added lowDiskSpace.bash

lowDiskSpace.bash

@@ -0,0 +1,142 @@
+#!/usr/bin/env bash
+
+START=$(date +%s.%N)
+
+arg1=${1:-''}
+
+if [[ $arg1 == '--help' || $arg1 == '-h' ]]; then
+    echo "Script author should have provided documentation"
+    exit 0
+fi
+
+#exit when command fails (use || true when a command can fail)
+set -o errexit
+
+#exit when your script tries to use undeclared variables
+set -o nounset
+
+# in scripts to catch mysqldump fails
+set -o pipefail
+
+# Resolve first directory of script
+PRG="$BASH_SOURCE"
+progname=`basename "$BASH_SOURCE"`
+
+while [ -h "$PRG" ] ; do
+    ls=`ls -ld "$PRG"`
+    link=`expr "$ls" : '.*-> \(.*\)$'`
+    if expr "$link" : '/.*' > /dev/null; then
+        PRG="$link"
+    else
+        PRG=`dirname "$PRG"`"/$link"
+    fi
+done
+
+__dir=$(dirname "$PRG")
+
+
+# Set magic variables for current file & dir
+__root="$(cd "$(dirname "${__dir}")" && pwd)"           # Dir of the dir of the script
+__file="${__dir}/$(basename "${BASH_SOURCE[0]}")"       # Full path of the script
+__base="$(basename ${__file})"                          # Name of the script
+ts=`date +'%Y%m%d-%H%M%S'`
+ds=`date +'%Y%m%d'`
+pid=`ps -ef | grep ${__base} | grep -v 'vi ' | head -n1 |  awk ' {print $2;} '`
+formerDir=`pwd`
+
+# If you require named arguments, see
+# http://stackoverflow.com/questions/192249/how-do-i-parse-command-line-arguments-in-bash
+
+#Set the config file
+configFile="$HOME/.${__base}.conf"
+
+#=== BEGIN Unique instance ============================================
+#Ensure only one copy is running
+pidfile=$HOME/.${__base}.pid
+if [ -f ${pidfile} ]; then
+   #verify if the process is actually still running under this pid
+   oldpid=`cat ${pidfile}`
+   result=`ps -ef | grep ${oldpid} | grep ${__base} || true`
+
+   if [ -n "${result}" ]; then
+     echo "Script already running! Exiting"
+     exit 255
+   fi
+fi
+
+#grab pid of this process and update the pid file with it
+echo ${pid} > ${pidfile}
+
+# Create trap for lock file in case it fails
+trap "rm -f $pidfile" INT QUIT TERM ERR
+#=== END Unique instance ============================================
+
+
+#Capture everything to log
+mkdir -p ~/log
+log=~/log/$__base-${ts}.log
+exec >  >(tee -a $log)
+exec 2> >(tee -a $log >&2)
+touch $log
+chmod 600 $log
+
+
+#Check that the config file exists
+if [[ ! -f "$configFile" ]] ; then
+        echo "I need a file at $configFile with an email address to warn" 
+        exit 1
+fi
+
+export DISPLAY=:0
+
+echo Begin `date`  .....
+
+echo; echo; echo;
+
+### BEGIN SCRIPT ###############################################################
+
+#(a.k.a set -x) to trace what gets executed
+set -o xtrace
+
+recipient=`cat $configFile`
+hostname=`hostname`
+
+sendAlert=0
+body=''
+IFS=$'\n'; for mount in `df`; do
+    if echo $mount | grep Filesystem ; then
+        continue
+    fi
+
+    CURRENT=$(echo $mount | awk '{ print $5}' | sed 's/%//g')
+    mountPoint=$(echo $mount | awk '{ print $6}' | sed 's/%//g')
+    filesystem=$(echo $mount | awk '{ print $1}' | sed 's/%//g')
+    THRESHOLD=90
+
+    if [ "$CURRENT" -gt "$THRESHOLD" ] ; then
+        sendAlert=1
+        body=`echo -e "${body}
+Your $mountPoint ($filesystem) partition remaining free space on $hostname is used at $CURRENT% \\n"`
+    fi
+done
+
+if [ "$sendAlert" -eq "1" ] ; then
+    subject="Dist space alert on `hostname`"
+    echo "$body" | mail -s "$subject" $recipient
+fi
+set +x
+
+### END SCIPT ##################################################################
+
+cd $formerDir
+
+END=$(date +%s.%N)
+DIFF=$(echo "round($END - $START)" | bc)
+echo; echo; echo;
+echo Done.  `date` - $DIFF seconds
+
+#=== BEGIN Unique instance ============================================
+if [ -f ${pidfile} ]; then
+    rm ${pidfile}
+fi
+#=== END Unique instance ============================================