf.conf
+[ -n "$C_ZAF_DEBUG" ] && ZAF_DEBUG=$C_ZAF_DEBUG
+[ -z "$ZAF_DEBUG" ] && ZAF_DEBUG=0
+
+if [ -f $(dirname $0)/lib/zaf.lib.sh ]; then
+    . $(dirname $0)/lib/zaf.lib.sh
+    . $(dirname $0)/lib/os.lib.sh
+    . $(dirname $0)/lib/ctrl.lib.sh
+fi
 
 # Read option. If it is already set in zaf.conf, it is skipped. If env variable is set, it is used instead of default
 # It sets global variable name on result.
 # $1 - option name
 # $2 - option description
 # $3 - default
-# $4 - if $4="silent" , use autoconf. if $4="user", force asking.
+# $4 - if $4="auto" , use autoconf. if $4="user", force asking.
 zaf_get_option(){
 	local opt
+
+        eval opt=\$C_$1
+	if [ -n "$opt" ]; then
+            eval "$1='$opt'"
+            zaf_dbg "Got '$2' <$1> from CLI: $opt"
+            return
+        fi
 	eval opt=\$$1
 	if [ -n "$opt" ] && ! [ "$4" = "user" ]; then
 		eval "$1='$opt'"
-		zaf_msg "Got $2 <$1> from ENV: $opt" >&2
+		zaf_dbg "Got '$2' <$1> from ENV: $opt"
 		return
 	else
 		opt="$3"
 	fi
-	if ! [ "$4" = "silent" ]; then
+	if ! [ "$4" = "auto" ]; then
 		echo -n "$2 <$1> [$opt]: "
 		read opt
 	else
@@ -52,9 +67,9 @@ zaf_get_option(){
 	fi
 	if [ -z "$opt" ]; then
 		opt="$3"
-		zaf_msg "Got $2 <$1> from Defaults: $opt" >&2
+		zaf_dbg "Got '$2' <$1> from Defaults: $opt" >&2
 	else
-		zaf_msg "Got $2 <$1> from USER: $opt"
+		zaf_dbg "Got '$2' <$1> from USER: $opt"
 	fi
 	eval "$1='$opt'"
 }
@@ -66,9 +81,9 @@ zaf_set_option(){
 	local description
 	if ! grep -q "^$1=" ${ZAF_CFG_FILE}; then
 		echo "$1='$2'" >>${ZAF_CFG_FILE}
-		zaf_msg "Saving $1 to $2 in ${ZAF_CFG_FILE}" >&2
+		zaf_dbg "Saving $1 to $2 in ${ZAF_CFG_FILE}" >&2
 	else
-		zaf_msg "Preserving $1 to $2 in ${ZAF_CFG_FILE}" >&2
+		zaf_wrn "Preserving $1 to $2 in ${ZAF_CFG_FILE}" >&2
 	fi
 }
 
@@ -81,27 +96,6 @@ zaf_getrest(){
 	fi
 }
 
-zaf_install(){
-	cp "$1" "$2"
-}
-
-zaf_install_exe(){
-	cp "$1" "$2"
-	chmod +x "$2"
-}
-
-# Automaticaly install agent if supported
-zaf_install_agent() {
-	case $ZAF_OS in
-	Debian)
-		curl "http://repo.zabbix.com/zabbix/3.0/debian/pool/main/z/zabbix-release/zabbix-release_3.0-1+${ZAF_CODENAME}_all.deb" >"/tmp/zaf-installer/zabbix-release_3.0-1+${ZAF_CODENAME}_all.deb" \
-		&& dpkg -i "/tmp/zaf-installer/zabbix-release_3.0-1+${ZAF_CODENAME}_all.deb" \
-		&& apt-get update \
-		&& apt-get install $ZAF_AGENT_PKG
-	;;
-	esac
-}
-
 # Set config option in zabbix agent
 # $1 option
 # $2 value
@@ -109,51 +103,51 @@ zaf_agent_set_option() {
 	local option="$1"
 	local value="$2"
 	if grep ^$option\= $ZAF_AGENT_CONFIG; then
-		echo "Moving option $option to zaf config part."
+		zaf_wrn "Moving option $option to zaf config part."
 		sed -i "s/$option=/#$option=/" $ZAF_AGENT_CONFIG
 	fi
 	echo "$option=$value" >> "$ZAF_AGENT_CONFIGD/zaf_options.conf"	
 }
 
 # Automaticaly configure agent if supported
-# Parameters are in format zabbixconfvar=value
+# Parameters are in format Z_zabbixconfvar=value
 zaf_configure_agent() {
 	local pair
 	local option
 	local value
 
-	touch "$ZAF_AGENT_CONFIGD/zaf_options.conf"
+        zaf_install_dir "$ZAF_AGENT_CONFIGD"
+	zaf_touch "$ZAF_AGENT_CONFIGD/zaf_options.conf" || zaf_err "Cannot access $ZAF_AGENT_CONFIGD/zaf_options.conf"
 	for pair in "$@"; do
-		echo $pair | grep -q '^Z\_' || continue
+		echo $pair | grep -q '^Z\_' || continue # Skip non Z_ vars
 		option=$(echo $pair|cut -d '=' -f 1|cut -d '_' -f 2)
 		value=$(echo $pair|cut -d '=' -f 2-)
 		zaf_agent_set_option "$option" "$value"
 	done
 }
 
-zaf_no_perms(){
-	echo "No permissions! to $1! Please become root or give perms. Exiting."
-	exit 2
-}
-
 zaf_configure(){
 
-	[ "$1" = "interactive" ] && ZAF_DEBUG=1
 	zaf_detect_system 
+        zaf_os_specific zaf_configure_os
+        if ! zaf_is_root; then
+            [ -z "$INSTALL_PREFIX" ] && zaf_err "We are not root. Use INSTALL_PREFIX or become root."
+        fi
 	zaf_get_option ZAF_PKG "Packaging system to use" "$ZAF_PKG" "$1"
 	zaf_get_option ZAF_OS "Operating system to use" "$ZAF_OS" "$1"
 	zaf_get_option ZAF_OS_CODENAME "Operating system codename" "$ZAF_OS_CODENAME" "$1"
 	zaf_get_option ZAF_AGENT_PKG "Zabbix agent package" "$ZAF_AGENT_PKG" "$1"
-	if [ -n "$ZAF_AGENT_PKG" ]; then
-		if ! zaf_check_deps "$ZAF_AGENT_PKG"; then
-			if [ "$1" = "silent" ]; then
-				zaf_install_agent
+	if zaf_is_root && [ -n "$ZAF_AGENT_PKG" ]; then
+		if ! zaf_os_specific zaf_check_deps "$ZAF_AGENT_PKG"; then
+			if [ "$1" = "auto" ]; then
+				zaf_os_specific zaf_install_agent
 			fi
 		fi
 	fi
 	zaf_get_option ZAF_CURL_INSECURE "Insecure curl (accept all certificates)" "1" "$1"
 	zaf_get_option ZAF_TMP_BASE "Tmp directory prefix (\$USER will be added)" "/tmp/zaf" "$1"
 	zaf_get_option ZAF_LIB_DIR "Libraries directory" "/usr/lib/zaf" "$1"
+        zaf_get_option ZAF_BIN_DIR "Directory to put binaries" "/usr/bin" "$1"
 	zaf_get_option ZAF_PLUGINS_DIR "Plugins directory" "${ZAF_LIB_DIR}/plugins" "$1"
 	zaf_get_option ZAF_PLUGINS_REPO "Plugins reposiory" "https://raw.githubusercontent.com/limosek/zaf-plugins/master/" "$1"
 	zaf_get_option ZAF_REPO_DIR "Plugins directory" "${ZAF_LIB_DIR}/repo" "$1"
@@ -163,9 +157,8 @@ zaf_configure(){
 	zaf_get_option ZAF_AGENT_BIN "Zabbix agent binary" "/usr/sbin/zabbix_agentd" "$1"
 	zaf_get_option ZAF_AGENT_RESTART "Zabbix agent restart cmd" "service zabbix-agent restart" "$1"
 	
-	if ! which $ZAF_AGENT_BIN >/dev/null; then
-		echo "Zabbix agent not installed? Use ZAF_ZABBIX_AGENT_BIN env variable to specify location. Exiting."
-		exit 3
+	if zaf_is_root && ! which $ZAF_AGENT_BIN >/dev/null; then
+		zaf_err "Zabbix agent not installed? Use ZAF_ZABBIX_AGENT_BIN env variable to specify location. Exiting."
 	fi
 	if which git >/dev/null; then
 		ZAF_GIT=1
@@ -173,8 +166,9 @@ zaf_configure(){
 		ZAF_GIT=""
 	fi
 
+        [ -n "$INSTALL_PREFIX" ] && zaf_install_dir "/etc"
 	if ! [ -f "${ZAF_CFG_FILE}" ]; then
-		touch "${ZAF_CFG_FILE}" || zaf_no_perms "${ZAF_CFG_FILE}"
+		touch "${ZAF_CFG_FILE}" || zaf_err "No permissions to ${ZAF_CFG_FILE}"
 	fi
 	
 	zaf_set_option ZAF_PKG "${ZAF_PKG}"
@@ -185,6 +179,7 @@ zaf_configure(){
 	zaf_set_option ZAF_CURL_INSECURE "${ZAF_CURL_INSECURE}"
 	zaf_set_option ZAF_TMP_BASE "$ZAF_TMP_BASE"
 	zaf_set_option ZAF_LIB_DIR "$ZAF_LIB_DIR"
+        zaf_set_option ZAF_BIN_DIR "$ZAF_BIN_DIR"
 	zaf_set_option ZAF_PLUGINS_DIR "$ZAF_PLUGINS_DIR"
 	zaf_set_option ZAF_PLUGINS_REPO "$ZAF_PLUGINS_REPO"
 	zaf_set_option ZAF_REPO_DIR "$ZAF_REPO_DIR"
@@ -198,44 +193,77 @@ zaf_configure(){
 if [ -f "${ZAF_CFG_FILE}" ]; then
 	. "${ZAF_CFG_FILE}"
 fi
-ZAF_TMP_DIR="${ZAF_TMP_BASE}-${USER}-$$"
+ZAF_TMP_DIR="${ZAF_TMP_BASE-/tmp/zaf}-${USER}-$$"
 
 case $1 in
 interactive)
+        shift
 	zaf_configure interactive
-	$0 install
+	$0 install "$@"
 	;;
-silent)
-	zaf_configure silent
-	zaf_configure_agent "$@"
+auto)
+        shift
+	zaf_configure auto
+        $0 install "$@"
+        ;;
+debug-auto)
+        shift;
+        ZAF_DEBUG=3 $0 auto "$@"
+        ;;
+debug-interactive)
+        shift;
+        ZAF_DEBUG=3 $0 interactive "$@"
+        ;;
+debug)
+        shift;
+        ZAF_DEBUG=3 $0 install "$@"
+        ;;
+reconf)
+        shift;
+        rm -f $ZAF_CFG_FILE
+        $0 install "$@"
+        ;;
+install)
+        zaf_configure auto
+        zaf_configure_agent "$@"
 	rm -rif ${ZAF_TMP_DIR}
 	mkdir -p ${ZAF_TMP_DIR}
-	mkdir -p ${ZAF_LIB_DIR}
-	mkdir -p ${ZAF_PLUGINS_DIR}
-	zaf_install $(zaf_getrest lib/zaf.lib.sh) ${ZAF_LIB_DIR}/zaf.lib.sh
-	zaf_install $(zaf_getrest lib/jshn.sh) ${ZAF_LIB_DIR}/jshn.sh
-	zaf_install_exe $(zaf_getrest lib/zaflock) ${ZAF_LIB_DIR}/zaflock
-	mkdir -p ${ZAF_TMP_DIR}/p/zaf
-	mkdir -p ${ZAF_PLUGINS_DIR}
-	zaf_install_exe $(zaf_getrest zaf) /usr/bin/zaf
-	/usr/bin/zaf install zaf
-	if  ! zaf_check_agent_config; then
+	zaf_install_dir ${ZAF_LIB_DIR}
+	zaf_install_dir ${ZAF_PLUGINS_DIR}
+	zaf_install $(zaf_getrest lib/zaf.lib.sh) ${ZAF_LIB_DIR}
+        zaf_install $(zaf_getrest lib/os.lib.sh) ${ZAF_LIB_DIR}
+        zaf_install $(zaf_getrest lib/ctrl.lib.sh) ${ZAF_LIB_DIR}
+	zaf_install $(zaf_getrest lib/jshn.sh) ${ZAF_LIB_DIR}
+	zaf_install_bin $(zaf_getrest lib/zaflock) ${ZAF_LIB_DIR}
+	zaf_install_dir ${ZAF_TMP_DIR}/p/zaf
+	zaf_install_dir ${ZAF_PLUGINS_DIR}
+        zaf_install_dir ${ZAF_BIN_DIR}
+	zaf_install_bin $(zaf_getrest zaf) ${ZAF_BIN_DIR}
+        export INSTALL_PREFIX ZAF_CFG_FILE
+        if zaf_is_root; then
+            ${INSTALL_PREFIX}/${ZAF_BIN_DIR}/zaf install zaf || zaf_err "Error installing zaf plugin."
+            if zaf_is_root && ! zaf_check_agent_config; then
 		echo "Something is wrong with zabbix agent config."
 		echo "Ensure that zabbix_agentd reads ${ZAF_AGENT_CONFIG}"
 		echo "and there is Include=${ZAF_AGENT_CONFIGD} directive inside."
 		echo "Does ${ZAF_AGENT_RESTART} work?"
 		exit 1
-	fi
+            fi
+        fi
 	rm -rif ${ZAF_TMP_DIR}
 	echo "Install OK. Use 'zaf' without parameters to continue."
 	;;
 *)
 	echo
 	echo "Please specify how to install."
-	echo "ZAF_CONFIG_OPTION=value [...] install.sh {silent|interactive} Z_option=value [...]"
-	echo "Example 1 (default install): install.sh silent"
-	echo 'Example 2 (preconfigure agent options): install.sh silent Z_Server=zabbix.server Z_ServerActive=zabbix.server Z_Hostname=$(hostname)'
-	echo "Example 3 (preconfigure zaf packaging system to use): ZAF_PKG=dpkg install.sh silent"
+	echo "install.sh {auto|interactive|debug-auto|debug-interactive|reconf} [Agent-Options] [Zaf-Options]"
+        echo "scratch means that config file will be created from scratch"
+        echo " Agent-Options: A_Option=value [...]"
+        echo " Zaf-Options: ZAF_OPT=value [...]"
+        echo 
+	echo "Example 1 (default install): install.sh auto"
+	echo 'Example 2 (preconfigure agent options): install.sh auto A_Server=zabbix.server A_ServerActive=zabbix.server A_Hostname=$(hostname)'
+	echo "Example 3 (preconfigure zaf packaging system to use): install.sh auto ZAF_PKG=opkg"
 	echo "Example 4 (interactive): install.sh interactive"
 	echo
 	exit 1
diff --git a/lib/ctrl.lib.sh b/lib/ctrl.lib.sh
index 99b3be7..49a9834 100644
--- a/lib/ctrl.lib.sh
+++ b/lib/ctrl.lib.sh
@@ -1,14 +1,5 @@
 # Control file related functions
 
-# Check plugin url
-# $1 plugin uri
-# $2 local file to fetch
-zaf_plugin_fetch_control() {
-	[ -z "$1" ] && return -1
-	local name=$(basename "$1")
-	zaf_fetch_url "$1/control.zaf" >"$2"
-}
-
 # Get block from stdin
 # $1 option
 # $2 name
@@ -24,7 +15,10 @@ zaf_ctrl_get_item_block() {
 		getline;
 		if (/^\/Item/) exit;
 		print $0;
-	}}'
+	}};
+	END {
+		exit i==0;
+	}'
 }
 
 # Get global plugin block body from stdin
@@ -44,26 +38,44 @@ zaf_block_get_moption() {
 	awk '/^'$1'::$/ { i=0;
 	while (i==0) {
 		getline;
-		if (/^::$/) exit;
+		if (/^::$/) {i=1; continue;};
 		print $0;
-	}}'
+	}};
+	END {
+		exit i==0;
+	}
+	'
 }
 
-# Get item singleline option
+# Get item singleline option from config block on stdin
 # $1 optionname
 zaf_block_get_option() {
 	grep "^$1:" | cut -d ' ' -f 2- | tr -d '\r\n'
 }
 
+# Get global option (single or multiline)
+# $1 - control file
+# $2 - option name
+zaf_ctrl_get_global_option() {
+	zaf_ctrl_get_global_block <$1 | zaf_block_get_moption "$2" || zaf_ctrl_get_global_block <$1 | zaf_block_get_option "$2"
+}
+# Get item specific option (single or multiline)
+# $1 - control file
+# $2 - item name
+# $3 - option name
+zaf_ctrl_get_item_option() {
+	zaf_ctrl_get_item_block <$1 "$2" | zaf_block_get_moption "$3" || zaf_ctrl_get_item_block <$1 "$2" | zaf_block_get_option "$3"
+}
+
 zaf_ctrl_check_deps() {
 	local deps
 	deps=$(zaf_ctrl_get_global_block <$1 | zaf_block_get_option "Depends-${ZAF_PKG}" )
-	zaf_check_deps $deps
+	zaf_os_specific zaf_check_deps $deps
 	deps=$(zaf_ctrl_get_global_block <$1 | zaf_block_get_option "Depends-bin" )
 	for cmd in $deps; do
 		if ! which $cmd >/dev/null; then
-			echo "Missing binary dependency $cmd. Please install it first."
-			return 1
+			zaf_wrn "Missing binary dependency $cmd. Please install it first."
+                        return 1
 		fi
 	done
 }
@@ -80,11 +92,11 @@ zaf_ctrl_install() {
 	pdir="$2"
 	binaries=$(zaf_ctrl_get_global_block <$1 | zaf_block_get_option "Install-bin" | zaf_far '{PLUGINDIR}' "$plugindir" )
 	for b in $binaries; do
-		zaf_fetch_url "$url/$b" >"$pdir/$b"
-		chmod +x "$pdir/$b"
+		zaf_fetch_url "$url/$b" >"${ZAF_TMP_DIR}/$b"
+                zaf_install_bin "${ZAF_TMP_DIR}/$b" "$pdir"
 	done
 	script=$(zaf_ctrl_get_global_block <$1 | zaf_block_get_moption "Install-script" | zaf_far '{PLUGINDIR}' "$plugindir" )
-	[ -n "$script" ] && eval $script
+	[ -n "$script" ] && eval "$script"
 	cmd=$(zaf_ctrl_get_global_block <$1 | zaf_block_get_option "Install-cmd" | zaf_far '{PLUGINDIR}' "$plugindir" )
 	[ -n "$cmd" ] && $cmd
 }
@@ -99,14 +111,24 @@ zaf_ctrl_generate_cfg() {
 
 	items=$(zaf_ctrl_get_items <"$1")
 	for i in $items; do
-		block=$(zaf_ctrl_get_item_block <$1 $i)
-		ilock=$(echo $i | tr -d '[]*&;:')
-		cmd=$(zaf_block_get_option <$1 "Cmd")
-		[ -n "$cmd" ] && { echo "UserParameter=$2.${i},$cmd"; continue; }
-		cmd=$(zaf_block_get_option <$1 "Function")
-		[ -n "$cmd" ] && { echo "UserParameter=$2.${i},${ZAF_LIB_DIR}/preload.sh $cmd"; continue; }
-		cmd=$(zaf_block_get_moption <$1 "Script")
-		[ -n "$cmd" ] && { zaf_block_get_moption <$1 "Script" >${ZAF_PLUGIN_DIR}/$2/$ilock.sh;  echo "UserParameter=$2.${i},${ZAF_PLUGIN_DIR}/$ilock.sh"; continue; }
+            ilock=$(echo $i | tr -d '[]*&;:')
+            cmd=$(zaf_ctrl_get_item_option $1 $i "Cmd")
+            if [ -n "$cmd" ]; then
+                echo "UserParameter=$2.${i},$cmd";
+                continue
+            fi
+            cmd=$(zaf_ctrl_get_item_option $1 $i "Function")
+            if [ -n "$cmd" ]; then
+                echo "UserParameter=$2.${i},${ZAF_LIB_DIR}/preload.sh $cmd";
+                continue;
+            fi
+            cmd=$(zaf_ctrl_get_item_option $1 $i "Script")
+            if [ -n "$cmd" ]; then
+                zaf_ctrl_get_item_option $1 $i "Script" >${ZAF_TMP_DIR}/${ilock}.sh;
+                zaf_install_bin ${ZAF_TMP_DIR}/${ilock}.sh ${ZAF_PLUGINS_DIR}/$2/
+                echo "UserParameter=$2.${i},${ZAF_PLUGINS_DIR}/$2/${ilock}.sh";
+                continue;
+            fi
 	done
 }
 
diff --git a/lib/os.lib.sh b/lib/os.lib.sh
index 7aec92c..ba62be1 100644
--- a/lib/os.lib.sh
+++ b/lib/os.lib.sh
@@ -1,41 +1,102 @@
 # Os related functions
 
+zaf_configure_os_openwrt() {
+    ZAF_AGENT_RESTART="/etc/init.d/zabbix_agentd restart"
+    ZAF_AGENT_CONFIGD="/var/run/zabbix_agentd.conf.d/"
+    ZAF_AGENT_CONFIG="/etc/zabbix_agentd.conf"
+    ZAF_AGENT_PKG="zabbix-agentd"
+    ZAF_CURL_INSECURE=1
+}
+
 zaf_detect_system() {
 	if which dpkg >/dev/null; then
-		ZAF_PKG="dpkg"
-		ZAF_OS=$(lsb_release -is)
-		ZAF_OS_CODENAME=$(lsb_release -cs)
+		ZAF_PKG=dpkg
+		ZAF_OS=$(lsb_release -is|tr '[:upper:]' '[:lower:]')
+		ZAF_OS_CODENAME=$(lsb_release -cs|tr '[:upper:]' '[:lower:]')
 		ZAF_CURL_INSECURE=0
 		ZAF_AGENT_PKG="zabbix-agent"
 		return
 	else if which rpm >/dev/null; then
 		ZAF_PKG="rpm"
-		ZAF_OS=$(lsb_release -is)
-		ZAF_OS_CODENAME=$(lsb_release -cs)
+		ZAF_OS=$(lsb_release -is|tr '[:upper:]' '[:lower:]')
+		ZAF_OS_CODENAME=$(lsb_release -cs|tr '[:upper:]' '[:lower:]')
 		ZAF_CURL_INSECURE=0
 		ZAF_AGENT_PKG="zabbix-agent"
 		return
 	else if which opkg >/dev/null; then
 		ZAF_PKG="opkg"
 		. /etc/openwrt_release
-		ZAF_OS="$DISTRIB_ID"
-		ZAF_OS_CODENAME="$DISTRIB_CODENAME"
-		ZAF_AGENT_RESTART="/etc/init.d/zabbix_agentd restart"
-		ZAF_AGENT_CONFIGD="/var/run/zabbix_agentd.conf.d/"
-		ZAF_AGENT_CONFIG="/etc/zabbix_agentd.conf"
-		ZAF_AGENT_PKG="zabbix-agentd"
-		ZAF_CURL_INSECURE=1
+		ZAF_OS="$(echo $DISTRIB_ID|tr '[:upper:]' '[:lower:]')"
+		ZAF_OS_CODENAME="$(echo $DISTRIB_CODENAME|tr '[:upper:]' '[:lower:]')"
 		return	
 	else
 		ZAF_PKG="unknown"
 		ZAF_OS="unknown"
 		ZAF_OS_CODENAME="unknown"
 		ZAF_AGENT_PKG=""
+                return
 	  fi
 	 fi
 	fi
 }
 
+# Run OS specific command
+# $1 - name of the function.
+# all variants will be tested. (name_os_codename, name_os, name_{dpkg|opkg|rpm}, name )
+zaf_os_specific(){
+    local func="$1"
+    
+    if type "${func}_${ZAF_OS}_${ZAF_OS_CODENAME}" >/dev/null 2>/dev/null; then
+        eval "${func}_${ZAF_OS}_${ZAF_OS_CODENAME} $2 $3 $4 $5 $6"
+    else if type "${func}_${ZAF_OS}" >/dev/null 2>/dev/null; then
+        eval "${func}_${ZAF_OS} $2 $3 $4 $5 $6" 
+    else if type "${func}_${ZAF_PKG}" >/dev/null 2>/dev/null; then
+        eval "${func}_${ZAF_PKG} $2 $3 $4 $5 $6"
+    else
+        zaf_dbg "No OS/packager specific implementation for $1"
+      fi
+     fi
+    fi
+}
+
+zaf_is_root(){
+    [ "$USER" = "root" ]
+}
+
+# Install file, bin or directory and respect install prefix 
+# $1 - src file
+# $2 - directory
+zaf_install(){
+    zaf_dbg "Install file $1 to $INSTALL_PREFIX/$2/$(basename $1)"
+    cp "$1" "$INSTALL_PREFIX/$2/$(basename $1)"
+}
+# $1 - src file
+# $2 - directory
+zaf_install_bin(){
+    zaf_dbg "Install binary $1 to $INSTALL_PREFIX/$2/$(basename $1)"
+    cp "$1" "$INSTALL_PREFIX/$2/$(basename $1)"
+    chmod +x "$INSTALL_PREFIX/$2/$(basename $1)"
+}
+# $1 - directory
+zaf_install_dir(){
+    zaf_dbg "Install directory $1 to $INSTALL_PREFIX/$1"
+    mkdir -p "$INSTALL_PREFIX/$1"
+}
+# $1 - file
+zaf_touch(){
+    zaf_dbg "Touch $INSTALL_PREFIX/$1"
+    touch "$INSTALL_PREFIX/$1"
+}
+
+# Automaticaly install agent on debian
+# For another os, create similar function (install_zabbix_centos)
+zaf_install_agent_debian() {
+    zaf_fetch_url "http://repo.zabbix.com/zabbix/3.0/debian/pool/main/z/zabbix-release/zabbix-release_3.0-1+${ZAF_CODENAME}_all.deb" >"/tmp/zaf-installer/zabbix-release_3.0-1+${ZAF_CODENAME}_all.deb" \
+	&& dpkg -i "/tmp/zaf-installer/zabbix-release_3.0-1+${ZAF_CODENAME}_all.deb" \
+	&& apt-get update \
+	&& apt-get install $ZAF_AGENT_PKG
+}
+
 # Check if dpkg dependency is met
 # $* - packages
 zaf_check_deps_dpkg() {
@@ -57,18 +118,4 @@ zaf_check_deps_opkg() {
 	done
 }
 
-# Check dependency based on system
-zaf_check_deps() {
-	case $ZAF_PKG in
-	dpkg)	zaf_check_deps_dpkg $*
-		;;
-	opkg)	zaf_check_deps_opkg $*
-		;;
-	rpm)	zaf_check_deps_rpm $*
-		;;
-	*)	return
-		;;
-	esac
-}
-
 
diff --git a/lib/zaf.lib.sh b/lib/zaf.lib.sh
index fbc1d26..b2fa1a6 100644
--- a/lib/zaf.lib.sh
+++ b/lib/zaf.lib.sh
@@ -2,7 +2,18 @@
 ############################################ Common routines
 
 zaf_msg() {
-	[ "$ZAF_DEBUG" = "1" ] && echo $@
+	echo $@
+}
+zaf_dbg() {
+	[ "$ZAF_DEBUG" -ge "3" ] && logger -s -t zaf $@
+}
+zaf_wrn() {
+	[ "$ZAF_DEBUG" -ge "2" ] && logger -s -t zaf $@
+}
+zaf_err() {
+	logger -s -t zaf $@
+        logger -s -t zaf "Exiting with error!"
+        exit 1
 }
 
 # Fetch url to stdout 
@@ -87,13 +98,13 @@ zaf_version() {
 
 # Restart zabbix agent
 zaf_restart_agent() {
-	${ZAF_AGENT_RESTART}
+	${ZAF_AGENT_RESTART} || zaf_err "Cannot restart Zabbix agent (${ZAF_AGENT_RESTART})!"
 }
 
 # Check if zaf.version item is populated
 zaf_check_agent_config() {
 	zaf_restart_agent
-	zabbix_agentd -t zaf.version
+	${ZAF_AGENT_BIN} -t zaf.version
 }
 
 # Update repo
@@ -103,7 +114,6 @@ zaf_update_repo() {
 	[ -n "${ZAF_PLUGINS_REPO}" ] && cd ${ZAF_REPO_DIR} && git pull
 }
 
-
 # Construct url from plugin name
 # It can be http[s]://url
 # /path (from file)
@@ -153,26 +163,25 @@ zaf_plugin_info() {
 # Prepare plugin into tmp dir 
 # $1 is url, directory or plugin name (will be searched in default plugin dir). 
 # $2 is directory to prepare. 
+# $3 plugin name 
 zaf_prepare_plugin() {
-	url=$(zaf_get_plugin_url "$1")
+	url=$(zaf_get_plugin_url "$1")/control.zaf
 	plugindir="$2"
 	control=${plugindir}/control.zaf
-	echo "Fetching control file from $url ..."
-	if zaf_plugin_fetch_control "$url" "${control}"; then
+	zaf_dbg "Fetching control file from $url ..."
+	if zaf_fetch_url "$url" >"${control}"; then
 		zaf_plugin_info "${control}"
 		zaf_ctrl_check_deps "${control}"
 	else
-		echo "Cannot fetch control file!"
-		return 1
+		zaf_err "Cannot fetch or write control file!"
 	fi
 }
 
 zaf_install_plugin() {
 	mkdir "${ZAF_TMP_DIR}/plugin"
-	
 	if zaf_prepare_plugin "$1" "${ZAF_TMP_DIR}/plugin"; then
+                plugin=$(zaf_ctrl_get_global_block <"${ZAF_TMP_DIR}/plugin/control.zaf" | zaf_block_get_option Plugin)
 		plugindir="${ZAF_PLUGINS_DIR}"/$plugin
-		echo $plugindir;exit;
 		if zaf_prepare_plugin "$1" $plugindir; then
 			zaf_ctrl_check_deps "${control}"
 			zaf_ctrl_install "${control}" "${plugin}" 
@@ -184,10 +193,10 @@ zaf_install_plugin() {
 				zaf_far '{ZAFLOCK}' "${ZAF_LIB_DIR}/zaflock '$plugin' " \
 				>$plugindir/zabbix.conf
 		else
-			echo "Bad control file $control ($url)!"
-			cat $control
-			exit 4
+			zaf_err "Cannot install plugin $plugin to $plugindir!"
 		fi
+        else
+            return 1
 	fi
 
 }
diff --git a/zaf b/zaf
index 87becfb..ed637e5 100755
--- a/zaf
+++ b/zaf
@@ -1,25 +1,24 @@
 #!/bin/sh
 
-if [ -f /etc/zaf.conf  ]; then
-	. /etc/zaf.conf
+ZAF_CFG_FILE="/etc/zaf.conf"
+if [ -f $ZAF_CFG_FILE ]; then
+	. $ZAF_CFG_FILE
 else
-	echo "Missing config file /etc/zaf.conf! Exiting."
+	echo "Missing config file $ZAF_CFG_FILE! Exiting."
 	exit 2
 fi
+[ -d $(dirname $0)/.git ] && ZAF_LIB_DIR=$(dirname $0)/lib
 
 [ -z "$ZAF_TMP_BASE" ] && ZAF_TMP_BASE=/tmp/zaf
 ZAF_TMP_DIR="${ZAF_TMP_BASE}-${USER}-$$"
 trap "rm -rif ${ZAF_TMP_DIR}" EXIT
 ! [ -d "${ZAF_TMP_DIR}" ] && mkdir "${ZAF_TMP_DIR}"
-
-# Devel version
-if [ -f $(dirname $0)/lib/zaf.lib.sh ]; then
-	ZAF_LIB_DIR=$(realpath $(dirname $0)/lib)
-fi
+[ -z "$ZAF_DEBUG" ] && ZAF_DEBUG=0
 
 . ${ZAF_LIB_DIR}/zaf.lib.sh
 . ${ZAF_LIB_DIR}/os.lib.sh
 . ${ZAF_LIB_DIR}/ctrl.lib.sh
+[ -f ${ZAF_LIB_DIR}/zaf.${ZAF_OS}.sh ] && . ${ZAF_LIB_DIR}/zaf.${ZAF_OS}.sh
 
 case $1 in