Flock commands so scripts/cronjobs don't overrun. Send email on failure.

fc.sh

#!/bin/bash

export from_name=''
lockfile=$1
flock=`which flock`
#uses mandrill-sendmail via @blackdotsh's https://raw.githubusercontent.com/blackdotsh/mandrillapp-cli/master/sendmail.sh
sendmail=$HOME/msendmail.sh
dt=`date`

$flock -xn "/tmp/$lockfile" echo "${@:2}"
if [ $? -eq 1 ]
then
  echo "$lockfile not executed @ $dt. Already running"
  $sendmail [email protected] $from_name "Failed to run $lockfile @ $dt cmd:${@:2}"
  exit 1
fi
$sendmail  [email protected] $from_name "Ran $lockfile @ $dt cmd:${@:2}"