falter-common: add /etc/profile.d/dynbanner.sh

At login time the script dynbanner.sh fetches some dynamic system
information and prints it under the regular banner.

packages/falter-common/Makefile

@@ -4,7 +4,7 @@
 include $(TOPDIR)/rules.mk
 
 PKG_NAME:=falter-common
-PKG_RELEASE:=1
+PKG_RELEASE:=2
 
 PKG_BUILD_DIR := $(BUILD_DIR)/$(PKG_NAME)
 

packages/falter-common/files-common/etc/profile.d/dynbanner.sh

@@ -0,0 +1,21 @@
+#!/bin/sh
+
+# Get dynamic information and print them under the banner.
+
+HOSTNAME=$(uci -q get system.@system[0].hostname)".olsr"
+IPADDR=$(uci -q get network.dhcp.ipaddr)
+UPTIME=$(uptime | cut -d ',' -f 0 | cut -d ' ' -f 4-)
+FREEFL=$(df -h | grep " /overlay" | sed -E -e s/[[:space:]]+/\;/g | cut -d';' -f4 )
+SYS_LOAD=$(uptime | sed -e 's/average: /;/g' | cut -d';' -f2)
+CLIENTS=$(wc -l /tmp/dhcp.leases | cut -d' ' -f1)
+
+printf \
+" Host.............................: $HOSTNAME
+ IP-Address.......................: $IPADDR
+ Uptime...........................: $UPTIME
+ Free flash.......................: $FREEFL
+ Average load (1m, 5m, 15m).......: $SYS_LOAD
+ DHCP-Clients.....................: $CLIENTS
+
+
+"