From d99234ae958c68b22f55f4f4da18635fa70e263b Mon Sep 17 00:00:00 2001
From: Ole Tange <ole@tange.dk>
Date: Fri, 13 Apr 2012 00:23:41 +0200
Subject: [PATCH] Added w4it-for-port-open + zram init.

---
 w4it-for-port-open/w4it-for-port-open | 59 ++++++++++++++++++++
 zram-init/zram                        | 80 +++++++++++++++++++++++++++
 2 files changed, 139 insertions(+)
 create mode 100755 w4it-for-port-open/w4it-for-port-open
 create mode 100755 zram-init/zram

diff --git a/w4it-for-port-open/w4it-for-port-open b/w4it-for-port-open/w4it-for-port-open
new file mode 100755
index 0000000..7517934
--- /dev/null
+++ b/w4it-for-port-open/w4it-for-port-open
@@ -0,0 +1,59 @@
+#!/bin/bash
+
+HOST=$1
+PORT=$2
+
+usage () {
+  echo "Usage:"
+  echo "  $0 host [port]"
+  echo "  port defaults to 22 (ssh)"
+  exit 1
+}
+
+print_not_reachable () {
+  if [ "$NOT_REACHABLE" = "1" ] ; then
+    echo -n .
+  else
+    echo -n $HOST:$PORT is not reachable
+    NOT_REACHABLE=1
+  fi
+}
+
+print_up_but_port_closed () {
+  if [ "$PORT_CLOSED" = "1" ] ; then
+    echo -n .
+  else
+    echo -n $HOST is up but port $PORT is closed
+    PORT_CLOSED=1
+  fi
+}
+
+
+port_is_open () {
+    # If tcptraceroute stops working use:
+    # echo | nc -w 2 $HOST $PORT || failed
+    OUT=$(tcptraceroute -f 255 -m 255 -q 1 -w 1 $HOST $PORT 2>&1)
+    if echo "$OUT" | grep 'Destination not reached' >/dev/null ; then
+	print_not_reachable
+	OPEN=no
+    elif echo "$OUT" | grep '\[closed\]' >/dev/null ; then
+	print_up_but_port_closed
+	sleep 1
+	OPEN=no
+    else
+	OPEN=yes
+    fi
+}
+
+if [ -z "$HOST" ] ; then
+  usage
+fi
+if [ -z "$PORT" ] ; then
+  PORT=22
+fi
+
+port_is_open
+while [ "$OPEN" = "no" ] ; do
+  port_is_open
+done
+echo
diff --git a/zram-init/zram b/zram-init/zram
new file mode 100755
index 0000000..93e7ddb
--- /dev/null
+++ b/zram-init/zram
@@ -0,0 +1,80 @@
+#!/bin/bash
+### BEGIN INIT INFO
+# Provides: zram
+# Required-Start:
+# Required-Stop:
+# Default-Start: 2 3 4 5
+# Default-Stop: 0 1 6
+# Short-Description: Increased Performance In Linux With zRam (Virtual Swap Compressed in RAM)
+# Description: Adapted from systemd scripts at https://github.com/mystilleef/FedoraZram
+### END INIT INFO
+# Author: tradetaxfree http://crunchbanglinux.org/forums/topic/15344/zram-a-good-idea/
+
+start() {
+    # get the number of CPUs
+    num_cpus=$(grep -c processor /proc/cpuinfo)
+    # if something goes wrong, assume we have 1
+    [ "$num_cpus" != 0 ] || num_cpus=1
+
+    # set decremented number of CPUs
+    decr_num_cpus=$((num_cpus - 1))
+
+    # get the amount of memory in the machine
+    mem_total_kb=$(grep MemTotal /proc/meminfo | grep -E --only-matching '[[:digit:]]+')
+    mem_total=$((mem_total_kb * 1024))
+
+    # load dependency modules
+    modprobe zram zram_num_devices=$num_cpus
+
+    # initialize the devices
+    for i in $(seq 0 $decr_num_cpus); do
+    echo $((mem_total / num_cpus)) > /sys/block/zram$i/disksize
+    done
+
+    # Creating swap filesystems
+    for i in $(seq 0 $decr_num_cpus); do
+    mkswap /dev/zram$i
+    done
+
+    # Switch the swaps on
+    for i in $(seq 0 $decr_num_cpus); do
+    swapon -p 100 /dev/zram$i
+    done
+}
+
+stop() {
+    # get the number of CPUs
+    num_cpus=$(grep -c processor /proc/cpuinfo)
+
+    # set decremented number of CPUs
+    decr_num_cpus=$((num_cpus - 1))
+
+    # Switching off swap
+    for i in $(seq 0 $decr_num_cpus); do
+    if [ "$(grep /dev/zram$i /proc/swaps)" != "" ]; then
+    swapoff /dev/zram$i
+    sleep 0.1
+    fi
+    done
+
+    sleep 0.1
+    modprobe -r zram
+}
+
+case "$1" in
+    start)
+        start
+        ;;
+    stop)
+        stop
+        ;;
+    restart)
+        stop
+        sleep 3
+        start
+        ;;
+    *)
+        echo "Usage: $0 {start|stop|restart}"
+        RETVAL=1
+esac
+exit $RETVAL